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EcoSIS Spectra from in situ deciduous leaves and leaves collected for nitrogen analysis throughout autumn (reflectance)

ecosis · NIR

EcoSIS Spectra from in situ deciduous leaves and leaves collected for nitrogen analysis throughout autumn (reflectance). v2.0 standardized NIRS package: 1 spectral source(s), 11 declared target(s). Auto-generated from dataset_card.json (verify before publication).

nirv2ecosis
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Private dataset. Full metadata and metrics are shown, but the bytes are not redistributed here — exporting the data requires a Dataverse token. The identity card carries no spectra, only descriptive statistics.
1,013
samples
781
wavelengths
1
sources
11
targets
27
metadata
NIR
family

Dataset property explorer

Mean profile risk0.56
Highest axisArtefacts locaux · 1.00
Diagnostics8
Sources profiled1
EcoSIS Spectra from in situ deciduous leaves and leaves collected for nitrogen analysis throughout autumn (reflectance) property profile0.250.50.751integritynoiseartefactsbaselinePCA outliersreferencerepeatabilitystructureEcoSIS Spectra from in situ deciduous leaves and leaves collected for nitrogen analysis throughout autumn (reflectance) profileintegrity: 0.00noise: 0.01artefacts: 1.00baseline: 1.00PCA outliers: 0.66reference: 1.00repeatability: 0.00structure: 0.83EcoSIS Spectra …0 center · 1 outer ring · outward = stronger anomaly / heterogeneity signal

Profile axes

Intégrité0.00
Artefacts locaux1.00
Bruit0.01
Outliers PCA0.66
Distance à la référence1.00
Répétabilité0.00
Baseline / forme1.00
Structure multi-régimes0.83
Diagnostic hypotheses00.250.50.751hypothesis scoreSplice / raccord détecteursSplice / raccord détecteurs: 0.870.87Erreur calibration / référenc…Erreur calibration / référence blanche: 0.770.77Fond différentFond différent: 0.710.71Erreur interpolation / réécha…Erreur interpolation / rééchantillonnage: 0.680.68Signature VERA25-likeSignature VERA25-like: 0.670.67Différence de sonde / géométr…Différence de sonde / géométrie: 0.610.61Dataset multi-régimesDataset multi-régimes: 0.570.57Spectre hors domaine valideSpectre hors domaine valide: 0.550.55
DiagnosticScoreForceSignauxInterprétation probable
Splice / raccord détecteursX0.87forteSpike rate 1.00, Jump rate 1.00, RMS/SAM référence 1.00Rupture aux jonctions de détecteurs, calibration locale ou sonde différente.
Erreur calibration / référence blancheX0.77forteBaseline/mean/area 1.00, RMS/SAM référence 1.00, artefacts locaux 1.00Décalage systématique entre campagnes, instruments ou référence blanche.
Fond différentX0.71moyenneBaseline/mean/area 1.00, RMS/SAM référence 1.00, PCA Q 0.66Effet systématique du support, blanc/noir, transflectance ou environnement de mesure.
Erreur interpolation / rééchantillonnageX0.68moyenneSpike rate 1.00, Jump rate 1.00, SNR normal/élevé 1.00Artefacts numériques ou traitement spectral incorrect.
Signature VERA25-likeX0.67moyenneSpike rate 1.00, Jump rate 1.00, RMS/SAM référence 1.00Combinaison possible changement de sonde + splice, amplifiée par géométrie, fond ou calibration.
Différence de sonde / géométrieX0.61moyenneBaseline/mean/area 1.00, RMS/SAM référence 1.00, PCA Q 0.66Modification de l'illumination, collecte, angle ou distance sonde-échantillon.
Dataset multi-régimesX0.57moyenneRMS/SAM référence 1.00, Structure PCA 0.83, PCA Q 0.66Mélange de campagnes, opérateurs, lots, setups ou sous-populations spectrales.
Spectre hors domaine valideX0.55moyenneRMS/SAM référence 1.00, Structure PCA 0.83, Mahalanobis / T2 0.59Variété, espèce, lot ou condition différente mais physiquement plausible.

