| matmax, matmin, matsort {geometry} | R Documentation |
Compute maximum or minimum of each row, or sort each row of a matrix, or a set of (equal length) vectors.
matmax(...) matmin(...) matsort(...) matorder(...)
... |
A numeric matrix or a set of numeric vectors (that are column-wise bind together
into a matrix with cbind). |
matmin and matmax return a vector of length nrow(cbind(...)).
matsort returns a matrix of dimension dim(cbind(...)) with in each row of cbind(...) sorted.
matsort(x) is a lot faster than, e.g., `t(apply(x,1,sort))', if x is tall (i.e.,
nrow(x)>>ncol(x) and ncol(x)<30. If ncol(x)>30 then matsort simply
calls `t(apply(x,1,sort))'.
matorder returns a permutation which rearranges its first argument
into ascending order, breaking ties by further arguments.
Raoul Grasman
example(Unique)