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""" Test functions for matrix module
"""
from numpy.testing import *
set_package_path()
from numpy import arange, rot90, add, fliplr, flipud, zeros, ones, eye, \
array, diag
restore_path()
##################################################
def get_mat(n):
data = arange(n)
data = add.outer(data,data)
return data
class test_eye(ScipyTestCase):
def check_basic(self):
assert_equal(eye(4),array([[1,0,0,0],
[0,1,0,0],
[0,0,1,0],
[0,0,0,1]]))
assert_equal(eye(4,dtype='f'),array([[1,0,0,0],
[0,1,0,0],
[0,0,1,0],
[0,0,0,1]],'f'))
def check_diag(self):
assert_equal(eye(4,k=1),array([[0,1,0,0],
[0,0,1,0],
[0,0,0,1],
[0,0,0,0]]))
assert_equal(eye(4,k=-1),array([[0,0,0,0],
[1,0,0,0],
[0,1,0,0],
[0,0,1,0]]))
def check_2d(self):
assert_equal(eye(4,3),array([[1,0,0],
[0,1,0],
[0,0,1],
[0,0,0]]))
assert_equal(eye(3,4),array([[1,0,0,0],
[0,1,0,0],
[0,0,1,0]]))
def check_diag2d(self):
assert_equal(eye(3,4,k=2),array([[0,0,1,0],
[0,0,0,1],
[0,0,0,0]]))
assert_equal(eye(4,3,k=-2),array([[0,0,0],
[0,0,0],
[1,0,0],
[0,1,0]]))
class test_diag(ScipyTestCase):
def check_vector(self):
vals = (100*arange(5)).astype('l')
b = zeros((5,5))
for k in range(5):
b[k,k] = vals[k]
assert_equal(diag(vals),b)
b = zeros((7,7))
c = b.copy()
for k in range(5):
b[k,k+2] = vals[k]
c[k+2,k] = vals[k]
assert_equal(diag(vals,k=2), b)
assert_equal(diag(vals,k=-2), c)
def check_matrix(self):
vals = (100*get_mat(5)+1).astype('l')
b = zeros((5,))
for k in range(5):
b[k] = vals[k,k]
assert_equal(diag(vals),b)
b = b*0
for k in range(3):
b[k] = vals[k,k+2]
assert_equal(diag(vals,2),b[:3])
for k in range(3):
b[k] = vals[k+2,k]
assert_equal(diag(vals,-2),b[:3])
class test_fliplr(ScipyTestCase):
def check_basic(self):
self.failUnlessRaises(ValueError, fliplr, ones(4))
a = get_mat(4)
b = a[:,::-1]
assert_equal(fliplr(a),b)
a = [[0,1,2],
[3,4,5]]
b = [[2,1,0],
[5,4,3]]
assert_equal(fliplr(a),b)
class test_flipud(ScipyTestCase):
def check_basic(self):
a = get_mat(4)
b = a[::-1,:]
assert_equal(flipud(a),b)
a = [[0,1,2],
[3,4,5]]
b = [[3,4,5],
[0,1,2]]
assert_equal(flipud(a),b)
class test_rot90(ScipyTestCase):
def check_basic(self):
self.failUnlessRaises(ValueError, rot90, ones(4))
a = [[0,1,2],
[3,4,5]]
b1 = [[2,5],
[1,4],
[0,3]]
b2 = [[5,4,3],
[2,1,0]]
b3 = [[3,0],
[4,1],
[5,2]]
b4 = [[0,1,2],
[3,4,5]]
for k in range(-3,13,4):
assert_equal(rot90(a,k=k),b1)
for k in range(-2,13,4):
assert_equal(rot90(a,k=k),b2)
for k in range(-1,13,4):
assert_equal(rot90(a,k=k),b3)
for k in range(0,13,4):
assert_equal(rot90(a,k=k),b4)
if __name__ == "__main__":
ScipyTest().run()
|
