
I am porting a program in matlab to R,
The problem is that Matlab has a feature where symbols that aren't arguments are evaluated immediately.
That is:
Y=3
F=@(x) x*Y

Will yield a function such that F(2)=6.
If later say. Y=4 then F(2) will still equal 6.

R on the other hand has lazy evaluation.
F<-function(x){x*Y}
Will do the following
Y=3
F(2)=6
Y=4
F(2)=8.
Does anyone know of away to defeat lazy evaluation in R so that I can easily simulate the Matlab behavior.  I know that I can live without this in ordinary programming but it would make my port much easier.

Thanks.




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