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Alex Rivera
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I was studying some functions of the package rimage . If you want to see, for example, the code for the sobel.h function, you obtain: > library(rimage) > sobel.h function (img) { w <- dim(img)[2] h <- dim(img)[1] imagematrix(abs(matrix(.C("sobel_h", as.double(img), as.integer(w), as.integer(h), eimg = double(w * h), PACKAGE = "rimage")$eimg, nrow = h, ncol = w)), noclipping = TRUE) } So the sobel.h function uses the C routine called sobel_h , (which is (I think) stored in the file rimage.dll ). Is there any way to see the C code of the sobel_h function? (I speak about the package rimage for a practical example; but the answer would of course generalised to all packages that uses .C routines).
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