getNRI: Return nri-values

In hsdar: Manage, Analyse and Simulate Hyperspectral Data

Return nri-values

Description

Return normalized ratio index values at a given wavelength combination.

Usage

getNRI(nri, wavelength)

Arguments

nri	Object of class 'Nri'
wavelength	Wavelength values where nri is returned. See details section.

Details

Wavelength can be passed in three ways. As the result of nri_best_performance, as a data frame with two columns or as a vector of length 2. In the first two cases, the result will be a data frame (if data frames contain more than one row) with the nri-values of each pair of wavelengths. In the latter case it will be a vector.

Author(s)

Lukas Lehnert

See Also

nri, Nri

Examples

data(spectral_data)

## Calculate all possible combinations for WorldView-2-8
spec_WV <- spectralResampling(spectral_data, "WorldView2-8",
                              response_function = FALSE)
nri_WV <- nri(spec_WV, recursive = TRUE)

## Build glm-models
glmnri <- glm.nri(nri_WV ~ chlorophyll, preddata = spec_WV)

## Return best 5 models
BM <- nri_best_performance(glmnri, n = 5, coefficient = "p.value")

## Get nri values for the 5 models
nri_BM <- getNRI(nri_WV, BM)

hsdar documentation built on March 18, 2022, 6:35 p.m.