[R] remove columns having a partial match name

[jim holtman]

DATA_OK <- DATA[-grep("^Start", names(DATA)),]

On 7/18/07, João Fadista <Joao.Fadista at agrsci.dk> wrote:
> Dear all,
>
> I would like to know how can I retrieve a data.frame without the columns that have a partial match name. Let´s say that I have a data.frame with 200 columns and 100 of them have the name "StartX", with X being the unique part for each column name. I want to delete all columns that have the name starting with "Start". I´ve tried to do this but it doesn´t work:
>
> > DATA_OK <- DATA[,-match(("Start*"),names(DATA))]
> > dim(DATA_OK)
> NULL
>
>
> Thanks in advance.
> Best regards
>
> João Fadista
> Ph.d. student
>
>
>
>         UNIVERSITY OF AARHUS
> Faculty of Agricultural Sciences
> Dept. of Genetics and Biotechnology
> Blichers Allé 20, P.O. BOX 50
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>
> Phone:   +45 8999 1900
> Direct:  +45 8999 1900
> E-mail:  Joao.Fadista at agrsci.dk <mailto:Joao.Fadista at agrsci.dk>
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-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

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