matmax {geometry} | R Documentation |
Row-wise matrix functions
Description
Compute maximum or minimum of each row, or sort each row of a matrix, or a set of (equal length) vectors.
Usage
matmax(...)
Arguments
... |
A numeric matrix or a set of numeric vectors (that are
column-wise bind together into a matrix with |
Value
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.
Author(s)
Raoul Grasman
Examples
example(Unique)
[Package geometry version 0.4.7 Index]