numarray Manual

3.3 Convenience Functions

The numarray module provides, in addition to the functions which are needed to create the objects above, a set of powerful functions to manipulate arrays, select subsets of arrays based on the contents of other arrays, and other array-processing operations.

>>> data = arange(10)                   # analogous to builtin range()
>>> print data
[0 1 2 3 4 5 6 7 8 9]
>>> print where(greater(data, 5), -1, data)
[ 0  1  2  3  4  5 -1 -1 -1 -1]         # selection facility
>>> data = resize(array([0,1]), (9, 9)) # or just: data=resize([0,1], (9,9))
>>> print data
[[0 1 0 1 0 1 0 1 0]
 [1 0 1 0 1 0 1 0 1]
 [0 1 0 1 0 1 0 1 0]
 [1 0 1 0 1 0 1 0 1]
 [0 1 0 1 0 1 0 1 0]
 [1 0 1 0 1 0 1 0 1]
 [0 1 0 1 0 1 0 1 0]
 [1 0 1 0 1 0 1 0 1]
 [0 1 0 1 0 1 0 1 0]]

All of the functions which operate on numarray arrays are described in chapter 8. See page for more information about where and page for information on resize.

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