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#! /usr/bin/env python
# Last Change: Fri Dec 15 10:00 PM 2006 J
from numpy.testing import *
import numpy as N
set_package_path()
from cdavid.segmentaxis import segment_axis
restore_path()
# #Optional:
# set_local_path()
# # import modules that are located in the same directory as this file.
# restore_path()
class test_segment(NumpyTestCase):
def check_simple(self):
assert_equal(segment_axis(N.arange(6),length=3,overlap=0),
N.array([[0,1,2],[3,4,5]]))
assert_equal(segment_axis(N.arange(7),length=3,overlap=1),
N.array([[0,1,2],[2,3,4],[4,5,6]]))
assert_equal(segment_axis(N.arange(7),length=3,overlap=2),
N.array([[0,1,2],[1,2,3],[2,3,4],[3,4,5],[4,5,6]]))
def check_error_checking(self):
self.assertRaises(ValueError,
lambda: segment_axis(N.arange(7),length=3,overlap=-1))
self.assertRaises(ValueError,
lambda: segment_axis(N.arange(7),length=0,overlap=0))
self.assertRaises(ValueError,
lambda: segment_axis(N.arange(7),length=3,overlap=3))
self.assertRaises(ValueError,
lambda: segment_axis(N.arange(7),length=8,overlap=3))
def check_ending(self):
assert_equal(segment_axis(N.arange(6),length=3,overlap=1,end='cut'),
N.array([[0,1,2],[2,3,4]]))
assert_equal(segment_axis(N.arange(6),length=3,overlap=1,end='wrap'),
N.array([[0,1,2],[2,3,4],[4,5,0]]))
assert_equal(segment_axis(N.arange(6),length=3,overlap=1,end='pad',endvalue=-17),
N.array([[0,1,2],[2,3,4],[4,5,-17]]))
def check_multidimensional(self):
assert_equal(segment_axis(N.ones((2,3,4,5,6)),axis=3,length=3,overlap=1).shape,
(2,3,4,2,3,6))
assert_equal(segment_axis(N.ones((2,5,4,3,6)).swapaxes(1,3),axis=3,length=3,overlap=1).shape,
(2,3,4,2,3,6))
assert_equal(segment_axis(N.ones((2,3,4,5,6)),axis=2,length=3,overlap=1,end='cut').shape,
(2,3,1,3,5,6))
assert_equal(segment_axis(N.ones((2,3,4,5,6)),axis=2,length=3,overlap=1,end='wrap').shape,
(2,3,2,3,5,6))
assert_equal(segment_axis(N.ones((2,3,4,5,6)),axis=2,length=3,overlap=1,end='pad').shape,
(2,3,2,3,5,6))
if __name__=='__main__':
NumpyTest().run()
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