html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/issues/1197#issuecomment-271904169,https://api.github.com/repos/pydata/xarray/issues/1197,271904169,MDEyOklzc3VlQ29tbWVudDI3MTkwNDE2OQ==,10050469,2017-01-11T15:47:50Z,2017-01-11T15:47:50Z,MEMBER,@shoyer maybe changing the warning into an error would be the way to go now? ,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,199816142
https://github.com/pydata/xarray/issues/1197#issuecomment-271903682,https://api.github.com/repos/pydata/xarray/issues/1197,271903682,MDEyOklzc3VlQ29tbWVudDI3MTkwMzY4Mg==,10050469,2017-01-11T15:46:19Z,2017-01-11T15:46:37Z,MEMBER,"Note that the recommended to build data arrays is to specify the dimensions names explicitly:

```
In [11]: xr.DataArray(np.zeros([1, 2, 3]), {'x': [1], 'y': [1, 2], 'z': [1, 2, 3]}, 
                                 dims=['x', 'y', 'z'])
Out[11]: 
<xarray.DataArray (x: 1, y: 2, z: 3)>
array([[[ 0.,  0.,  0.],
        [ 0.,  0.,  0.]]])
Coordinates:
  * y        (y) int64 1 2
  * z        (z) int64 1 2 3
  * x        (x) int64 1
```

on master, failing to do so results in a ``FutureWarning`` (which is the important message, but gets lost in the traceback) and then in a ``ValueError`` (which might be confusing):

```
In [12]: xr.DataArray(np.zeros([1, 2, 3]), {'x': [1], 'y': [1, 2], 'z': [1, 2, 3]})
/home/mowglie/.pyvirtualenvs/py3/bin/ipython:1: FutureWarning: inferring DataArray dimensions from dictionary like ``coords`` has been deprecated. Use an explicit list of ``dims`` instead.
  #!/home/mowglie/.pyvirtualenvs/py3/bin/python3
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-12-501c20b8b785> in <module>()
----> 1 xr.DataArray(np.zeros([1, 2, 3]), {'x': [1], 'y': [1, 2], 'z': [1, 2, 3]})

/home/mowglie/Documents/git/xarray/xarray/core/dataarray.py in __init__(self, data, coords, dims, name, attrs, encoding, fastpath)
    219 
    220             data = as_compatible_data(data)
--> 221             coords, dims = _infer_coords_and_dims(data.shape, coords, dims)
    222             variable = Variable(dims, data, attrs, encoding, fastpath=True)
    223 

/home/mowglie/Documents/git/xarray/xarray/core/dataarray.py in _infer_coords_and_dims(shape, coords, dims)
     83                 raise ValueError('conflicting sizes for dimension %r: '
     84                                  'length %s on the data but length %s on '
---> 85                                  'coordinate %r' % (d, sizes[d], s, k))
     86 
     87     assert_unique_multiindex_level_names(new_coords)

ValueError: conflicting sizes for dimension 'y': length 1 on the data but length 2 on coordinate 'y'
```


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