DOC: mad description incorrectly includes 'numeric_only'

[stackedsax]

Problem description

I noticed a small mismatch between the function signature of mad and its description here:

• https://pandas-docs.github.io/pandas-docs-travis/reference/api/pandas.DataFrame.mad.html?highlight=mad#pandas.DataFrame.mad

The function signature is correct:

DataFrame.mad(self, axis=None, skipna=None, level=None)

The description, meanwhile, includes 'numeric_only':

numeric_only : bool, default None
Include only float, int, boolean columns. If None, will attempt to use everything, then use only numeric data. Not implemented for Series.

Passing the numeric_only parameter to mad will throw an error, as one would expect.

It looks like both mad and compound are using the @Appender(_num_doc) decorator, which points to a description that includes the numeric_only parameter even though neither of those methods use numeric_only.

The compound method is being deprecated, so that may be less of an issue.

There are a couple of different ways I could think to fix it, but I just wanted to confirm that I had this right before I did anything.

[r0cketr1kky]

Hi, I would like to work on this.
Does this mean I have to remove the numeric only parameter from the mad function in the docs?

[stackedsax]

Hi @r0cketr1kky. As I understand it, yes. I was just checking that I understood it correctly, though!

[r0cketr1kky]

Thanks a lot @stackedsax