On 2/24/11 1:21 PM, David Winsemius wrote:
On Feb 24, 2011, at 1:03 PM, Duke wrote:
Hi folks,
I am wondering if the following is possible: I want to control the
arguments sent to a function by string variables. For example,
instead of
> heatmap.2( A, col=greenred(75) )
I would want to have something like:
> heatmap.2 ( paste(A, "col=greenred(75)", sep=",") )
Is this possible to do that?
It is possible (to do various things), but that would fail. You would
need to pass a character argument to parse() and then eval() but
probably not in the argument list. And there are possibly much cleaner
ways of doing what you want to achieve. Can you describe "what you
want to achieve" in more detail? An example that presents R objects is
the accepted manner for posing such questions.
What I want to do is to control the options sent to heatmap function
based on the argument input, and I dont want to have a lot of heatmap.2
commands such as
if () heatmap.2(...)
else if () heatmap.2(...)
else if () heatmap.2(...)
...
If I can control the *string* argument, then I can simply reducing the
above commands to a much shorter and nicer code. Solution given by Peter
and you using parse() and eval() was exactly what I asked for.
Thanks so much to both of you :).
D.
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