Column and row-wise sums of a matrix
Column and row-wise sums of a matrix.
colsums(x,indices = NULL, parallel = FALSE) rowsums(x,indices = NULL, parallel = FALSE)
x |
A numerical matrix with data. |
indices |
An integer vector with the indices to sum the columns/rows. |
parallel |
Do you want to do it in parallel in C++? TRUE or FALSE. Doens't work with argument "indices". |
A vector with sums.
Manos Papadakis
R implementation and documentation: Manos Papadakis <papadakm95@gmail.com>.
x <- matrix(rpois(500 * 100, 10),ncol = 100) x1 <- colsums(x) x2 <- colSums(x) all.equal(x1,x2) x1 <- rowsums(x) x2 <- rowSums(x) all.equal(x1,x2) x<-x1<-x2<-NULL
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