Spectral sources

CollectedDryAutumnSpectra2016.csv

X · NIR · Spectral Evolution PSP1100
CollectedDryAutumnSpectra2016.csv spectra0204060802004006008001,0001,200q05-q95 envelopeq25-q75 envelopemedian spectrummedianq25–q75q05–q95wavelength / nm320nm — median 17.46 (q25–q75 14.04–21.22)326nm — median 16.41 (q25–q75 13.06–20)331nm — median 15.46 (q25–q75 12.52–19.06)337nm — median 14.35 (q25–q75 11.36–17.42)342nm — median 13.29 (q25–q75 10.33–16.1)348nm — median 12.24 (q25–q75 9.795–15.31)354nm — median 11.38 (q25–q75 9.305–13.9)359nm — median 10.05 (q25–q75 8.126–12.54)365nm — median 9.821 (q25–q75 7.924–11.95)371nm — median 9.26 (q25–q75 7.431–11.6)376nm — median 8.403 (q25–q75 6.797–10.59)382nm — median 7.841 (q25–q75 6.095–9.913)387nm — median 7.703 (q25–q75 5.947–9.814)393nm — median 7.014 (q25–q75 5.495–9.051)399nm — median 6.631 (q25–q75 5.006–8.604)404nm — median 6.538 (q25–q75 4.945–8.611)410nm — median 6.421 (q25–q75 4.841–8.365)415nm — median 6.179 (q25–q75 4.684–8.181)421nm — median 6.07 (q25–q75 4.533–8.053)427nm — median 6.226 (q25–q75 4.662–8.225)432nm — median 6.219 (q25–q75 4.686–8.285)438nm — median 6.243 (q25–q75 4.668–8.319)443nm — median 6.269 (q25–q75 4.655–8.369)449nm — median 6.408 (q25–q75 4.784–8.536)455nm — median 6.625 (q25–q75 4.908–8.755)460nm — median 6.659 (q25–q75 4.976–8.825)466nm — median 6.742 (q25–q75 5.035–8.983)472nm — median 6.892 (q25–q75 5.196–9.218)477nm — median 7.096 (q25–q75 5.368–9.481)483nm — median 7.323 (q25–q75 5.526–9.77)488nm — median 7.49 (q25–q75 5.648–10.01)494nm — median 7.68 (q25–q75 5.817–10.21)500nm — median 7.929 (q25–q75 6.025–10.52)505nm — median 8.268 (q25–q75 6.235–10.94)511nm — median 8.738 (q25–q75 6.594–11.4)516nm — median 9.273 (q25–q75 6.928–11.86)522nm — median 9.738 (q25–q75 7.24–12.39)528nm — median 10.06 (q25–q75 7.526–12.88)533nm — median 10.23 (q25–q75 7.648–13.12)539nm — median 10.52 (q25–q75 7.882–13.46)544nm — median 10.87 (q25–q75 8.203–13.92)550nm — median 11.4 (q25–q75 8.612–14.58)556nm — median 11.84 (q25–q75 9.03–15.08)561nm — median 12.1 (q25–q75 9.252–15.26)567nm — median 12.3 (q25–q75 9.614–15.52)573nm — median 12.62 (q25–q75 9.944–15.91)578nm — median 12.96 (q25–q75 10.24–16.25)584nm — median 13.25 (q25–q75 10.57–16.68)589nm — median 13.5 (q25–q75 10.75–16.95)595nm — median 13.51 (q25–q75 10.77–17.03)601nm — median 13.3 (q25–q75 10.55–16.82)606nm — median 12.98 (q25–q75 10.31–16.62)612nm — median 12.88 (q25–q75 10.12–16.5)617nm — median 12.94 (q25–q75 10.15–16.64)623nm — median 13.05 (q25–q75 10.24–16.84)629nm — median 13.29 (q25–q75 10.44–17.23)634nm — median 13.49 (q25–q75 10.52–17.42)640nm — median 13.36 (q25–q75 10.35–17.28)645nm — median 12.85 (q25–q75 10.04–16.91)651nm — median 12.17 (q25–q75 9.413–16.27)657nm — median 11.37 (q25–q75 8.613–15.41)662nm — median 10.78 (q25–q75 7.952–14.83)668nm — median 10.31 (q25–q75 7.506–14.29)674nm — median 10.37 (q25–q75 7.568–14.39)679nm — median 10.92 (q25–q75 8.025–15.05)685nm — median 12.19 (q25–q75 9.195–16.63)690nm — median 13.89 (q25–q75 10.62–18.41)696nm — median 16.48 (q25–q75 12.91–21.46)702nm — median 19.83 (q25–q75 15.5–24.94)707nm — median 22.8 (q25–q75 17.98–28.19)713nm — median 25.9 (q25–q75 20.95–31.53)718nm — median 28.23 (q25–q75 23.11–33.68)724nm — median 30.52 (q25–q75 25.05–36.17)730nm — median 32.41 (q25–q75 26.82–38.48)735nm — median 33.97 (q25–q75 28.19–40.21)741nm — median 35.57 (q25–q75 29.71–41.89)746nm — median 36.84 (q25–q75 31–43.08)752nm — median 38.16 (q25–q75 32.24–44.68)758nm — median 39.44 (q25–q75 33.34–46.05)763nm — median 40.45 (q25–q75 34.4–47)769nm — median 41.52 (q25–q75 35.41–48.19)775nm — median 42.48 (q25–q75 36.34–49.14)780nm — median 43.39 (q25–q75 37.24–50.07)786nm — median 44.39 (q25–q75 38.08–50.96)791nm — median 45.07 (q25–q75 38.67–51.66)797nm — median 45.97 (q25–q75 39.61–52.41)803nm — median 46.88 (q25–q75 40.38–53.24)808nm — median 47.5 (q25–q75 41.11–53.87)814nm — median 48.42 (q25–q75 41.91–54.57)819nm — median 49.06 (q25–q75 42.54–55.14)825nm — median 49.91 (q25–q75 43.24–55.97)831nm — median 50.6 (q25–q75 43.93–56.67)836nm — median 51.11 (q25–q75 44.45–57.22)842nm — median 51.87 (q25–q75 45.12–57.93)847nm — median 52.37 (q25–q75 45.61–58.35)853nm — median 52.98 (q25–q75 46.09–58.95)859nm — median 53.52 (q25–q75 46.61–59.43)864nm — median 53.98 (q25–q75 47.08–59.93)870nm — median 54.37 (q25–q75 47.45–60.34)876nm — median 54.72 (q25–q75 47.94–60.8)881nm — median 55.1 (q25–q75 48.22–61.16)887nm — median 55.54 (q25–q75 48.58–61.62)892nm — median 55.9 (q25–q75 48.94–61.97)898nm — median 56.24 (q25–q75 49.26–62.28)904nm — median 56.72 (q25–q75 49.75–62.7)909nm — median 56.99 (q25–q75 50.09–63)915nm — median 57.35 (q25–q75 50.46–63.43)920nm — median 57.77 (q25–q75 50.77–63.77)926nm — median 57.97 (q25–q75 51.01–63.96)932nm — median 58.25 (q25–q75 51.22–64.23)937nm — median 58.15 (q25–q75 51.25–64.1)943nm — median 58.27 (q25–q75 51.48–64.38)948nm — median 58.89 (q25–q75 51.85–65.16)954nm — median 59.42 (q25–q75 52.24–65.59)960nm — median 59.73 (q25–q75 52.47–65.98)965nm — median 59.76 (q25–q75 52.78–66.09)971nm — median 60.01 (q25–q75 52.8–66.15)977nm — median 60.15 (q25–q75 52.96–66.31)982nm — median 60.26 (q25–q75 52.95–66.38)988nm — median 60.42 (q25–q75 53.14–66.51)993nm — median 60.62 (q25–q75 53.12–66.72)999nm — median 60.79 (q25–q75 53.48–66.83)1,005nm — median 60.86 (q25–q75 53.44–67.05)1,010nm — median 61.2 (q25–q75 53.76–66.93)1,016nm — median 61.19 (q25–q75 53.7–67.18)1,021nm — median 61.11 (q25–q75 53.64–67.17)1,027nm — median 61.21 (q25–q75 53.69–67.38)1,033nm — median 61.07 (q25–q75 53.78–67.42)1,038nm — median 61.45 (q25–q75 54.04–67.71)1,044nm — median 61.17 (q25–q75 53.97–67.51)1,049nm — median 61.67 (q25–q75 54.07–67.91)1,055nm — median 61.48 (q25–q75 54.17–67.54)1,061nm — median 61.3 (q25–q75 53.94–67.26)1,066nm — median 61.19 (q25–q75 54.05–67.64)1,072nm — median 60.72 (q25–q75 53.51–66.79)1,078nm — median 60.63 (q25–q75 53.26–66.49)1,083nm — median 59.33 (q25–q75 52.28–65.5)1,089nm — median 58.81 (q25–q75 51.85–64.82)1,094nm — median 57.13 (q25–q75 50.48–62.94)1,100nm — median 54.48 (q25–q75 48.01–60.06)

Sampling

Wavelengths781
Axis range320–1,100 nm
Mean spacing1 nm
Griduniform
Observations1,013

Signal & quality

Value range0 – 97.8
Mean range6.75 – 61.1
Mean level32.09
Area2.502e+04
PTP54.38
Noise RMS0.032927
SNR9.7e+02
SNR dB6e+01 dB
Dynamic range54.4
Smoothness0.8613
Saturated0.0%
X-outliers295

Integrity & artefacts

NaN ratio0.00%
Inf count0
Zero ratio0.10%
Spike count87,064
Spike rate11.03%
Jump count42,324
Jump rate5.36%
Clip fraction0.10%

Shape & reference

Baseline slope69.55
Curvature RMS0.83643
D1 RMS0.63665
RMS to mean5.6057
RMS p9516.436
SAM to mean0.070982
SAM p950.15332
Affine offset p958.4936
Affine gain p95 Δ0.36293
Affine residual p954.8848
Xcorr lag p950

Outliers & repeatability

PCA Q p95/median5.3
Hotelling T2 p95/median4.7
Mahalanobis H p95/median2.2
Repeat groups0

Dimensionality (PCA)

