generate simple function with pre-defined constants
On Thu, Jun 6, 2013 at 4:48 PM, Liviu Andronic <landronimirc at gmail.com> wrote:
Dear all, Given: a <- 2 b <- 3 I'd like to obtain the following function: f <- function(x) 2 + 3*x but when I do this: f <- function(x) a + b*x ##f ##function(x) a + b*x the 'a' and 'b' objects do not get evaluated to their constants. How could I do that?
I found one solution:
a <- 2
b <- 3
f <- eval(parse(text=paste("function(z)", a, "+ z * ", b)))
f
##function(z) 2 + z * 3
but I still have nightmares from:
fortune("parse")
If the answer is parse() you should usually rethink the question.
-- Thomas Lumley
R-help (February 2005)
Is there a nicer way to approach this? Thanks,
Liviu
Thanks, Liviu -- Do you know how to read? http://www.alienetworks.com/srtest.cfm http://goodies.xfce.org/projects/applications/xfce4-dict#speed-reader Do you know how to write? http://garbl.home.comcast.net/~garbl/stylemanual/e.htm#e-mail
Do you know how to read? http://www.alienetworks.com/srtest.cfm http://goodies.xfce.org/projects/applications/xfce4-dict#speed-reader Do you know how to write? http://garbl.home.comcast.net/~garbl/stylemanual/e.htm#e-mail