swectral.vegeind.sr#

swectral.vegeind.sr(spec_array, wavelength, axis=0)[source]#

Compute SR (simple ratio, simple ratio of R800 / R675) of 2D array-like of 1D spectra data series. The calculation is based on:

Jordan, C. F. (1969).
Derivation of Leaf-Area Index from Quality of Light on the Forest Floor.
Ecology, 50(4), 663–666.
https://doi.org/10.2307/1936256

Parameters:

spec_array2D array_like, shape (n_samples, n_features): 2D array-like of 1D spectral data series.
wavelength1D array_like: Wavelengths for the spectra data.
axisint, optional: Axis of spectral data series index, must be 0 or 1. If 0, each row represents a sample spectrum.

Returns:

pandas.DataFrame: Dataframe containing spectral indices of the samples.

Return type:

DataFrame