[R] typecasting a function from character to double

[LucasM]

Hello,
I try to plot a number of functions that are given by a textfile. This file
looks like this:
----
(1+s) / (1+k) ;
(1+(2*s)^2) / (1+k)^2 ;
etc etc.
----

I import these functions into R with the 'readLines' command. This creates a
table whose elements contain the conditions as character strings. I want to
generically plot the functions (there are many) while varying k, but the
type of the imported functions is 'character'. I cannot coerce it to double;
this creates NaN's. 

Any suggestions for a way out?

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