Bug report

Bug summary

Not sure if this is really a bug or just a user issue. I expected that passing aclim tuple topcolormesh with novmin orvmax specified would update the color scale limits. I found that I had to usevmin andvmax instead. Maybe I am misunderstanding andvmin andvmax should always be used. However, it looks like the kwargs are passed into theQuadMesh constructor and thenclim is overwritten withvmin andvmax, even in they are None andclim is given. (https://github.com/heath730/matplotlib/blob/master/lib/matplotlib/axes/_axes.py#L5629).

Code for reproduction

importmatplotlib.pyplotaspltimportnumpyasnpplot_me=np.random.rand(5,5)plt.subplot(211)plt.title("Expected")plt.pcolormesh(plot_me,vmin=0,vmax=0.5)plt.colorbar()plt.subplot(212)plt.title("Result")plt.pcolormesh(plot_me,clim=(0,0.5))plt.colorbar()plt.show()

Matplotlib version

• Operating system: win7
• Matplotlib version: 2.1.2
• Matplotlib backend (print(matplotlib.get_backend())): TkAgg
• Python version: 3.5.1
• Jupyter version (if applicable):
• Other libraries:

Would something like:

  (vmin,vmax)=kwargs.pop('clim', (None,None))

Before the vmin and vmax pops on thisline be a reasonable update?