[R] if(grep())

[Thomas Lumley]

On Tue, 12 Oct 1999, Michael Lapsley wrote:

> Would anyone care to comment if this is the best solution to this problem?
> 
> > trygrep <-function(x,y)
> + if(grep(x,y))
> + print("yes") else
> + print("NO")
> >  
> >trygrep("foo","bafoobar")
> [1] "yes"
> >
> > trygrep("foo","bar")
> Error in if (grep(x, y)) print("yes") else print("NO") : missing value where
> logical needed


You could try 
	if(length(grep(x,y))==0)



Thomas Lumley
Assistant Professor, Biostatistics
University of Washington, Seattle

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