Effective rank2
PCs → 95% var3
PCs → 99% var5
Top-10 cum. var99.5%
Computed metric scores 29worst 1.00
FamilleMétrique calculéeValeurScoreNiveauInterprétation datasetCauses typiquesCalcul / scoring
Intégrité des donnéesNaN ratiointegrity.nan_ratio0%0.00faibleSpectre completErreur acquisition/exportcount(isnan(X)) / X.sizealert = min(1, nan_ratio / 0.05)
Intégrité des donnéesInf countintegrity.inf_count00.00faibleNormalCalculs invalidescount(isinf(X))alert = min(1, inf_count / 1)
Intégrité des donnéesZero ratiointegrity.zero_ratio0.0972%0.02faibleNormalExport, saturationcount(X == 0) / count(finite X)alert = min(1, zero_ratio / 0.05)
Amplitude globaleMean reflectanceamplitude.mean_reflectance32.0861.00fortValeur atypique: Trop clair / fond visible ou Trop sombreFond, géométriemean(X finite)alert reuses baseline/shape drift because absolute reflectance ranges are technology-dependent
Amplitude globaleArea under curveamplitude.area_under_curve250231.00fortValeur atypique: Différence d'éclairement ou NormalDistance sondetrapezoid(mean_spectrum, spectral_axis)alert reuses baseline/shape drift because area scale depends on axis and units
Amplitude globalePeak-to-peak (PTP)amplitude.peak_to_peak54.3820.00faibleVariabilité forteSaturationmax(mean_spectrum) - min(mean_spectrum)alert increases when dynamic range is abnormally flat
Amplitude globaleVarianceamplitude.variance536.360.00faibleNormal ou hétérogèneMauvais contactvar(X finite)alert increases when variance/dynamic range is abnormally flat
BruitNoise RMSnoise.noise_rms0.0329270.01faibleStableLampe, détecteurmedian MAD(second derivative) * 1.4826 / sqrt(6)alert = noise_rms / signal_scale, saturated at 5%
BruitSNRnoise.snr974.450.00faibleBon signalAcquisitionmean(abs(X)) / noise_rmsalert decreases with SNR dB; >=40 dB is treated as low alert
BruitBandwise SNRnoise.bandwise_snr_min8.03240.48moyenZone problématiqueDétecteurmin(abs(mean_spectrum) / local second-derivative noise)alert decreases with worst-band SNR dB; >=35 dB is treated as low alert
Artefacts locauxSpike countartefacts.spike_count87,0641.00fortArtefactsCosmic rays, splicecount robust outliers in second derivativealert follows spike_rate, saturated at 1%
Artefacts locauxSpike rateartefacts.spike_rate11%1.00fortSpectre suspectInterpolationspike_count / (n_samples * (n_features - 2))alert = min(1, spike_rate / 0.01)
Artefacts locauxJump countartefacts.jump_count42,3241.00fortRaccord détecteurSplicecount robust outliers in first derivativealert follows jump_rate, saturated at 1%
Artefacts locauxJump rateartefacts.jump_rate5.36%1.00fortProblème spectralCalibrationjump_count / (n_samples * (n_features - 1))alert = min(1, jump_rate / 0.01)
Artefacts locauxClip fractionartefacts.clip_fraction0.0973%0.10faibleNormalDétecteur saturéfraction of finite cells equal to repeated min/max extremaalert = min(1, clip_fraction / 0.01)
Forme spectraleBaseline slopeshape.baseline_slope69.551.00fortDériveÉclairementlinear slope of mean_spectrum over normalized axisalert = abs(slope / signal_scale), saturated at 0.5
Forme spectraleCurvature RMSshape.curvature_rms0.836431.00fortForme inhabituelleFond, splicemedian RMS(second derivative per spectrum)alert = curvature_rms / signal_scale, saturated at 1%
Forme spectraleD1 RMSshape.d1_rms0.636650.23faiblePlatBiologie ou artefactmedian RMS(first derivative per spectrum)alert = d1_rms / signal_scale, saturated at 5%
Outliers multivariésPCA Q (SPE)outliers.pca_q_ratio5.29410.66moyenSpectre atypiqueArtefact, mélangep95(Q/SPE residual) / median(Q/SPE residual)alert = min(1, pca_q_ratio / 8)
Outliers multivariésHotelling T²outliers.hotelling_t2_ratio4.71150.59moyenExtrême mais cohérentVariabilité naturellep95(Hotelling T2) / median(Hotelling T2)alert = min(1, hotelling_t2_ratio / 8)
Outliers multivariésMahalanobis Houtliers.mahalanobis_h_ratio2.17060.54moyenOutlier globalDomaine différentp95(sqrt(T2)) / median(sqrt(T2))alert = min(1, mahalanobis_h_ratio / 4)
Comparaison à référenceRMS to mean spectrumreference.rms_to_mean_spectrum_p9516.4361.00fortSpectre différentDomain shiftp95 RMS distance to dataset mean spectrumalert = RMS_p95 / signal_scale, saturated at 25%
Comparaison à référenceSpectral Angle Mapper (SAM)reference.sam_to_mean_spectrum_p950.153320.44moyenForme différenteFond, géométriep95 spectral angle to dataset mean spectrumalert = min(1, SAM_p95 / 0.35 rad)
