[R] How to select a whole column? Thanks!

[Paul Lemmens]

Hoi Jinsong,

--On dinsdag 3 augustus 2004 1:42 -0700 Jinsong Zhao <jinsong_zh at yahoo.com> 
wrote:
> For instance, I hope to remove the V3~6 column, for all the value in
> those colume is zero.
>
>   V3 V4 V5 V6     V7     V8     V9    V10
> 1  0  0  0  0  0.000  0.000  0.000  0.000
> 2  0  0  0  0  0.000  0.000  0.000  0.000
> 3  0  0  0  0  0.000  0.000  0.000  0.000
> 4  0  0  0  0  0.000  0.000  0.000  0.000
> 5  0  0  0  0  0.000  0.000  0.000  0.000
> 6  0  0  0  0 -0.001 -0.001 -0.001 -0.001
> 7  0  0  0  0  0.000  0.000  0.000 -0.001
> 8  0  0  0  0  0.000  0.000  0.000 -0.001
> 9  0  0  0  0 -0.009 -0.012 -0.015 -0.018
>
> I mean how to select the first four columns.
>
subset(df, select=-c(V3,V4,V5,V6))



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Paul Lemmens
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