[R] wrong with using subset

[Duncan Murdoch]

On 13/01/2010 10:45 AM, Don MacQueen wrote:
> I would suggest that first you look at the results of
>
>    (as.numeric(as.character(dfpr2_r$pr2))) > 0.2 && (dfpr2_r$landa > 10)
>
> by itself. Does it give all FALSE ?
>   

I'd guess the problem is using && instead of &. 

Duncan Murdoch
> Then look at each of the parts separately. What are the results of
>
>     (as.numeric(as.character(dfpr2_r$pr2))) > 0.2
> and
>     dfpr2_r$landa > 10
>
> Are there any TRUE among the results?
>
> Does
>     as.numeric(as.character(dfpr2_r$pr2))
> give what you expect?
>
> -Don
>
> At 5:20 PM +0200 1/13/10, Ahmet Temiz wrote:
> >hello
> >
> >is it wrong with this expression:
> >
> >subset(dfpr2_r,(as.numeric(as.character(dfpr2_r$pr2))) > 0.2 && (dfpr2_r$landa
> >>  10))
> >
> >it gives nothing
> >
> >regards
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