RépétabilitéRMS intra-IDrepeatability.rms_intra_id0.00faibleStablePositionnementmedian RMS distance to repeated-sample centroidalert = RMS_intra_ID / signal_scale, saturated at 10%
RépétabilitéSAM intra-IDrepeatability.sam_intra_id0.00faibleStableAcquisitionmedian SAM to repeated-sample centroidalert = min(1, SAM_intra_ID / 0.15 rad)
RépétabilitéCV intra-IDrepeatability.cv_intra_id0.00faibleStableOpérateurmedian within-ID band CValert = min(1, CV_intra_ID / 0.25)
Structure du datasetPCA score densitystructure.pca_score_density0.0336620.83fortSous-populationsLots différents1 / median kNN distance in PCA score spacealert follows density_cv/profile structure complexity, not raw density alone
Structure du datasetLocal Outlier Factor (LOF)structure.local_outlier_factor_p952.48120.74fortSpectre isoléCas raresp95 approximate LOF from PCA-score kNN distancesalert = min(1, max(0, LOF_p95 - 1) / 2)
Structure du datasetIsolation Forest scorestructure.isolation_forest_score_p950.549940.83fortSpectre atypiqueDiverses causesp95 IsolationForest anomaly score on PCA scoresalert follows structure complexity; raw score is implementation-dependent
X PCA score plot-2,000-1,00001,0002,000-1,000-5000500PC1 -142.5 · PC2 -88.64PC1 37.39 · PC2 -21.07PC1 -236.9 · PC2 -45.63PC1 157 · PC2 -21.45PC1 128.3 · PC2 -5.822PC1 145.9 · PC2 -14.92PC1 -16.31 · PC2 -20.35PC1 -108 · PC2 -68.54PC1 64.23 · PC2 3.301PC1 99.07 · PC2 42.97PC1 -63.4 · PC2 -17.73PC1 12.97 · PC2 -16.28PC1 38.03 · PC2 14.38PC1 -80.52 · PC2 -90.08PC1 -169.1 · PC2 -52.73PC1 133.7 · PC2 -28.36PC1 -102.5 · PC2 -10.77PC1 -29.85 · PC2 17.59PC1 -357.7 · PC2 -82.8PC1 146.3 · PC2 15.14PC1 235.2 · PC2 -29.5PC1 285.7 · PC2 -61.58PC1 48.82 · PC2 46.99PC1 108.8 · PC2 -17.54PC1 -201.5 · PC2 -68.43PC1 28.57 · PC2 -1.262PC1 -57.48 · PC2 8.397PC1 81.59 · PC2 -31.89PC1 424 · PC2 -49.19PC1 281.4 · PC2 -20.44PC1 86.22 · PC2 0.8815PC1 -96.44 · PC2 23.46PC1 223.2 · PC2 -56.31PC1 173.1 · PC2 -33.43PC1 98.45 · PC2 -13.4PC1 132.8 · PC2 10.6PC1 -38.51 · PC2 33.38PC1 -59.72 · PC2 -34.12PC1 -170 · PC2 -79.01PC1 -144.7 · PC2 41.03PC1 -118.5 · PC2 -25.93PC1 -81.82 · PC2 17.03PC1 -259.3 · PC2 -14.3PC1 75.75 · PC2 -97.41PC1 202 · PC2 -40.08PC1 81.64 · PC2 33.41PC1 -207.6 · PC2 55.48PC1 147.5 · PC2 -20.89PC1 113 · PC2 24.16PC1 -70.76 · PC2 10.17PC1 89.57 · PC2 22.2PC1 111.2 · PC2 37.23PC1 487.8 · PC2 -76.57PC1 -69.8 · PC2 81.32PC1 -195.2 · PC2 25.36PC1 -15.99 · PC2 5.867PC1 150 · PC2 -28.74PC1 -183.4 · PC2 52.59PC1 -148.4 · PC2 108.3PC1 85.57 · PC2 34.48PC1 212.5 · PC2 48.43PC1 -124 · PC2 50.96PC1 -41.44 · PC2 106.3PC1 106.8 · PC2 36.1PC1 141.4 · PC2 36.6PC1 169.6 · PC2 12.47PC1 68.8 · PC2 38.82PC1 -172.6 · PC2 113.9PC1 -230 · PC2 166.2PC1 -177.1 · PC2 43.42PC1 -94.08 · PC2 68.56PC1 78.39 · PC2 104.7PC1 187.4 · PC2 70.22PC1 -21.61 · PC2 22.06PC1 80.69 · PC2 94.48PC1 154 · PC2 74.31PC1 -141.2 · PC2 -13.86PC1 161.7 · PC2 1.807PC1 -100.8 · PC2 -31.12PC1 -137.9 · PC2 23.5PC1 54.91 · PC2 -11.6PC1 234.1 · PC2 13.02PC1 175.8 · PC2 8.482PC1 -15.71 · PC2 82.6PC1 -11.13 · PC2 81.93PC1 -121.3 · PC2 94.49PC1 169.6 · PC2 68.69PC1 -135.7 · PC2 116.4PC1 -245.5 · PC2 6.276PC1 -177.2 · PC2 93.16PC1 22.52 · PC2 49.55PC1 -39.16 · PC2 100.5PC1 -111 · PC2 80.83PC1 56.95 · PC2 59.02PC1 -161.1 · PC2 100.5PC1 -158.2 · PC2 -1.746PC1 -274.4 · PC2 175PC1 -352.9 · PC2 21.89PC1 -11.41 · PC2 124.8PC1 -121.3 · PC2 -5.996PC1 92.28 · PC2 -11.91PC1 -370.6 · PC2 58.38PC1 -150.3 · PC2 55.04PC1 -501.4 · PC2 -79.13PC1 -306.1 · PC2 30.94PC1 -31.1 · PC2 92.03PC1 -273.3 · PC2 18.6PC1 -250.6 · PC2 28.84PC1 -92.14 · PC2 18.64PC1 -35.02 · PC2 15.4PC1 -154.3 · PC2 1.116PC1 -15.54 · PC2 70.61PC1 -32.2 · PC2 -74.98PC1 217.5 · PC2 -70.98PC1 -193 · PC2 -174.9PC1 171.3 · PC2 -54.65PC1 -250.2 · PC2 17.18PC1 -2.516 · PC2 -65.86PC1 200.3 · PC2 -41.93PC1 -12.03 · PC2 -19.68PC1 14.12 · PC2 99.44PC1 -379.8 · PC2 -373.3PC1 190 · PC2 -97.68PC1 88.47 · PC2 76.64PC1 -50.1 · PC2 -77.22PC1 -51.29 · PC2 114.4PC1 27.81 · PC2 -38.34PC1 314.7 · PC2 26.97PC1 82.87 · PC2 -54.53PC1 102.1 · PC2 -93.78PC1 56.88 · PC2 58.12PC1 172.2 · PC2 -58.16PC1 14.15 · PC2 11.81PC1 366.5 · PC2 -93.42PC1 254.9 · PC2 -41.78PC1 316.5 · PC2 29.11PC1 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· PC2 -67.5PC1 4.313 · PC2 -70.49PC1 -130.9 · PC2 -190.5PC1 289.4 · PC2 -83.17PC1 143.1 · PC2 -93.48PC1 20.47 · PC2 -117.1PC1 152.1 · PC2 -93.4PC1 38.09 · PC2 -92.2PC1 182.7 · PC2 -168.8PC1 229 · PC2 -138.3PC1 149.3 · PC2 -205.9PC1 104.4 · PC2 -144.2PC1 -63.68 · PC2 -174.4PC1 68.98 · PC2 -165.9PC1 