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random sampling inside a dataset
2 messages · Gian Maria Niccolò Benucci, Berend Hasselman
On 13-09-2012, at 10:42, Gian Maria Niccol? Benucci wrote:
Hi all, I am wondering if do exist a function in R that allow me to sample or choose randomly the rows (i.e., samples) inside a given matrix.
Use sample. Like this for example A <- matrix(runif(8*4), nrow=8) A select.row <- sample(1:nrow(A), size= nrow(A)/3, replace=FALSE) select.row A[select.row,] Berend