[R] function for rowMedian?

[Philippe Grosjean]

Note that there is a confusion here: 1st dimension is row, 2nd dimension 
is column for matrix & data.frame.
So, if the question is about "rowMedian", you have:

 > rowMedian <- function(x, na.rm = FALSE)
 >     apply(x, 2, median, na.rm = na.rm)

Now, you ask for the "median for specified columns", which should be as 
Andy proposes you, or, if you really want a colMedian function:

 > colMedian <- function(x, na.rm = FALSE)
 >     apply(x, 1, median, na.rm = na.rm)

Best,

Philippe Grosjean

Liaw, Andy wrote:
> apply(x, 1, median) should do it.  If not, you need to explain why.
> 
> Andy
> 
> -----Original Message-----
> From: Max Kauer
> Sent: Friday, January 20, 2006 10:24 AM
> To: r-help at stat.math.ethz.ch
> Subject: [R] function for rowMedian?
> 
> 
> Hi
> is anybody aware of a function to calculate a the median for specified
> columns in a dataframe or matrix - so analogous to rowMeans?
> Thanks
> Max
> 
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