[R] help with as.function

[Gabor Grothendieck]

 <solares <at> unsl.edu.ar> writes:

> 
> HI, sorry but i don't understand how to make a function with as.function()
> 
> formula<-"2+3*x"
>  formu<-as.symbol(formula)
> > formu
> 2+3*x
>  formul<-as.function(alist(x=,formu))
> curve(formul,1,5,col="blue")
> Error in xy.coords(x, y, xlabel, ylabel, log) :
>         x and y lengths differ
> > typeof(formul)
> [1] "closure"
> 
> and not plot the curve function, Why? Thanks Ruben

Here are two ways to create a function out of strings although
neither uses as.function:

f <- function(x){}
body(f) <- parse(text="2+3*x")

f <- eval(parse(text=paste("function(x)","2+3*x")))