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bug in DataArray.plot.pcolormesh #6775

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@hjalmarlucius

Description

@hjalmarlucius

What happened?

The below code fails - I believe its because _infer_interval_breaks is applied asymmetrically when one coord is string.

What did you expect to happen?

Success.

Minimal Complete Verifiable Example

from xarray import DataArray

x = DataArray(
    [[1, 2, 3], [4, 5, 6]],
    dims=("a", "b"),
    coords={"a": [1, 2], "b": ["a", "b", "c"]},
)
x.plot(infer_intervals=False)  # succeeds
x.plot()  # TypeError: Dimensions of C (2, 3) are incompatible with X (3) and/or Y (3); see help(pcolormesh)

MVCE confirmation

  • Minimal example — the example is as focused as reasonably possible to demonstrate the underlying issue in xarray.
  • Complete example — the example is self-contained, including all data and the text of any traceback.
  • Verifiable example — the example copy & pastes into an IPython prompt or Binder notebook, returning the result.
  • New issue — a search of GitHub Issues suggests this is not a duplicate.

Relevant log output

No response

Anything else we need to know?

No response

Environment

version 2022.3.0

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