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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