[R] Get inside a function the name of a variable called as argument?

Hans Ekbrand hans.ekbrand at sociology.gu.se
Tue Apr 29 16:30:51 CEST 2008

On Tue, Apr 29, 2008 at 03:53:02PM +0200, 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?

While it might be possible, I think it would be better to use an extra
argument for this:

plot_function(my_vector, title = my_title)

Functions should be general, and relying on the name of the variable
makes your function less general. What if you in the future want to
use plot_function with an anynmous vector created dynamically? e.g by
combining two other vectors:

plot_function(c(foo, bar))

Hans Ekbrand (http://sociologi.cjb.net) <hans at sociologi.cjb.net>
GPG Fingerprint: 1408 C8D5 1E7D 4C9C C27E 014F 7C2C 872A 7050 614E
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 191 bytes
Desc: Digital signature
URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20080429/fa00352f/attachment.bin>

More information about the R-help mailing list