DOC: expanding comparison with R section
- [ ] closes #9815
- [ ] tests added / passed
- [ ] passes `git diff upstream/master | flake8 --diff`
- [ ] whatsnew entry

This is the beginning of a quick reference section.  It's incomplete,
just did a rough translation of
http://nbviewer.jupyter.org/urls/gist.githubusercontent.com/TomAugspurger/6e052140eaa5fdb6e8c0/raw/811585624e843f3f80b9b6fe89e18119d7d2d73c/dplyr_pandas.ipynb
into tables.  Should try to get some R experts to comment, and it would
be nice to have the pandas versions link to docs for the functions being
used, but I'm terrible at reStructuredText and gave up for the moment.

Thanks for this. There's a slightly updated version [here](https://gist.github.com/TomAugspurger/6e052140eaa5fdb6e8c0), but I can't really remember what changed.

reST can be a bit of a pain. For linking to methods, you can use e.g. 

```
:meth:`~pandas.DataFrame.sample`.
```
 Yeah, I tried :meth: once and didn't like it.

But seriously, I couldn't get it to format well, or deal with the example
arguments. I'll play with it some more eventually.
On Fri, Feb 26, 2016 at 16:40 Tom Augspurger notifications@github.com
wrote:

> Thanks for this. There's a slightly updated version here
> https://gist.github.com/TomAugspurger/6e052140eaa5fdb6e8c0, but I can't
> really remember what changed.
> 
> reST can be a bit of a pain. For linking to methods, you can use e.g.
> 
> :meth:`~pandas.DataFrame.sample`.
> 
> —
> Reply to this email directly or view it on GitHub
> https://github.com/pydata/pandas/pull/12472#issuecomment-189492001.
> 
> ## 
> 
> ## 
> 
> Cheers,
> Leif
 can you update
 @jreback thanks for the poke
 @leifwalsh thanks.

I merged this in. Pls have a look at the built docs (prob take a few hours). http://pandas-docs.github.io/pandas-docs-travis/comparison_with_r.html

not really sure if there is a way to make the 3 tables (sorting, transforming, grouping) be the same width .....
