issues: 404383025

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id node_id number title user state locked assignee milestone comments created_at updated_at closed_at author_association active_lock_reason draft pull_request body reactions performed_via_github_app state_reason repo type
404383025 MDU6SXNzdWU0MDQzODMwMjU= 2725 Line plot with x=coord putting wrong variables on axes 35968931 closed 0     3 2019-01-29T16:43:18Z 2019-01-30T02:02:22Z 2019-01-30T02:02:22Z MEMBER      

When I try to plot the values in a 1D DataArray against the values in one of its coordinates, it does not behave at all as expected:

```python import numpy as np import matplotlib.pyplot as plt from xarray import DataArray

current = DataArray(name='current', data=np.array([5, 8, 14, 22, 30]), dims=['time'], coords={'time': (['time'], np.array([0.1, 0.2, 0.3, 0.4, 0.5])), 'voltage': (['time'], np.array([100, 200, 300, 400, 500]))})

print(current)

Try to plot current against voltage

current.plot.line(x='voltage') plt.show() ``` Output:

<xarray.DataArray 'current' (time: 5)> array([ 5, 8, 14, 22, 30]) Coordinates: * time (time) float64 0.1 0.2 0.3 0.4 0.5 voltage (time) int64 100 200 300 400 500

Problem description

Not only is 'voltage' not on the x axis, but 'current' isn't on the y axis either!

Expected Output

Based on the documentation (and common sense) I would have expected it to plot voltage on the x axis and current on the y axis.

(using a branch of xarray which is up-to-date with master)

 
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   completed 13221727 issue

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