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Diffstat (limited to 'doc/release/2.0.0-notes.rst')
| -rw-r--r-- | doc/release/2.0.0-notes.rst | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/doc/release/2.0.0-notes.rst b/doc/release/2.0.0-notes.rst index d50797cb3..ca9bc4147 100644 --- a/doc/release/2.0.0-notes.rst +++ b/doc/release/2.0.0-notes.rst @@ -31,7 +31,7 @@ What works with NA: + ndarray.clip, ndarray.min, ndarray.max, ndarray.sum, ndarray.prod, ndarray.conjugate, ndarray.diagonal, ndarray.flatten + numpy.concatenate, numpy.column_stack, numpy.hstack, - numpy.vstack, numpy.dstack + numpy.vstack, numpy.dstack, numpy.squeeze What doesn't work with NA: * Fancy indexing, such as with lists and partial boolean masks. @@ -50,6 +50,19 @@ What doesn't work with NA: numpy.append, numpy.insert (relies on fancy indexing), numpy.where, +Differences with R: + * R's parameter rm.na=T is spelled skipna=True in NumPy. + * np.isna(nan) is False, but R's is.na(nan) is TRUE. This is because + NumPy's NA is treated independently of the underlying data type. + * Boolean indexing, where the result is compressed to just + the elements with true in the mask, raises if the booelan mask + has an NA value in it. This is because that value could be either + True or False, meaning the count of the output array is actually + NA. R treats this case in a manner inconsistent with the NA model, + returning NA values in the spots where the boolean index has NA. + This may have a practical advantage in spite of violating the + NA theoretical model, so NumPy could adopt the behavior if necessary + Custom formatter for printing arrays @@ -76,6 +89,11 @@ and depended in an undesirable way on the particular axis chosen for concatenation. A bug was also fixed which silently allowed out of bounds axis arguments. +The ufuncs logical_or, logical_and, and logical_not now follow Python's +behavior with object arrays, instead of trying to call methods on the +objects. For example the expression (3 and 'test') produces the string +'test', and now np.logical_and(np.array(3, 'O'), np.array('test', 'O')) +produces 'test' as well. Deprecations ============ |