[R] function for rowMedian?
sundar.dorai-raj at pdf.com
Fri Jan 20 16:39:21 CET 2006
Max Kauer wrote:
> is anybody aware of a function to calculate a the median for specified
> columns in a dataframe or matrix - so analogous to rowMeans?
No equivalent in base R, but you could always use ?apply:
apply(x, 1, median)
assuming "x" is an array or is coercible to a array.
I have a C-function that does this as part of my personal R package (not
available from CRAN). It has the same time savings as "rowMeans" has
over apply(x, 1, mean). Contact me offline if you would like a copy.
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