On 29/04/2008 9:53 AM, Julien Roux wrote:
Hi list,
I created a function to plot my data:
plot_function(vector)
I want to write the name of the argument vector in the legend/title of
the plot.
For example if I call:
> plot_function(my_vector)
I want "my_vector" to be written in the legend or title and so retrieve
the name of this object as a string.
Is it possible to achieve this?
Yes. If the argument name is arg in the function definition, then
substitute(arg) gives the expression that was passed, and
deparse(substitute(arg)) converts it into a string to use in a title.
e.g.
> plot_function <- function(arg) {
+ deparse(substitute(arg))
+ }
> plot_function(my_vector)
[1] "my_vector"
Duncan Murdoch
Thanks a lot for your help
Julien
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