issues: 479914290

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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
479914290 MDExOlB1bGxSZXF1ZXN0MzA2NzExNDYx 3210 sparse=True option for from_dataframe and from_series 1217238 closed 0     5 2019-08-13T01:09:19Z 2019-08-27T16:04:13Z 2019-08-27T08:54:26Z MEMBER   0 pydata/xarray/pulls/3210

Fixes https://github.com/pydata/xarray/issues/3206

Example usage:

In [3]: import pandas as pd
   ...: import numpy as np
   ...: import xarray
   ...: df = pd.DataFrame({
   ...:     'w': range(10),
   ...:     'x': list('abcdefghij'),
   ...:     'y': np.arange(0, 100, 10),
   ...:     'z': np.ones(10),
   ...: }).set_index(['w', 'x', 'y'])
   ...:

In [4]: ds = xarray.Dataset.from_dataframe(df, sparse=True)

In [5]: ds.z.data
Out[5]: <COO: shape=(10, 10, 10), dtype=float64, nnz=10, fill_value=nan>
  • [x] Closes #3206, Closes #2139
  • [x] Tests added
  • [x] Passes black . && mypy . && flake8
  • [x] Fully documented, including whats-new.rst for all changes and api.rst for new API
 
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