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What does this program do?

This program plots the Terrestrial Organic Matter Input Index curve using data from d13C and TOC:TN. These data are interpolated on a grid formed by inferred standard values of d13C, TOC:TN, and TOMI Index. Kriging is the interpolation method used, but the interpolation model can be changed.

It's possible to export the plotted data, but be cautious because the data are exported with the decimal defined by . and many Brazilian software programs (Excel, Sheets) use , as the delimiter.