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Diffstat (limited to 'doc/release/1.10.0-notes.rst')
| -rw-r--r-- | doc/release/1.10.0-notes.rst | 33 |
1 files changed, 30 insertions, 3 deletions
diff --git a/doc/release/1.10.0-notes.rst b/doc/release/1.10.0-notes.rst index 6a6bbd4c6..c4ff2e4b4 100644 --- a/doc/release/1.10.0-notes.rst +++ b/doc/release/1.10.0-notes.rst @@ -14,6 +14,9 @@ Highlights * Addition of *np.linalg.multi_dot*: compute the dot product of two or more arrays in a single function call, while automatically selecting the fastest evaluation order. +* The new function `np.stack` provides a general interface for joining a + sequence of arrays along a new axis, complementing `np.concatenate` for + joining along an existing axis. * Addition of `nanprod` to the set of nanfunctions. @@ -91,7 +94,7 @@ New Features Reading extra flags from site.cfg ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -Previously customization of compilation of dependency libraries and numpy +Previously customization of compilation of dependency libraries and numpy itself was only accomblishable via code changes in the distutils package. Now numpy.distutils reads in the following extra flags from each group of the *site.cfg*: @@ -116,8 +119,8 @@ extensions is now performed in *n* parallel processes. The parallelization is limited to files within one extension so projects using Cython will not profit because it builds extensions from single files. -*genfromtxt* has an new ``max_rows`` argument -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +*genfromtxt* has a new ``max_rows`` argument +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ A ``max_rows`` argument has been added to *genfromtxt* to limit the number of rows read in a single call. Using this functionality, it is possible to read in multiple arrays stored in a single file by making @@ -142,6 +145,14 @@ you will not be able to emit the warning or test it. The context manager ``clear_and_catch_warnings`` clears warnings from the module registry on entry and resets them on exit, meaning that warnings can be re-raised. +*cov* has new ``fweights`` and ``aweights`` arguments +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The ``fweights`` and ``aweights`` arguments add new functionality to +covariance calculations by applying two types of weighting to observation +vectors. An array of ``fweights`` indicates the number of repeats of each +observation vector, and an array of ``aweights`` provides their relative +importance or probability. + Improvements ============ @@ -278,3 +289,19 @@ Because we are deprecating the ``bias`` argument to ``ma.corrcoef``, we also deprecate the use of the ``allow_masked`` argument as a positional argument, as its position will change with the removal of ``bias``. ``allow_masked`` will in due course become a keyword-only argument. + +dtype string representation changes +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Since 1.6, creating a dtype object from its string representation, e.g. +``'f4'``, would issue a deprecation warning if the size did not correspond +to an existing type, and default to creating a dtype of the default size +for the type. Starting with this release, this will now raise a ``TypeError``. + +The only exception is object dtypes, where both ``'O4'`` and ``'O8'`` will +still issue a deprecation warning. This platform-dependent representation +will raise an error in the next release. + +In preparation for this upcoming change, the string representation of an +object dtype, i.e. ``np.dtype(object).str``, no longer includes the item +size, i.e. will return ``'|O'`` instead of ``'|O4'`` or ``'|O8'`` as +before. |