[R] How to extract all rows that contain the value of X in any column?

[David Winsemius]

No example. You are a regular now and examples ARE requested.

Would have thought something along the lines of:

pvh[ unlist( apply(pvh, 1, function(x) "dnv" %in%  
as.character(x) ) ) , ]

Not sure if the unlist or as.character are really needed because ...  
no example on which to test.


On Jun 16, 2009, at 1:41 PM, Mark Na wrote:

> Hi R-helpers,
>
> I'm trying to use this code
>
>> pvh_dnv<-pvh[sapply(pvh=="dnv"),]
>
> to make a new dataframe containing the rows from pvh that contain the
> value of "dnv" in ANY column.
>
> But, it's not working. I get this error
>
> Error in match.fun(FUN) : element 1 is empty;
>   the part of the args list of 'is.function' being evaluated was:
>   (FUN)
>
> which, to me, is cryptic.
>
> I'd appreciate any help you might provide, thanks!
>
> Mark Na
>
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David Winsemius, MD
Heritage Laboratories
West Hartford, CT