Dear R users,
I wonder if it is possible to form a function from a character string. Here is
an example:
> x=3
> `-`(`+`(`^`(x,3),`^`(x,2)),1) # Here is my function evaluated.
[1] 35
> V=list("`-`","(","`+`","(","`^`","(","x",",",3,")",",","`^`","(","x",",",2,")",")",",",1,")")
> # Here I construct the string, it could be vector as well?
>
> S=noquote(paste(V,collapse=""))
>
> S
[1] `-`(`+`(`^`(x,3),`^`(x,2)),1) # Here is the same as a character string.
Now I'd like to create a function using this string, something like this, but
of course, this doesn't work:
S=as.expression(S)
F1<-function(x){S}
Is there some way to do this?
Cheers,
Atte Tenkanen
University of Turku, Finland
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