117.3 · PC2 -119.5PC1 367.6 · PC2 -43.08PC1 79 · PC2 -157.9PC1 111.4 · PC2 -120.2PC1 211.5 · PC2 -121.7PC1 257.4 · PC2 -78.76PC1 327.3 · PC2 -100.6PC1 280.5 · PC2 -99.87PC1 123.5 · PC2 -128.5PC1 319 · PC2 -115.6PC1 346.4 · PC2 -93.29PC1 326.7 · PC2 -42.91PC1 252.5 · PC2 -104.8PC1 269 · PC2 -129.9PC1 292.5 · PC2 -108PC1 379.7 · PC2 -68.64PC1 333.8 · PC2 -85.16PC1 385.9 · PC2 -99.89PC1 -179.5 · PC2 -81.2PC1 -302.3 · PC2 -126.5PC1 -20.5 · PC2 -119.3PC1 -225.7 · PC2 -74.97PC1 -131.6 · PC2 -72.02PC1 -340.5 · PC2 -36.27PC1 -367.5 · PC2 -41.01PC1 -313.6 · PC2 -42.4PC1 -361.7 · PC2 -70.82PC1 -315 · PC2 -162PC1 -88.67 · PC2 -78.27PC1 -187.6 · PC2 -104.8PC1 -33.03 · PC2 -90.38PC1 -400.6 · PC2 -142.8PC1 -389.6 · PC2 -47.26PC1 -275.3 · PC2 -101.4PC1 -528 · PC2 -158.8PC1 -58.53 · PC2 -118.8PC1 -252.8 · PC2 -23.64PC1 -362.5 · PC2 -105.8PC1 -435.5 · PC2 -164.2PC1 -336.1 · PC2 -130PC1 -319.3 · PC2 -26.82PC1 -164.5 · PC2 -147.6PC1 -343.1 · PC2 -78.73PC1 -145.2 · PC2 -104.1PC1 -304.8 · PC2 -100.1PC1 -351.8 · PC2 -26.17PC1 -302.5 · PC2 -113.6PC1 -409.3 · PC2 -102.3PC1 -251.4 · PC2 -98.01PC1 -284.9 · PC2 -98.97PC1 -220.1 · PC2 -116.2PC1 -250.7 · PC2 -80.38PC1 -256.6 · PC2 -74.03PC1 -76.73 · PC2 -48.55PC1 -350.4 · PC2 -164.1PC1 -226 · PC2 -6.969PC1 -43.61 · PC2 54.56PC1 -115.7 · PC2 46.07PC1 59.24 · PC2 -42.87PC1 -102 · PC2 20.01PC1 6.767 · PC2 -29.06PC1 -38.95 · PC2 95.57PC1 -378.8 · PC2 -48.35PC1 -188.6 · PC2 -42.79PC1 -222.5 · PC2 22PC1 -72.21 · PC2 114.8PC1 106.1 · PC2 -96.11PC1 -202.5 · PC2 78.48PC1 103.1 · PC2 -9.952PC1 -46.54 · PC2 100.6PC1 -24.35 · PC2 33.92PC1 -399.7 · PC2 -68.87PC1 -315.7 · PC2 -25.78PC1 -130.2 · PC2 4.422PC1 15.26 · PC2 16.22PC1 145.4 · PC2 -2.028PC1 -156.1 · PC2 47.06PC1 -81.97 · PC2 127.7PC1 83.64 · PC2 53.57PC1 -108.6 · PC2 82.1PC1 100.3 · PC2 80.53PC1 -97.2 · PC2 8.816PC1 40.4 · PC2 9.324PC1 -152.7 · PC2 40.77PC1 -53.93 · PC2 -55.42PC1 -175.3 · PC2 36.49PC1 -173.7 · PC2 7.265PC1 -164.2 · PC2 -50.29PC1 -67.93 · PC2 -8.582PC1 -96.46 · PC2 20.67PC1 -91.32 · PC2 54.72PC1 -243.8 · PC2 -60.92PC1 -9.577 · PC2 18.78PC1 -52.01 · PC2 104PC1 317.3 · PC2 -24.56PC1 -125.8 · PC2 16.01PC1 128.1 · PC2 27.36PC1 25.67 · PC2 32.83PC1 -212.1 · PC2 20.11PC1 -254.8 · PC2 -16.76PC1 123 · PC2 63.9PC1 104.2 · PC2 36.07PC1 71.24 · PC2 2.128PC1 -101.5 · PC2 48.64PC1 -297.4 · PC2 -74.54PC1 -115.7 · PC2 -15.19PC1 -148.7 · PC2 -53.82PC1 -11 · PC2 7.084PC1 124.1 · PC2 -5.511PC1 -105.8 · PC2 73.06PC1 -243.4 · PC2 -0.288PC1 -276.2 · PC2 -4.841PC1 -143.1 · PC2 5.243PC1 3.337 · PC2 21.05PC1 -497.9 · PC2 -199.7PC1 -333.8 · PC2 -206.6PC1 -246.3 · PC2 -51.96PC1 51.03 · PC2 -122.5PC1 -137.2 · PC2 -118.2PC1 -140.5 · PC2 -151.5PC1 -416.8 · PC2 -167.8PC1 -170.4 · PC2 -250PC1 -372.7 · PC2 -162.6PC1 -189.5 · PC2 -191PC1 -284.7 · PC2 -122.9PC1 -90.14 · PC2 -235.8PC1 -471.2 · PC2 -201.5PC1 -615 · PC2 -74.38PC1 -689.8 · PC2 -212.9PC1 -259.3 · PC2 -183.1PC1 -739 · PC2 -319.4PC1 -787.7 · PC2 -348.9PC1 -675.5 · PC2 -166.5PC1 -495.9 · PC2 -255.6PC1 -412.3 · PC2 -188.9PC1 -501.2 · PC2 -167PC1 -424.1 · PC2 -250.4PC1 -494.5 · PC2 -226.6PC1 -473.9 · PC2 -94.98PC1 -232.9 · PC2 -127.4PC1 -407.8 · PC2 -170.1PC1 (81.5%)PC2 (12.4%)800 scores
PCA explained variance0%25%50%75%100%PC1: 81.1% (cumulative 81.1%)1PC2: 12.6% (cumulative 93.7%)2PC3: 3.2% (cumulative 96.9%)3PC4: 2.1% (cumulative 98.9%)4PC5: 0.2% (cumulative 99.2%)5PC6: 0.1% (cumulative 99.3%)6PC7: 0.1% (cumulative 99.4%)7PC8: 0.1% (cumulative 99.4%)8PC9: 0.0% (cumulative 99.5%)9PC10: 0.0% (cumulative 99.5%)10cumulative explained variancePC variancecumulativeprincipal component · cumulative (dashed)
X-Y spectral correlation 10
X · LeafNumber spectral correlation-1-0.500.51absolute correlation envelopesigned correlationabsolute correlation2004006008001,0001,200|r|signed raxis · Pearson correlation scale
X · Count spectral correlation-1-0.500.51absolute correlation envelopesigned correlationabsolute correlation2004006008001,0001,200|r|signed raxis · Pearson correlation scale
X · LeafArea_cm_2 spectral correlation-1-0.500.51absolute correlation envelopesigned correlationabsolute correlation2004006008001,0001,200|r|signed raxis · Pearson correlation scale
Targetmax |r|axis @ maxmean |r||r| ≥ .5
LeafNumber0.1591,0940.1070.0%
Count0.2339070.1320.0%
LeafArea_cm_20.3461,0900.2180.0%
wetWeight_g0.2951,0900.1720.0%
dryWeight_g0.3441,0280.2180.0%
N0.6956840.22611.1%
C0.4216830.08610.0%
H0.4536840.1180.0%
C/N0.7166830.23312.3%
C/H0.2591,0900.09430.0%

