[R] list of frames without first element

Liaw, Andy andy_liaw at merck.com
Fri Aug 6 16:09:17 CEST 2004


> From: Luis Rideau Cruz
> 
> R-help,
> 
> I have a list of several data frames.
> 
> I want to compute the "rowSums" of the columns of these data 
> frames but  first one.
> 
> Something like this 
> 
>                     lapply(my.list,rowSums)

You're almost there:

 lapply(my.list, function(x) rowSums(x[-1]))

Andy

 
> Thank you
> 
> 
> Luis Ridao Cruz
> Fiskirannsóknarstovan
> Nóatún 1
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> 
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