[R] Get median of each column

Rolf Turner r.turner at auckland.ac.nz
Wed Jan 28 20:53:44 CET 2009


On 29/01/2009, at 8:39 AM, Stephan Kolassa wrote:

> Assuming your data are in a data.frame called dataset,
>
> apply(dataset,2,median)
>
> should work. Look at
>
> ?apply

Note that apply() works with ***matrices***.  The foregoing code will
work, given that all columns of ``dataset'' are numeric, due to the
fact that apply will *coerce* a data frame to a matrix.

However it should always be remembered that

	DATA FRAMES ARE NOT MATRICES!!!

cheers,

	Rolf Turner

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