[R] Conditional rows
Gabor Csardi
csardi at rmki.kfki.hu
Mon Feb 11 14:29:25 CET 2008
Because you need
test <= 0.2 | test >0.3
See ?"|"
Gabor
On Mon, Feb 11, 2008 at 09:12:57PM +0800, Stanley Ng wrote:
> That works beautfully. Why using test<=0.2 || test >0.3 gives error ?
>
> -----Original Message-----
> From: Gabor Csardi [mailto:csardi at rmki.kfki.hu]
> Sent: Monday, February 11, 2008 18:27
> To: Ng Stanley
> Cc: r-help
> Subject: Re: [R] Conditional rows
>
> which(apply(test<=0.2, 1, all))
>
> See ?which, ?all, and in particular ?apply.
>
> Gabor
>
> On Mon, Feb 11, 2008 at 06:22:09PM +0800, Ng Stanley wrote:
> > Hi,
> >
> > Given a simple example, test <- matrix(c(0.1, 0.2, 0.1, 0.2, 0.1,
> > 0.1, 0.3, 0.1, 0.1), 3, 3)
> >
> > How to generate row indexes for which their corresponding row values
> > are less than or equal to 0.2 ? For this example, row 2 and 3 are the
> > correct ones.
> >
> > Thanks
[...]
--
Csardi Gabor <csardi at rmki.kfki.hu> UNIL DGM
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