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""" Test functions for 1D array set operations.
"""
from numpy.testing import *
import numpy as np
from numpy.lib.arraysetops import *
import warnings
class TestAso(TestCase):
def test_unique1d( self ):
a = np.array( [5, 7, 1, 2, 1, 5, 7] )
ec = np.array( [1, 2, 5, 7] )
c = unique1d( a )
assert_array_equal( c, ec )
warnings.simplefilter('ignore', Warning)
unique, indices = unique1d( a, return_index=True )
warnings.resetwarnings()
ed = np.array( [2, 3, 0, 1] )
assert_array_equal(unique, ec)
assert_array_equal(indices, ed)
assert_array_equal([], unique1d([]))
def test_intersect1d( self ):
a = np.array( [5, 7, 1, 2] )
b = np.array( [2, 4, 3, 1, 5] )
ec = np.array( [1, 2, 5] )
c = intersect1d( a, b )
assert_array_equal( c, ec )
assert_array_equal([], intersect1d([],[]))
def test_intersect1d_nu( self ):
a = np.array( [5, 5, 7, 1, 2] )
b = np.array( [2, 1, 4, 3, 3, 1, 5] )
ec = np.array( [1, 2, 5] )
c = intersect1d_nu( a, b )
assert_array_equal( c, ec )
assert_array_equal([], intersect1d_nu([],[]))
def test_setxor1d( self ):
a = np.array( [5, 7, 1, 2] )
b = np.array( [2, 4, 3, 1, 5] )
ec = np.array( [3, 4, 7] )
c = setxor1d( a, b )
assert_array_equal( c, ec )
a = np.array( [1, 2, 3] )
b = np.array( [6, 5, 4] )
ec = np.array( [1, 2, 3, 4, 5, 6] )
c = setxor1d( a, b )
assert_array_equal( c, ec )
a = np.array( [1, 8, 2, 3] )
b = np.array( [6, 5, 4, 8] )
ec = np.array( [1, 2, 3, 4, 5, 6] )
c = setxor1d( a, b )
assert_array_equal( c, ec )
assert_array_equal([], setxor1d([],[]))
def test_ediff1d(self):
zero_elem = np.array([])
one_elem = np.array([1])
two_elem = np.array([1,2])
assert_array_equal([],ediff1d(zero_elem))
assert_array_equal([0],ediff1d(zero_elem,to_begin=0))
assert_array_equal([0],ediff1d(zero_elem,to_end=0))
assert_array_equal([-1,0],ediff1d(zero_elem,to_begin=-1,to_end=0))
assert_array_equal([],ediff1d(one_elem))
assert_array_equal([1],ediff1d(two_elem))
def test_setmember1d( self ):
a = np.array( [5, 7, 1, 2] )
b = np.array( [2, 4, 3, 1, 5] )
ec = np.array( [True, False, True, True] )
c = setmember1d( a, b )
assert_array_equal( c, ec )
a[0] = 8
ec = np.array( [False, False, True, True] )
c = setmember1d( a, b )
assert_array_equal( c, ec )
a[0], a[3] = 4, 8
ec = np.array( [True, False, True, False] )
c = setmember1d( a, b )
assert_array_equal( c, ec )
assert_array_equal([], setmember1d([],[]))
def test_union1d( self ):
a = np.array( [5, 4, 7, 1, 2] )
b = np.array( [2, 4, 3, 3, 2, 1, 5] )
ec = np.array( [1, 2, 3, 4, 5, 7] )
c = union1d( a, b )
assert_array_equal( c, ec )
assert_array_equal([], union1d([],[]))
def test_setdiff1d( self ):
a = np.array( [6, 5, 4, 7, 1, 2] )
b = np.array( [2, 4, 3, 3, 2, 1, 5] )
ec = np.array( [6, 7] )
c = setdiff1d( a, b )
assert_array_equal( c, ec )
a = np.arange( 21 )
b = np.arange( 19 )
ec = np.array( [19, 20] )
c = setdiff1d( a, b )
assert_array_equal( c, ec )
assert_array_equal([], setdiff1d([],[]))
def test_setdiff1d_char_array(self):
a = np.array(['a','b','c'])
b = np.array(['a','b','s'])
assert_array_equal(setdiff1d(a,b),np.array(['c']))
def test_manyways( self ):
nItem = 100
a = np.fix( nItem / 10 * np.random.random( nItem ) )
b = np.fix( nItem / 10 * np.random.random( nItem ) )
c1 = intersect1d_nu( a, b )
c2 = unique1d( intersect1d( a, b ) )
assert_array_equal( c1, c2 )
a = np.array( [5, 7, 1, 2, 8] )
b = np.array( [9, 8, 2, 4, 3, 1, 5] )
c1 = setxor1d( a, b )
aux1 = intersect1d( a, b )
aux2 = union1d( a, b )
c2 = setdiff1d( aux2, aux1 )
assert_array_equal( c1, c2 )
if __name__ == "__main__":
run_module_suite()
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