ENH: Don't infer pcolormesh interval breaks for unevenly spaced coordiantes

[jhamman]

Based on discussion in #781 and #782, it seems like a bad idea to infer (guess) the spacing of coordinates when they are unevenly spaced. As @ocefpaf points out:

guessing should be an active user choice, not the automatic behavior.

So the options moving forward are to

1. never infer the interval breaks and be okay with pcolormesh and imshow producing dissimilar plots, or
2. only infer the interval breaks when the coordinates are evenly spaced.

cc @clarkfitzg

[clarkfitzg]

Thanks for keeping me in the loop- hopefully next month I can participate. New baby and Phd quals => no time now

1 appears to be the simpler option off the top of my head.

[jhamman]

I agree, 1 seems to be the easiest.

@clarkfitzg P.S. I think we're in the same boat, new baby and I'm just a few months from my defense.

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[dcherian]

still relevant

[fmaussion]

yes, also the current solution isn't too bad as well.

[fmaussion]

especially because there is not robust logic as to how to check for coordinates being evenly spaced. I remember this topic has been discussed somewhere already, but I don't remember where.

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