# Bottleneck 0.4.0

Release date: 2011-03-08

The fourth release of Bottleneck contains new functions and bug fixes. Separate source code distributions are now made for 32 bit and 64 bit operating systems.

## New functions

- rankdata()

- nanrankdata()

## Enhancements

- Optionally specify the shapes of the arrays used in benchmark

- Can specify which input arrays to fill with one-third NaNs in benchmark

## Breaks from 0.3.0

- Removed group_nanmean() function

- Bump dependency from NumPy 1.4.1 to NumPy 1.5.1

- C files are now generated with Cython 0.14.1 instead of 0.13

## Bug fixes

- Some functions gave wrong output dtype for some input dtypes on 32 bit OS (#6)

- Some functions choked on size zero input arrays (#7)

- Segmentation fault with Cython 0.14.1 (but not 0.13) (#8)

## Contributors