hello,

yes I will try colmeans, I thought it will not get rid of th NA's....

But thank you for the advice!

Andre

2014-04-14 13:25 GMT+01:00 David McPearson [via R] <
ml-node+s789695n4688731h25@n4.nabble.com>:

> On Sun, 13 Apr 2014 05:01:40 -0700 (PDT) "[hidden email]<http://user/SendEmail.jtp?type=node&node=4688731&i=0>"
>
> <[hidden email] <http://user/SendEmail.jtp?type=node&node=4688731&i=1>>
> wrote
>
> > Thank you very much!!!!!!
> >
> ..
> ..
> >  *De :* arun kirshna [via R]
> > *Envoyé :* 13 avril 2014 11:23
> > *À :* [hidden email]<http://user/SendEmail.jtp?type=node&node=4688731&i=2>
> > *Objet :* Re: mean calculations from a dframe column
> >
> > Hi André,
> >
> > Your codes were missing in some information. If your code looks like
> this:
> ..
> ..
> > Mean <- apply(a, 2, mean, na.rm = TRUE)
> ..
> ..
> ..
>
> Andre,
>
> Just for future reference, have a look at
> ?colMeans
> "These functions are equivalent to use of apply with FUN = mean or FUN =
> sum
> with appropriate margins, but are a lot faster."
>
> Cheers,
> D.
>
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-----
André
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