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from __future__ import division, print_function, absolute_import
import numpy as np
import numpy.ma as ma
import scipy.stats.mstats as ms
from numpy.testing import (assert_equal, assert_almost_equal, assert_,
assert_allclose)
def test_compare_medians_ms():
x = np.arange(7)
y = x + 10
assert_almost_equal(ms.compare_medians_ms(x, y), 0)
y2 = np.linspace(0, 1, num=10)
assert_almost_equal(ms.compare_medians_ms(x, y2), 0.017116406778)
def test_hdmedian():
# 1-D array
x = ma.arange(11)
assert_allclose(ms.hdmedian(x), 5, rtol=1e-14)
x.mask = ma.make_mask(x)
x.mask[:7] = False
assert_allclose(ms.hdmedian(x), 3, rtol=1e-14)
# Check that `var` keyword returns a value. TODO: check whether returned
# value is actually correct.
assert_(ms.hdmedian(x, var=True).size == 2)
# 2-D array
x2 = ma.arange(22).reshape((11, 2))
assert_allclose(ms.hdmedian(x2, axis=0), [10, 11])
x2.mask = ma.make_mask(x2)
x2.mask[:7, :] = False
assert_allclose(ms.hdmedian(x2, axis=0), [6, 7])
def test_rsh():
np.random.seed(132345)
x = np.random.randn(100)
res = ms.rsh(x)
# Just a sanity check that the code runs and output shape is correct.
# TODO: check that implementation is correct.
assert_(res.shape == x.shape)
# Check points keyword
res = ms.rsh(x, points=[0, 1.])
assert_(res.size == 2)
def test_mjci():
# Tests the Marits-Jarrett estimator
data = ma.array([77, 87, 88,114,151,210,219,246,253,262,
296,299,306,376,428,515,666,1310,2611])
assert_almost_equal(ms.mjci(data),[55.76819,45.84028,198.87875],5)
def test_trimmed_mean_ci():
# Tests the confidence intervals of the trimmed mean.
data = ma.array([545,555,558,572,575,576,578,580,
594,605,635,651,653,661,666])
assert_almost_equal(ms.trimmed_mean(data,0.2), 596.2, 1)
assert_equal(np.round(ms.trimmed_mean_ci(data,(0.2,0.2)),1),
[561.8, 630.6])
def test_idealfourths():
# Tests ideal-fourths
test = np.arange(100)
assert_almost_equal(np.asarray(ms.idealfourths(test)),
[24.416667,74.583333],6)
test_2D = test.repeat(3).reshape(-1,3)
assert_almost_equal(ms.idealfourths(test_2D, axis=0),
[[24.416667,24.416667,24.416667],
[74.583333,74.583333,74.583333]],6)
assert_almost_equal(ms.idealfourths(test_2D, axis=1),
test.repeat(2).reshape(-1,2))
test = [0, 0]
_result = ms.idealfourths(test)
assert_(np.isnan(_result).all())
class TestQuantiles(object):
data = [0.706560797,0.727229578,0.990399276,0.927065621,0.158953014,
0.887764025,0.239407086,0.349638551,0.972791145,0.149789972,
0.936947700,0.132359948,0.046041972,0.641675031,0.945530547,
0.224218684,0.771450991,0.820257774,0.336458052,0.589113496,
0.509736129,0.696838829,0.491323573,0.622767425,0.775189248,
0.641461450,0.118455200,0.773029450,0.319280007,0.752229111,
0.047841438,0.466295911,0.583850781,0.840581845,0.550086491,
0.466470062,0.504765074,0.226855960,0.362641207,0.891620942,
0.127898691,0.490094097,0.044882048,0.041441695,0.317976349,
0.504135618,0.567353033,0.434617473,0.636243375,0.231803616,
0.230154113,0.160011327,0.819464108,0.854706985,0.438809221,
0.487427267,0.786907310,0.408367937,0.405534192,0.250444460,
0.995309248,0.144389588,0.739947527,0.953543606,0.680051621,
0.388382017,0.863530727,0.006514031,0.118007779,0.924024803,
0.384236354,0.893687694,0.626534881,0.473051932,0.750134705,
0.241843555,0.432947602,0.689538104,0.136934797,0.150206859,
0.474335206,0.907775349,0.525869295,0.189184225,0.854284286,
0.831089744,0.251637345,0.587038213,0.254475554,0.237781276,
0.827928620,0.480283781,0.594514455,0.213641488,0.024194386,
0.536668589,0.699497811,0.892804071,0.093835427,0.731107772]
def test_hdquantiles(self):
data = self.data
assert_almost_equal(ms.hdquantiles(data,[0., 1.]),
[0.006514031, 0.995309248])
hdq = ms.hdquantiles(data,[0.25, 0.5, 0.75])
assert_almost_equal(hdq, [0.253210762, 0.512847491, 0.762232442,])
hdq = ms.hdquantiles_sd(data,[0.25, 0.5, 0.75])
assert_almost_equal(hdq, [0.03786954, 0.03805389, 0.03800152,], 4)
data = np.array(data).reshape(10,10)
hdq = ms.hdquantiles(data,[0.25,0.5,0.75],axis=0)
assert_almost_equal(hdq[:,0], ms.hdquantiles(data[:,0],[0.25,0.5,0.75]))
assert_almost_equal(hdq[:,-1], ms.hdquantiles(data[:,-1],[0.25,0.5,0.75]))
hdq = ms.hdquantiles(data,[0.25,0.5,0.75],axis=0,var=True)
assert_almost_equal(hdq[...,0],
ms.hdquantiles(data[:,0],[0.25,0.5,0.75],var=True))
assert_almost_equal(hdq[...,-1],
ms.hdquantiles(data[:,-1],[0.25,0.5,0.75], var=True))
def test_hdquantiles_sd(self):
# Only test that code runs, implementation not checked for correctness
res = ms.hdquantiles_sd(self.data)
assert_(res.size == 3)
def test_mquantiles_cimj(self):
# Only test that code runs, implementation not checked for correctness
ci_lower, ci_upper = ms.mquantiles_cimj(self.data)
assert_(ci_lower.size == ci_upper.size == 3)
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