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Read ENVI spectral libraries

Source: R/readSLI.R
readSLI.Rd

read/write support for ENVI spectral libraries

Usage

readSLI(path)

Arguments

path

Path to spectral library file with ending .sli.

Value

The spectral libraries are read into a data.frame. The first column contains the wavelengths and the remaining columns contain the spectra.

Details

ENVI spectral libraries consist of a binary data file (.sli) and a corresponding header (.hdr, or .sli.hdr) file.

See also

writeSLI

Examples


## Example data
sliFile <- system.file("external/vegSpec.sli", package="RStoolbox")
sliTmpFile <- paste0(tempdir(),"/vegetationSpectra.sli") 

## Read spectral library
sli <- readSLI(sliFile)
head(sli)
#>   wavelength veg_stressed   veg_vital
#> 1        350  0.008958003 0.008836994
#> 2        351  0.008910760 0.008909440
#> 3        352  0.008874181 0.008972186
#> 4        353  0.008847097 0.009025744
#> 5        354  0.008829174 0.009071405
#> 6        355  0.008819440 0.009109739
plot(sli[,1:2], col = "orange", type = "l")
lines(sli[,c(1,3)], col = "green")

 
## Write to binary spectral library
writeSLI(sli, path = sliTmpFile)