Metric interpretation reference

Metric catalog 29
FamilleMétriqueCe qu’elle détecteForte valeur =Faible valeur =Causes typiquesCalcul / score
Intégrité des donnéesNaN ratioDonnées manquantesSpectre corrompuSpectre completErreur acquisition/exportcount(isnan(X)) / X.sizealert = min(1, nan_ratio / 0.05)
Intégrité des donnéesInf countValeurs infiniesCorruptionNormalCalculs invalidescount(isinf(X))alert = min(1, inf_count / 1)
Intégrité des donnéesZero ratioColonnes ou cellules nullesSpectre tronquéNormalExport, saturationcount(X == 0) / count(finite X)alert = min(1, zero_ratio / 0.05)
Amplitude globaleMean reflectanceNiveau moyenTrop clair / fond visibleTrop sombreFond, géométriemean(X finite)alert reuses baseline/shape drift because absolute reflectance ranges are technology-dependent
Amplitude globaleArea under curveIntensité globaleDifférence d'éclairementNormalDistance sondetrapezoid(mean_spectrum, spectral_axis)alert reuses baseline/shape drift because area scale depends on axis and units
Amplitude globalePeak-to-peak (PTP)DynamiqueVariabilité forteSpectre platSaturationmax(mean_spectrum) - min(mean_spectrum)alert increases when dynamic range is abnormally flat
Amplitude globaleVarianceVariabilité spectraleNormal ou hétérogèneSpectre platMauvais contactvar(X finite)alert increases when variance/dynamic range is abnormally flat
BruitNoise RMSBruit haute fréquenceBruitéStableLampe, détecteurmedian MAD(second derivative) * 1.4826 / sqrt(6)alert = noise_rms / signal_scale, saturated at 5%
BruitSNRQualité signalBon signalMauvais signalAcquisitionmean(abs(X)) / noise_rmsalert decreases with SNR dB; >=40 dB is treated as low alert
BruitBandwise SNRBruit localiséZone fiableZone problématiqueDétecteurmin(abs(mean_spectrum) / local second-derivative noise)alert decreases with worst-band SNR dB; >=35 dB is treated as low alert
Artefacts locauxSpike countPics étroitsArtefactsSpectre propreCosmic rays, splicecount robust outliers in second derivativealert follows spike_rate, saturated at 1%
Artefacts locauxSpike rateDensité de picsSpectre suspectNormalInterpolationspike_count / (n_samples * (n_features - 2))alert = min(1, spike_rate / 0.01)
Artefacts locauxJump countDiscontinuitésRaccord détecteurContinuSplicecount robust outliers in first derivativealert follows jump_rate, saturated at 1%
Artefacts locauxJump rateFréquence de sautsProblème spectralNormalCalibrationjump_count / (n_samples * (n_features - 1))alert = min(1, jump_rate / 0.01)
Artefacts locauxClip fractionSaturationClippingNormalDétecteur saturéfraction of finite cells equal to repeated min/max extremaalert = min(1, clip_fraction / 0.01)
Forme spectraleBaseline slopePente globaleDériveStableÉclairementlinear slope of mean_spectrum over normalized axisalert = abs(slope / signal_scale), saturated at 0.5
Forme spectraleCurvature RMSCourbureForme inhabituelleLisseFond, splicemedian RMS(second derivative per spectrum)alert = curvature_rms / signal_scale, saturated at 1%
Forme spectraleD1 RMSVariabilité localeSpectre structuréPlatBiologie ou artefactmedian RMS(first derivative per spectrum)alert = d1_rms / signal_scale, saturated at 5%
Outliers multivariésPCA Q (SPE)Non expliqué par PCASpectre atypiqueConformeArtefact, mélangep95(Q/SPE residual) / median(Q/SPE residual)alert = min(1, pca_q_ratio / 8)
Outliers multivariésHotelling T²Extrême dans PCAExtrême mais cohérentCentralVariabilité naturellep95(Hotelling T2) / median(Hotelling T2)alert = min(1, hotelling_t2_ratio / 8)
Outliers multivariésMahalanobis HDistance au nuageOutlier globalPopulation normaleDomaine différentp95(sqrt(T2)) / median(sqrt(T2))alert = min(1, mahalanobis_h_ratio / 4)
Comparaison à référenceRMS to mean spectrumDistance moyenneSpectre différentTypiqueDomain shiftp95 RMS distance to dataset mean spectrumalert = RMS_p95 / signal_scale, saturated at 25%
Comparaison à référenceSpectral Angle Mapper (SAM)Différence de formeForme différenteSimilaireFond, géométriep95 spectral angle to dataset mean spectrumalert = min(1, SAM_p95 / 0.35 rad)
RépétabilitéRMS intra-IDReproductibilitéMauvaise répétabilitéStablePositionnementmedian RMS distance to repeated-sample centroidalert = RMS_intra_ID / signal_scale, saturated at 10%
RépétabilitéSAM intra-IDVariation de formeInstableStableAcquisitionmedian SAM to repeated-sample centroidalert = min(1, SAM_intra_ID / 0.15 rad)
RépétabilitéCV intra-IDVariabilité interneMauvais contrôleStableOpérateurmedian within-ID band CValert = min(1, CV_intra_ID / 0.25)
Structure du datasetPCA score densityClustersSous-populationsHomogèneLots différents1 / median kNN distance in PCA score spacealert follows density_cv/profile structure complexity, not raw density alone
Structure du datasetLocal Outlier Factor (LOF)Anomalie localeSpectre isoléPopulation normaleCas raresp95 approximate LOF from PCA-score kNN distancesalert = min(1, max(0, LOF_p95 - 1) / 2)
Structure du datasetIsolation Forest scoreAnomalie globaleSpectre atypiqueNormalDiverses causesp95 IsolationForest anomaly score on PCA scoresalert follows structure complexity; raw score is implementation-dependent
Technology-specific extensions
TechnologieAdaptations / métriquesAnomalies cibléesCommentaire pratique
UV-Vis 300-1000 nmBaseline, pente globale, dérive aux bords 300-350 et 900-1000; métriques par zonesLumière parasite, mauvais blanc, saturation, faible signal aux extrémitésLes bords sont souvent instables; calculer aussi des scores edge/middle.
UV-Vis 300-1000 nmSaturation / clipping proche absorbance max ou réflectance maxSignal écrêtéTrès important si absorption forte.
UV-Vis 300-1000 nmRed-edge, position de maximum, ratios de bandes si végétalDécalage biologique ou artefact optiqueAide à distinguer changement réel et problème d'acquisition.
UV-Vis 300-1000 nmSmoothness / roughness indexBruit haute fréquenceSouvent plus informatif que le SNR seul.
MIR / ATR-FTIRATR contact quality index: intensité globale, aire totale, profondeur des bandes clésMauvais contact cristal-échantillonCrucial: beaucoup d'anomalies viennent du contact ATR.
MIR / ATR-FTIRCO2 / H2O atmospheric bandsMauvaise correction atmosphériquePics parasites fréquents.
MIR / ATR-FTIRBaseline curvature / rubber-band residualDiffusion, contact, dérive baselineTrès utile avant PCA.
MIR / ATR-FTIRPeak position shiftMauvais alignement spectral / calibrationImportant en FTIR car de petits shifts comptent.
MIR / ATR-FTIRBand area ratios sur bandes connuesSpectre chimiquement incohérentÀ adapter par matrice: polysaccharides, protéines, lipides, etc.
HS-MSTotal Ion Current (TIC), Base Peak Intensity (BPI)Injection faible, ionisation instableÉquivalent MS du niveau global spectral.
HS-MSNombre de pics détectésSpectre pauvre ou trop bruitéTrop peu = mauvais signal; trop = bruit/contamination.
HS-MSMass accuracy / m/z driftProblème calibration masseFondamental en HRMS.
HS-MSRetention time drift si LC/GC-MSDérive chromatographiqueÀ suivre sur standards/QC pools.
HS-MSBlank contamination scoreContaminants / carry-overComparer échantillons vs blancs.
HS-MSInternal standard CVVariabilité instrumentaleTrès robuste si standards disponibles.
HS-MSMissingness par featureInstabilité de détectionCrucial pour filtrer les variables.
Avec répétitionsRMS intra-échantillonRépétabilité globaleApplicable à toutes les technologies.
Avec répétitionsSAM / corrélation intra-échantillonRépétabilité de formeTrès utile pour spectres.
Avec répétitionsCV intra-échantillon par bande / featureRépétabilité localeDétecte les zones instables.
Avec répétitionsICC ou variance componentsPart variance échantillon vs techniqueTrès utile si plusieurs répétitions par sample.
Avec répétitionsDistance au centroïde intra-IDRépétition aberrantePermet de flagger la mauvaise répétition plutôt que le sample entier.
Bug-hunting / supervised audits
Famille de bug potentielMéthodes à ajouterCe que ça détecteÉtat dans l’explorateur
Shift spectral globalCorrélation spectre moyen inter-dataset, DTW, cross-correlation, comparaison positions de picsDécalage en longueur d'onde, mauvais alignement, interpolation différentePartiellement calculé: cross-correlation lag et dispersion des positions de pics vs spectre moyen.
Baseline / offset / gainRégression chaque spectre vs spectre moyen: x = a + b ref + residual; suivi de a, b, RMS résiduelOffset additif, effet multiplicatif, dérive de baselineCalculé dans reference.affine_*.
Mélange de lignes / mauvais appariement X-M-YVérification index, hash des lignes, duplication ID, distance spectrale intra-ID, labels incohérentsLignes mélangées, metadata mal alignées, Y attribué au mauvais spectrePartiellement couvert par répétabilité intra-ID; checks index/hash à ajouter au pipeline canonical.
Fuite d'information / répétitions mal splitéesGroupKFold par sample_id vs StratifiedKFold random; audit des partitions par sample_idPerformance artificiellement bonne due aux répétitionsNécessite splits et benchmark modèle; non calculé par la carte descriptive.
Label bugsÉchantillons proches en X mais Y différents, confident learning, erreurs systématiques FP/FNY inversés, erreurs de saisie, classes ambiguësNécessite Y et/ou modèle; recommandé pour l'explorateur supervisé.
Sous-domaines cachésPCA/UMAP/t-SNE + clustering non supervisé + association avec dataset/Y/date/operatorLots, campagnes, sondes, backgrounds non renseignésPartiellement calculé par structure PCA/LOF; UMAP/t-SNE hors carte statique.
Artefacts localisés inconnusCarte wavelength x dataset: différence moyenne, différence variance, KS par longueur d'ondeRégions spectrales anormales non anticipéesÀ calculer au niveau banque quand plusieurs datasets partagent un axe spectral.
Ruptures instrumentalesDiscontinuités dans dérivées, changepoint detectionSplice, raccord détecteur, saut local non prévuCalculé par jump/spike rates; changepoint plus avancé à ajouter.
Mélange / contamination spectraleNMF / unmixing / reconstruction par convex hullComposante externe: fond, plastique, solNon calculé automatiquement; nécessite hypothèses de composants ou grande bibliothèque.
Features instables mais prédictivesImportance modèle vs instabilité QC par variableModèle qui apprend un artefact plutôt qu'un signal biologiqueNécessite modèle supervisé; recommandé pour rapports de benchmark.

