A matrix with numbers.
This function simply does this function x[, -1] - x[, -k], where k is the last column of the matrix x. But it does it a lot faster. That is, 2nd column - 1st column, 3rd column - 2nd column, and so on.
A matrix with one column less containing the differences between the successive columns.
R implementation and documentation: Manos Papadakis <firstname.lastname@example.org>.
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Loading required package: Rcpp Loading required package: RcppZiggurat
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