On Wed, 10 Mar 2010, baptiste auguie wrote:
Hi,
it's generally considered a bad practice but try this,
eval(parse(text=AA))
library(fortunes)
fortune(106)
HTH,
baptiste
On 10 March 2010 07:46, jq81 <jingqia...@gmail.com> wrote:
My question is represented by the following example.
For example, I have a character string a, which is defined as
AA="list(x=1, y=2)"
I want to take out the content of AA by using some function, so that I can
obtain the following expression automatically.
list(x=1, y=2)
This is the situation where it isn't considered bad practice. If someone hands
you a string with code in it, the only way to parse it is with parse().
The problem with eval(parse()) is when people use it to do macro processing or
other things that are much better done with expressions.
-thomas
Thomas Lumley Assoc. Professor, Biostatistics
tlum...@u.washington.edu University of Washington, Seattle
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