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In the case of the first derivative for the absortion band, the maximum becomes a cero crossing.Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.
Using SG filters, we can calculate it with R, and to see, like in the last posts, the Corrgram matrix.
Let´s see the three corrgram patterns together: (MSC, 1ª derivative, 2ª derivative)
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