Re: [R] creating a matrix subset based on a threshold cutoff

From: <rich_at_thevillas.eclipse.co.uk>
Date: Tue, 04 Mar 2008 12:00:49 +0000

   sorry, it would probably better be described as a table

   thanks

   On Tue Mar 4 11:28 , "Henrique Dallazuanna" sent:    

     You have a table or matrix?
     if is matrix:
     set.seed(123)
     x <- matrix(rnorm(100), 10, 10)
     cutoff <- -1.5
     do.call(rbind, apply(x, 1, function(.x).x[any(.x < cutoff)]))
     On 04/03/2008, [1]rich_at_thevillas.eclipse.co.uk
     <[2]rich_at_thevillas.eclipse.co.uk> wrote:

>
> Hi,
>
> I have a table of x rows and y columns. The table is huge and so i'd
like
> to create a subset of the data containing rows where any of the y values
are
> below a threshold, say 1e-4. Is there a simple way of doing this in R?
>
>
> thanks
>
> Rich
> ______________________________________________
> [3]R-help_at_r-project.org mailing list
> [4]https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
[5]http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
-- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O

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Received on Tue 04 Mar 2008 - 12:04:28 GMT

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