[R] ?grep

[John Fox]

Dear Oscar,

You don't need grep() to do what you want:

> Data[Data$Category == "G(50)", c("Time", "QC")]
   Time     QC
2  0.00 1.0000
6  0.01 1.0001
7  0.02 1.0003
8  0.03 1.0004
9  0.04 1.0005
10 0.05 1.0007
11 0.06 1.0008
12 0.07 1.0009
13 0.08 1.0011
14 0.09 1.0012
15 0.10 1.0013

I hope this helps,
 John

------------------------------
John Fox, Professor
Department of Sociology
McMaster University
Hamilton, Ontario, Canada
web: socserv.mcmaster.ca/jfox


> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On
> Behalf Of oscar linares
> Sent: January-18-09 4:18 PM
> To: r-help at r-project.org
> Subject: [R] ?grep
> 
> Dear Rxperts,
> 
> I have the following data:
> 
> Study Study.Name C Category TC Time   QC       QO SD FSD           Theta
>      1       NONE 0    P(22)  0 0.00   7.5596   0  0 8.0361e-03     0
>      1       NONE 6    G(50)  0 0.00   1.0000   0  0 0.0000e+00     0
>      1       NONE 2    F(02)  0 0.00 100.0000   0  0 0.0000e+00     0
>      1       NONE 3    F(03)  0 0.00  13.2280   0  0 1.6732e-02     0
>      1       NONE 2    F(02)  0 0.00 100.0000 100  1 0.0000e+00     0
>      1       NONE 6    G(50)  0 0.01   1.0001   0  0 5.6765e-07     0
>      1       NONE 6    G(50)  0 0.02   1.0003   0  0 7.5677e-07     0
>      1       NONE 6    G(50)  0 0.03   1.0004   0  0 1.5133e-06     0
>      1       NONE 6    G(50)  0 0.04   1.0005   0  0 1.8914e-06     0
>      1       NONE 6    G(50)  0 0.05   1.0007   0  0 2.2694e-06     0
>      1       NONE 6    G(50)  0 0.06   1.0008   0  0 2.6463e-06     0
>      1       NONE 6    G(50)  0 0.07   1.0009   0  0 3.2126e-06     0
>      1       NONE 6    G(50)  0 0.08   1.0011   0  0 3.5901e-06     0
>      1       NONE 6    G(50)  0 0.09   1.0012   0  0 4.1564e-06     0
>      1       NONE 6    G(50)  0 0.10   1.0013   0  0 4.5348e-06     0
>      1       NONE 2    F(02)  0 0.10  99.6310   0  0 1.2637e-05     0
>      1       NONE 3    F(03)  0 0.10  13.2090   0  0 1.6720e-02     0
> # END
> 
> I need to extract the elements labelled G(50) under Category heading with
> the corresponding col values in cols labeled Time and QC.
> 
> Please help:-)
> 
> Thank you in advance for excellent help!
> --
> Oscar
> Oscar A. Linares
> Molecular Medicine Unit
> Bolles Harbor
> Monroe, Michigan
> 
> 	[[alternative HTML version deleted]]
> 
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