Cartopy: Support for `plt.subplots`

[choldgraf]

I can't figure out how to get transform to work with plt.subplots. Since most people are using this function to create their axes these days, I think it'd be useful to patch this function in the same way that plt.subplot is patched...

[dopplershift]

Cartopy doesn't patch plt.subplot, for that one matplotlib allows the projection keyword argument, which is what Cartopy uses.

To use plt.subplots do:

import matplotlib.pyplot as plt
import cartopy.crs as ccrs
proj = ccrs.Geostationary()
fig, axes = plt.subplots(2, 2, subplot_kw=dict(projection=proj)))

I'm not saying it's pretty, but it's really a matplotlib problem, not really a CartoPy problem unless cartopy really wants to get in the business of overwriting matplotlib API.

[choldgraf]

oh hoh - that's nifty, good to know. I'm gonna close this issue and suggest to add an example that shows this off in my other issue ;-) #899