| rowOrderStats {matrixStats} | R Documentation |
Gets an order statistic for each row (column) in a matrix.
rowOrderStats(x, which, ...) colOrderStats(x, which, ...)
x |
A numeric NxK matrix. |
which |
An integer index in [1,K] ([1,N]) indicating which
order statistic to be returned. |
... |
Not used. |
The implementation of rowOrderStats() is optimized for both
speed and memory.
To avoid coercing to doubles (and hence memory allocation), there
is a unique implementation for integer matrices.
Currently, colOrderStats(x) is calling rowOrderStats(t(x)).
Returns a numeric vector of length N (K).
This method does not handle missing values, that is, the result
corresponds to having na.rm=FALSE (if such an argument would
be available).
Henrik Bengtsson (http://www.braju.com/R/)
The native implementation of rowOrderStats() was adopted from
Robert Gentleman's rowQ in the Biobase package.
See rowMeans() in colSums().