[R] request if a variable is defined

[Gabor Csardi]

Bingo!

See ?exists

G.

On Tue, Mar 04, 2008 at 04:38:31PM +0100, Paul Hammer wrote:
> hi members,
> 
> give it a function for requesting if a object, matrix, vector, variable 
> or whatever already exists?
> 
> e.g. if (*exists*(a) {print("yes") } else { print("no") }
> 
> thanks
> paul
> 
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> 
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-- 
Csardi Gabor <csardi at rmki.kfki.hu>    UNIL DGM