StatsOnSpectra: StatsOnSpectra

In tommasojulitta/FieldSpectroscopyCC: R package for Characterization and Calibration of spectrometers

Description

Compute statistic across several spectra subset to a specified spectral range

Usage

StatsOnSpectra(wl, wlStart = wl[1], wlEnd = wl[length(wl)], spectra = spectra, 


    fun = "mean", margin = 1)

Arguments

wl	numeric vector: wavelength for each row in spectra
wlStart	numeric value or vector: first wavelength of the spectral range selection. Default value: first wavelength of wl vector
wlEnd	numeric value or vector: last wavelength of the spectral range selection. Default value: last wavelength of wl vector
spectra	numeric matrix or data.frame: collection of several spectra acquired by several columns (Digital numbers, Radiance, Reflectance).
fun	character or function: function to be applied on each row of the data.frame. Default function: mean
margin	numeric value: a vector giving the subscripts which the function will be applied over. 1 indicates rows, 2 indicates columns

Value

numeric data.frame containing the computed statistic across the selected spectral range.

Author(s)

Tommaso Julitta, Mirco Migliavacca, Thomas Wutzler

Examples

  


data("snr_data")


#perform statistics on spectra


#calculate mean of the  signal between 700 and 800 nm


mean<-StatsOnSpectra(wl=snr_data$wl,spectra=snr_data$data_lamp,fun='mean',wlStart=700,wlEnd = 800)


#calculate stadard deviation of the signal between 700 and 800 nm


sd<-StatsOnSpectra(wl=snr_data$wl,spectra=snr_data$data_lamp,fun='sd',wlStart=700,wlEnd = 800)

tommasojulitta/FieldSpectroscopyCC documentation built on May 31, 2019, 6:19 p.m.