Variables

Targets 11

LeafNumber

target · numeric
LeafNumber distribution0501001 – 1.625: 761.625 – 2.25: 762.25 – 2.875: 02.875 – 3.5: 763.5 – 4.125: 764.125 – 4.75: 04.75 – 5.375: 765.375 – 6: 06 – 6.625: 766.625 – 7.25: 767.25 – 7.875: 07.875 – 8.5: 768.5 – 9.125: 739.125 – 9.75: 09.75 – 10.38: 7310.38 – 11: 011 – 11.62: 5111.62 – 12.25: 5112.25 – 12.88: 012.88 – 13.5: 5113.5 – 14.12: 5114.12 – 14.75: 014.75 – 15.38: 5015.38 – 16: 105101520
n / missing1,013 / 4
Mean ± SD7.373 ± 4.17
Median7
Range1 – 16
CV0.565
Skew / kurtosis0.19 / -1.1
Normal?no

Species

target · categorical
Species classesBeechBeech: 954954PoplarPoplar: 4444
n / missing1,013 / 15
Classes2
Balance (entropy)0.26
Imbalance ratio2e+01
Top classBeech (954)

Count

target · numeric
Count distribution05001,00010 – 10.21: 4410.21 – 10.42: 010.42 – 10.62: 010.62 – 10.83: 010.83 – 11.04: 011.04 – 11.25: 011.25 – 11.46: 011.46 – 11.67: 011.67 – 11.88: 011.88 – 12.08: 012.08 – 12.29: 012.29 – 12.5: 012.5 – 12.71: 012.71 – 12.92: 012.92 – 13.12: 013.12 – 13.33: 013.33 – 13.54: 013.54 – 13.75: 013.75 – 13.96: 013.96 – 14.17: 014.17 – 14.38: 014.38 – 14.58: 014.58 – 14.79: 014.79 – 15: 954102050100
n / missing1,013 / 15
Mean ± SD14.78 ± 1.03
Median15
Range10 – 15
CV0.0695
Skew / kurtosis-4.4 / 18
Normal?no

LeafArea_cm_2

target · numeric
LeafArea_cm_2 distribution0200400600430 – 451: 151451 – 472.1: 0472.1 – 493.2: 0493.2 – 514.2: 0514.2 – 535.3: 403535.3 – 556.3: 0556.3 – 577.4: 0577.4 – 598.5: 400598.5 – 619.5: 0619.5 – 640.6: 0640.6 – 661.7: 0661.7 – 682.7: 0682.7 – 703.8: 0703.8 – 724.9: 0724.9 – 745.9: 0745.9 – 767: 0767 – 788: 0788 – 809.1: 0809.1 – 830.2: 0830.2 – 851.2: 0851.2 – 872.3: 0872.3 – 893.4: 0893.4 – 914.4: 0914.4 – 935.5: 441002005001,000
n / missing1,013 / 15
Mean ± SD556.2 ± 94.7
Median530.4
Range430 – 935.5
CV0.17
Skew / kurtosis2.6 / 8.8
Normal?no

wetWeight_g

target · numeric
wetWeight_g distribution02004001.7 – 1.965: 1511.965 – 2.229: 02.229 – 2.494: 2002.494 – 2.758: 2032.758 – 3.023: 4003.023 – 3.287: 03.287 – 3.552: 03.552 – 3.817: 03.817 – 4.081: 04.081 – 4.346: 04.346 – 4.61: 04.61 – 4.875: 04.875 – 5.14: 05.14 – 5.404: 05.404 – 5.669: 05.669 – 5.933: 05.933 – 6.198: 06.198 – 6.463: 06.463 – 6.727: 06.727 – 6.992: 06.992 – 7.256: 07.256 – 7.521: 07.521 – 7.785: 07.785 – 8.05: 440246810
n / missing1,013 / 15
Mean ± SD2.824 ± 1.18
Median2.64
Range1.7 – 8.05
CV0.419
Skew / kurtosis3.7 / 14
Normal?no

dryWeight_g

target · numeric
dryWeight_g distribution02004006001.06 – 1.12: 301.12 – 1.18: 1211.18 – 1.24: 01.24 – 1.3: 01.3 – 1.36: 2001.36 – 1.42: 2001.42 – 1.48: 4031.48 – 1.54: 01.54 – 1.6: 01.6 – 1.66: 01.66 – 1.72: 01.72 – 1.78: 01.78 – 1.84: 01.84 – 1.9: 01.9 – 1.96: 01.96 – 2.02: 02.02 – 2.08: 02.08 – 2.14: 02.14 – 2.2: 02.2 – 2.26: 02.26 – 2.32: 02.32 – 2.38: 02.38 – 2.44: 02.44 – 2.5: 4412510
n / missing1,013 / 15
Mean ± SD1.397 ± 0.257
Median1.39
Range1.06 – 2.5
CV0.184
Skew / kurtosis3.3 / 12
Normal?no

