“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:

**> data(shootout)**

**> wavelengths<-seq(600, 1898,by=2)**

**> mattplot(wavelengths,shootout$calibrate.1[1,],xlab=”wavelength(nm)”,ylab=”log1/R)”)**

**> library(ChemometricsWithR)**

**> data(gasoline, package=”pls”)**

**> wavelengths<-seq(900, 1700,by=2)**

**> matplot(wavelengths,t(gasoline$NIR),lty=1,xlab=”wavelengths(nm)”,ylab=”log(1/R)”)**

*Related*

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