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

From: Henrique Dallazuanna <wwwhsd_at_gmail.com>
Date: Tue, 04 Mar 2008 09:29:41 -0300

I think that this shoul works:

do.call(rbind, apply(as.table(x), 1, function(.x).x[any(.x < cutoff)]))

Change as.table(x) by your table

On 04/03/2008, rich @ thevillas. eclipse. co. uk <rich_at_thevillas.eclipse.co.uk> wrote:
>
>
>
>
> 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, rich_at_thevillas.eclipse.co.uk
> <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
> > ______________________________________________
> > R-help_at_r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide
> 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
>
>
>
>

-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O

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Received on Tue 04 Mar 2008 - 12:36:54 GMT

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