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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_unique( self ):
a = np.array( [5, 7, 1, 2, 1, 5, 7] )
ec = np.array( [1, 2, 5, 7] )
c = unique( a )
assert_array_equal( c, ec )
vals, indices = unique( a, return_index=True )
ed = np.array( [2, 3, 0, 1] )
assert_array_equal(vals, ec)
assert_array_equal(indices, ed)
vals, ind0, ind1 = unique( a, return_index=True,
return_inverse=True )
ee = np.array( [2, 3, 0, 1, 0, 2, 3] )
assert_array_equal(vals, ec)
assert_array_equal(ind0, ed)
assert_array_equal(ind1, ee)
assert_array_equal([], unique([]))
def test_intersect1d( self ):
# unique inputs
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, assume_unique=True )
assert_array_equal( c, ec )
# non-unique inputs
a = np.array( [5, 5, 7, 1, 2] )
b = np.array( [2, 1, 4, 3, 3, 1, 5] )
ed = np.array( [1, 2, 5] )
c = intersect1d( a, b )
assert_array_equal( c, ed )
assert_array_equal([], intersect1d([],[]))
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_in1d(self):
# we use two different sizes for the b array here to test the
# two different paths in in1d().
for mult in (1, 10):
a = np.array([5, 7, 1, 2])
b = np.array([2, 4, 3, 1, 5] * mult)
ec = np.array([True, False, True, True])
c = in1d(a, b, assume_unique=True)
assert_array_equal(c, ec)
a[0] = 8
ec = np.array([False, False, True, True])
c = in1d(a, b, assume_unique=True)
assert_array_equal(c, ec)
a[0], a[3] = 4, 8
ec = np.array([True, False, True, False])
c = in1d(a, b, assume_unique=True)
assert_array_equal(c, ec)
a = np.array([5, 4, 5, 3, 4, 4, 3, 4, 3, 5, 2, 1, 5, 5])
b = [2, 3, 4] * mult
ec = [False, True, False, True, True, True, True, True, True, False,
True, False, False, False]
c = in1d(a, b)
assert_array_equal(c, ec)
b = b + [5, 5, 4] * mult
ec = [True, True, True, True, True, True, True, True, True, True,
True, False, True, True]
c = in1d(a, b)
assert_array_equal(c, ec)
a = np.array([5, 7, 1, 2])
b = np.array([2, 4, 3, 1, 5] * mult)
ec = np.array([True, False, True, True])
c = in1d(a, b)
assert_array_equal(c, ec)
a = np.array([5, 7, 1, 1, 2])
b = np.array([2, 4, 3, 3, 1, 5] * mult)
ec = np.array([True, False, True, True, True])
c = in1d(a, b)
assert_array_equal(c, ec)
a = np.array([5, 5])
b = np.array([2, 2] * mult)
ec = np.array([False, False])
c = in1d(a, b)
assert_array_equal(c, ec)
a = np.array([5])
b = np.array([2])
ec = np.array([False])
c = in1d(a, b)
assert_array_equal(c, ec)
assert_array_equal(in1d([], []), [])
def test_in1d_char_array( self ):
a = np.array(['a', 'b', 'c','d','e','c','e','b'])
b = np.array(['a','c'])
ec = np.array([True, False, True, False, False, True, False, False])
c = in1d(a, b)
assert_array_equal(c, ec)
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, 7, 4] )
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 ):
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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