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“R” has a package called “ChemometricsWithR”, where we can get data from different analytical instruments including Near Infrared (NIR).
Follow the steps to plot the spectra of a gasoline data set:
In this other case we plot the spectra of the NIR shootout 2002:
> wavelengths<-seq(600, 1898,by=2)
> data(gasoline, package=”pls”)
> wavelengths<-seq(900, 1700,by=2)