la 0.3, the labeled array

Written for larry by kwgoodman on 2010-06-04

The main class of the la package is a labeled array, larry. A larry consists of data and labels. The data is stored as a NumPy array and the labels as a list of lists (one list per dimension).

Alignment by label is automatic when you add (or subtract, multiply, divide) two larrys.

larry adds the convenience of labels, provides many built-in methods, and let's you use many of your existing array functions.

Download: http://pypi.python.org/pypi/la
docs  http://larry.sourceforge.net
code  https://launchpad.net/larry

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Release Notes
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la 0.3 (banana)
===============

*Release date: 2010-06-04*

New larry methods
-----------------
- astype: Copy of larry cast to specified type
- geometric_mean: new method based on existing array function

New functions
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- la.util.resample.cross_validation: k-fold cross validation index iterator
- la.util.resample.bootstrap: bootstrap index iterator
- la.util.misc.listmap: O(n) version of map(list1.index, list2)
- la/src/clistmap.pyx: Cython version of listmap with python fallback

Enhancements
------------
- Major performance boost in most larry methods!
- You can now use an optional dtype when creating larrys
- You can now optionally skip the integrity test when creating a new larry
- Add ability to compare (==, >, !=, etc) larrys with lists and tuples
- Documentation and unit tests

Breakage from la 0.2
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- lastrank and lastrank_decay methods combined into one method: lastrank
- Given shape (n,m) input, lastrank now returns shape (n,) instead of (n,1)
- geometric_mean now reduces input in the same way as lastrank (see above)

Bug fixes
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- #571813 Three larry methods crashed on 1d input
- #571737 skiprows missing from parameters section of the fromcsv doc string
- #571899 label indexing fails when larry is 3d and index is a tuple of len 2
- #571830 prod, cumprod, and cumsum did not return NaN for all-NaN input
- #572638 lastrank chokes on input with a shape tuple that contains zero
- #573240 Reduce methods give wrong output with shapes that contain zero
- #582579 la.afunc.nans: wrong output for str and object dtype
- #583596 assert_larry_equal crashed when comparing float larry to str larry
- #585694 cumsum and cumprod crashed on dtype=int

Details
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For further details see the change log in la/ChangeLog.