N

target · numeric
N distribution01002003000.95 – 1.027: 441.027 – 1.103: 301.103 – 1.18: 01.18 – 1.257: 01.257 – 1.333: 1211.333 – 1.41: 01.41 – 1.487: 01.487 – 1.563: 01.563 – 1.64: 01.64 – 1.717: 01.717 – 1.793: 01.793 – 1.87: 01.87 – 1.947: 01.947 – 2.023: 02.023 – 2.1: 02.1 – 2.177: 02.177 – 2.253: 02.253 – 2.33: 2032.33 – 2.407: 02.407 – 2.483: 2002.483 – 2.56: 02.56 – 2.637: 02.637 – 2.713: 2002.713 – 2.79: 2000.10.20.512510
n / missing1,013 / 15
Mean ± SD2.297 ± 0.566
Median2.46
Range0.95 – 2.79
CV0.246
Skew / kurtosis-1.3 / 0.22
Normal?no

C

target · numeric
C distribution020040060041.66 – 42: 4442 – 42.34: 042.34 – 42.68: 042.68 – 43.02: 043.02 – 43.36: 043.36 – 43.7: 043.7 – 44.05: 044.05 – 44.39: 044.39 – 44.73: 044.73 – 45.07: 045.07 – 45.41: 045.41 – 45.75: 3045.75 – 46.09: 046.09 – 46.43: 046.43 – 46.77: 046.77 – 47.11: 12147.11 – 47.45: 047.45 – 47.8: 40347.8 – 48.14: 048.14 – 48.48: 048.48 – 48.82: 048.82 – 49.16: 20049.16 – 49.5: 049.5 – 49.84: 20040.042.545.047.550.0
n / missing1,013 / 15
Mean ± SD47.92 ± 1.74
Median47.59
Range41.66 – 49.84
CV0.0363
Skew / kurtosis-1.8 / 4.9
Normal?no

H

target · numeric
H distribution01002003006.023 – 6.056: 446.056 – 6.09: 06.09 – 6.123: 06.123 – 6.157: 306.157 – 6.191: 06.191 – 6.224: 06.224 – 6.257: 06.257 – 6.291: 06.291 – 6.324: 1216.324 – 6.358: 2006.358 – 6.391: 06.391 – 6.425: 06.425 – 6.458: 06.458 – 6.492: 2036.492 – 6.526: 06.526 – 6.559: 06.559 – 6.592: 06.592 – 6.626: 2006.626 – 6.659: 06.659 – 6.693: 06.693 – 6.726: 06.726 – 6.76: 06.76 – 6.793: 06.793 – 6.827: 2006.006.256.506.757.00
n / missing1,013 / 15
Mean ± SD6.497 ± 0.217
Median6.46
Range6.023 – 6.827
CV0.0334
Skew / kurtosis0.019 / -0.58
Normal?no

C/N

target · numeric
C/N distribution020040017.88 – 18.96: 40018.96 – 20.04: 20020.04 – 21.12: 20321.12 – 22.19: 022.19 – 23.27: 023.27 – 24.35: 024.35 – 25.43: 025.43 – 26.51: 026.51 – 27.59: 027.59 – 28.67: 028.67 – 29.75: 029.75 – 30.83: 030.83 – 31.91: 031.91 – 32.99: 032.99 – 34.07: 034.07 – 35.15: 035.15 – 36.23: 12136.23 – 37.31: 037.31 – 38.39: 038.39 – 39.47: 039.47 – 40.55: 040.55 – 41.62: 3041.62 – 42.7: 042.7 – 43.78: 44102050100
n / missing1,013 / 15
Mean ± SD22.77 ± 7.87
Median19.26
Range17.88 – 43.78
CV0.346
Skew / kurtosis1.7 / 1.1
Normal?no

C/H

target · numeric
C/H distribution02004006.917 – 6.942: 446.942 – 6.968: 06.968 – 6.994: 06.994 – 7.019: 07.019 – 7.045: 07.045 – 7.071: 07.071 – 7.096: 07.096 – 7.122: 07.122 – 7.147: 07.147 – 7.173: 07.173 – 7.199: 2007.199 – 7.224: 07.224 – 7.25: 07.25 – 7.276: 07.276 – 7.301: 07.301 – 7.327: 07.327 – 7.352: 07.352 – 7.378: 2037.378 – 7.404: 07.404 – 7.429: 307.429 – 7.455: 07.455 – 7.481: 3217.481 – 7.506: 07.506 – 7.532: 2006.87.07.27.47.6
n / missing1,013 / 15
Mean ± SD7.377 ± 0.157
Median7.468
Range6.917 – 7.532
CV0.0212
Skew / kurtosis-1.3 / 1
Normal?no

Metadata 1

species

metadata · categorical
species classesBeechBeech: 954954PoplarPoplar: 4444
n / missing1,013 / 15
Classes2
Balance (entropy)0.26
Imbalance ratio2e+01
Top classBeech (954)
Constant metadata 17
  • ecosis_resource_id7138fe3b-a9e2-4f45-90e2-bd4fe7340544
  • locationFair Hill Natural Resource Management Area, Elkton, MD
  • coordinate_precision_notessource-provided coordinates when available
  • year2,016
  • plant_partLeaf
  • instrumentSpectral Evolution PSP1100
  • acquisition_modeContact
  • signal_typereflectance
  • axis_unitnm
  • axis_min320
  • axis_max1,100
  • n_points_original781
  • citationKathryn I. Wheeler, Delphis F. Levia and Rodrigo Vargas. 2016. Spectra from in situ deciduous leaves and leaves collected for nitrogen analysis throughout autumn. Data set. Available on-line [http://ecosis.org] from the Ecological Spectral Information System (EcoSIS)
  • licensenot specified
  • rights_statusmanual_review_needed
  • usage_scopeprivate_use_only
  • notesEcoSIS package spectra-from-in-situ-deciduous-leaves-and-leaves-collected-for-nitrogen-analysis-throughout-autumn, no interpolation applied by project.

9 variable(s) omitted (no recorded values).

Alignment

Alignment levelobservation
Sample id availableyes
Samples1,013
Observations (total)1,013
Reps per samplemin 1 · mean 1 · max 1

Provenance & citation

ContributorSpectra from in situ deciduous leaves and leaves collected for nitrogen analysis throughout autumn
Origin · url [open]https://data.ecosis.org/dataset/spectra-from-in-situ-deciduous-leaves-and-leaves-collected-for-nitrogen-analysis-throughout-autumn
Origin · script [manual]source_to_standard.py — standardization script (maintainer-only)

Governance & integrity

Tierprivate
LicenseLicenseRef-not-cleared
Permitted useResearch and benchmarking; private use only.
Access policyManual download / private-use-only per source.
RedistributionEcoSIS license is missing or unclear; private/internal conversion only by v0.5 policy.
Content version1.0.0
Schema / protocol2.0
Content hashfd2a7700c0f6d594…
Processing hash768501ae7375e08d…
Metadata hash48bfb7b7214160be…

Load this dataset

# pip install nirs4all-datasets
from nirs4all_datasets import get

# private dataset — export requires a Dataverse token
ds = get("ecosis_spectra_from_in_situ_deciduous_leaves_and_leaves_collec_reflectance_nirs", token="…")
X, y = ds.x(), ds.y()
print(X.shape, y.shape)

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