[R] wrong with using subset

[Don MacQueen]

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 ?

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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-- 
--------------------------------------
Don MacQueen
Environmental Protection Department
Lawrence Livermore National Laboratory
Livermore, CA, USA
925-423-1062