Bryan,
Try this.
char <- paste("X", 1:2, sep="", collapse="+")
eval(parse(text=char))
Jean
Bryan Keller <bsbkel...@gmail.com> wrote on 09/16/2012 11:04:19 PM:
>
> Is it possible to use "paste" to write out an expression and evaluate
it?
> Suppose I want to add two vectors X1 and X2, defined as follows:
>
> X1 <- 1:6
> X2 <- 6:1
>
> If I write the following it looks like what I want but is a character:
> noquote(paste(paste("X", 1, sep = ""), paste("X", 2, sep = ""), sep =
"+"))
>
> Is there a way to tell R that I want to evaluate the text, not just
print
> it out as a character?
>
> Bryan
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