def test_weightstats_2(self):
x1, x2 = self.x1, self.x2
w1, w2 = self.w1, self.w2
d1 = DescrStatsW(x1)
d1w = DescrStatsW(x1, weights=w1)
d2w = DescrStatsW(x2, weights=w2)
x1r = d1w.asrepeats()
x2r = d2w.asrepeats()
# print 'random weights'
# print ttest_ind(x1, x2, weights=(w1, w2))
# print stats.ttest_ind(x1r, x2r)
assert_almost_equal(
ttest_ind(x1, x2, weights=(w1, w2))[:2], stats.ttest_ind(x1r, x2r),
14)
#not the same as new version with random weights/replication
# assert x1r.shape[0] == d1w.sum_weights
# assert x2r.shape[0] == d2w.sum_weights
assert_almost_equal(x2r.var(), d2w.var, 14)
assert_almost_equal(x2r.std(), d2w.std, 14)
#one-sample tests
# print d1.ttest_mean(3)
# print stats.ttest_1samp(x1, 3)
# print d1w.ttest_mean(3)
# print stats.ttest_1samp(x1r, 3)
assert_almost_equal(d1.ttest_mean(3)[:2], stats.ttest_1samp(x1, 3), 11)
assert_almost_equal(
d1w.ttest_mean(3)[:2], stats.ttest_1samp(x1r, 3), 11)
def test_weightstats_3(self):
x1_2d, x2_2d = self.x1_2d, self.x2_2d
w1, w2 = self.w1, self.w2
d1w_2d = DescrStatsW(x1_2d, weights=w1)
d2w_2d = DescrStatsW(x2_2d, weights=w2)
x1r_2d = d1w_2d.asrepeats()
x2r_2d = d2w_2d.asrepeats()
# print d1w_2d.ttest_mean(3)
# #scipy.stats.ttest is also vectorized
# print stats.ttest_1samp(x1r_2d, 3)
t,p,d = d1w_2d.ttest_mean(3)
assert_almost_equal([t, p], stats.ttest_1samp(x1r_2d, 3), 11)
#print [stats.ttest_1samp(xi, 3) for xi in x1r_2d.T]
ressm = CompareMeans(d1w_2d, d2w_2d).ttest_ind()
resss = stats.ttest_ind(x1r_2d, x2r_2d)
assert_almost_equal(ressm[:2], resss, 14)
def test_weightstats_2(self):
x1, x2 = self.x1, self.x2
w1, w2 = self.w1, self.w2
d1 = DescrStatsW(x1)
d1w = DescrStatsW(x1, weights=w1)
d2w = DescrStatsW(x2, weights=w2)
x1r = d1w.asrepeats()
x2r = d2w.asrepeats()
# print 'random weights'
# print ttest_ind(x1, x2, weights=(w1, w2))
# print stats.ttest_ind(x1r, x2r)
assert_almost_equal(ttest_ind(x1, x2, weights=(w1, w2))[:2],
stats.ttest_ind(x1r, x2r), 14)
#not the same as new version with random weights/replication
# assert x1r.shape[0] == d1w.sum_weights
# assert x2r.shape[0] == d2w.sum_weights
assert_almost_equal(x2r.var(), d2w.var, 14)
assert_almost_equal(x2r.std(), d2w.std, 14)
#one-sample tests
# print d1.ttest_mean(3)
# print stats.ttest_1samp(x1, 3)
# print d1w.ttest_mean(3)
# print stats.ttest_1samp(x1r, 3)
assert_almost_equal(d1.ttest_mean(3)[:2], stats.ttest_1samp(x1, 3), 11)
assert_almost_equal(d1w.ttest_mean(3)[:2], stats.ttest_1samp(x1r, 3), 11)
def test_weightstats_1(self):
x1, x2 = self.x1, self.x2
w1, w2 = self.w1, self.w2
w1_ = 2. * np.ones(len(x1))
w2_ = 2. * np.ones(len(x2))
d1 = DescrStatsW(x1)
# print ttest_ind(x1, x2)
# print ttest_ind(x1, x2, usevar='separate')
# #print ttest_ind(x1, x2, usevar='separate')
# print stats.ttest_ind(x1, x2)
# print ttest_ind(x1, x2, usevar='separate', alternative='larger')
# print ttest_ind(x1, x2, usevar='separate', alternative='smaller')
# print ttest_ind(x1, x2, usevar='separate', weights=(w1_, w2_))
# print stats.ttest_ind(np.r_[x1, x1], np.r_[x2,x2])
assert_almost_equal(
ttest_ind(x1, x2, weights=(w1_, w2_))[:2],
stats.ttest_ind(np.r_[x1, x1], np.r_[x2, x2]))
def test_weightstats_3(self):
x1_2d, x2_2d = self.x1_2d, self.x2_2d
w1, w2 = self.w1, self.w2
d1w_2d = DescrStatsW(x1_2d, weights=w1)
d2w_2d = DescrStatsW(x2_2d, weights=w2)
x1r_2d = d1w_2d.asrepeats()
x2r_2d = d2w_2d.asrepeats()
# print d1w_2d.ttest_mean(3)
# #scipy.stats.ttest is also vectorized
# print stats.ttest_1samp(x1r_2d, 3)
t, p, d = d1w_2d.ttest_mean(3)
assert_almost_equal([t, p], stats.ttest_1samp(x1r_2d, 3), 11)
#print [stats.ttest_1samp(xi, 3) for xi in x1r_2d.T]
ressm = CompareMeans(d1w_2d, d2w_2d).ttest_ind()
resss = stats.ttest_ind(x1r_2d, x2r_2d)
assert_almost_equal(ressm[:2], resss, 14)