R help - Oct 2012 - which() with multiple conditions

I hope someone can point me in the right direction please.

I have a data frame with a column containing names.  I want to identify the
columns that contain names in a list.

namestofind <- c('fred','bill',....a long list)

If I only wanted to identify a single name I would use

which(z$name == 'bill')

What syntax would I use to identify all the rows that contain any of the
names in namestofind?

Thanks in advance for the pointer





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On Monday, October 1, 2012, pdb wrote:
> I hope someone can point me in the right direction please.
>
> I have a data frame with a column containing names.  I want to identify the
> columns that contain names in a list.
>
> namestofind <- c('fred','bill',....a long list)
>
> If I only wanted to identify a single name I would use
>
> which(z$name == 'bill')
>
> What syntax would I use to identify all the rows that contain any of the
> names in namestofind?

%in%

Michael

>
> Thanks in advance for the pointer
>
>
>
>
>
> --
> View this message in context:
> http://r.789695.n4.nabble.com/which-with-multiple-conditions-tp4644677.html
> Sent from the R help mailing list archive at Nabble.com.
>
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