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float64_test.go
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float64_test.go
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package stat
/* float64_test.go
*
* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007 Jim Davies, Brian Gough
* Copyright (C) 2012, 2013 G.vd.Schoot
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
import (
"math"
"sort"
"testing"
)
// Main test routine
func testFloat64Slice(t *testing.T, stridea, strideb int) {
// sample sets of doubles
var i int
na := 14
nb := 14
rawa := Float64Slice{
.0421, .0941, .1064, .0242, .1331,
.0773, .0243, .0815, .1186, .0356,
.0728, .0999, .0614, .0479}
rawb := Float64Slice{
.1081, .0986, .1566, .1961, .1125,
.1942, .1079, .1021, .1583, .1673,
.1675, .1856, .1688, .1512}
raww := Float64Slice{
.0000, .0000, .0000, 3.000, .0000,
1.000, 1.000, 1.000, 0.000, .5000,
7.000, 5.000, 4.000, 0.123}
groupa_org := make(Float64Slice, stridea*na)
groupa := NewSortStrider(groupa_org, stridea)
groupb_org := make(Float64Slice, strideb*nb)
groupb := NewStrider(groupb_org, strideb)
w_org := make(Float64Slice, strideb*na)
w := NewStrider(w_org, strideb)
rel := 1e-10
for i = 0; i < na; i++ {
groupa_org[i*stridea] = rawa[i]
}
for i = 0; i < na; i++ {
w_org[i*strideb] = raww[i]
}
for i = 0; i < nb; i++ {
groupb_org[i*strideb] = rawb[i]
}
{
mean := Mean(groupa)
expected := 0.0728
gsl_test_rel(mean, expected, rel, "Mean()")
}
{
mean := Mean(groupa)
varc := VarianceWithFixedMean(groupa, mean)
expected := 0.00113837428571429
gsl_test_rel(varc, expected, rel, "VarianceWithFixedMean")
}
{
mean := Mean(groupa)
varc := SdWithFixedMean(groupa, mean)
expected := 0.0337398026922845
gsl_test_rel(varc, expected, rel, "SdWithFixedMean")
}
{
varc := Variance(groupb)
expected := 0.00124956615384615
gsl_test_rel(varc, expected, rel, "Variance")
}
{
sd := Sd(groupa)
expected := 0.0350134479659107
gsl_test_rel(sd, expected, rel, "Sd")
}
{
ss := Tss(groupb)
expected := 0.01624436
gsl_test_rel(ss, expected, rel, "Tss")
}
{
mean := Mean(groupa)
ss := TssMean(groupa, mean)
expected := 1.59372400000000e-02
gsl_test_rel(ss, expected, rel, "TssMean")
}
{
absdev := Absdev(groupa)
expected := 0.0287571428571429
gsl_test_rel(absdev, expected, rel, "Absdev")
}
{
skew := Skew(groupa)
expected := 0.0954642051479004
gsl_test_rel(skew, expected, rel, "Skew")
}
{
kurt := Kurtosis(groupa)
expected := -1.38583851548909
gsl_test_rel(kurt, expected, rel, "Kurtosis")
}
{
wmean := WMean(w, groupa)
expected := 0.0678111523670601
gsl_test_rel(wmean, expected, rel, "WMean")
}
{
wmean := WMean(w, groupa)
wvar := WVarianceWithFixedMean(w, groupa, wmean)
expected := 0.000615793060878654
gsl_test_rel(wvar, expected, rel, "WVarianceWithFixedMean")
}
{
est_wvar := WVariance(w, groupa)
expected := 0.000769562962860317
gsl_test_rel(est_wvar, expected, rel, "WVariance")
}
{
wsd := WSd(w, groupa)
expected := 0.0277409978706664
gsl_test_rel(wsd, expected, rel, "WSd")
}
{
wtss := WTss(w, groupa)
expected := 1.39310864162578e-02
gsl_test_rel(wtss, expected, rel, "WTss")
}
{
wmean := WMean(w, groupa)
wtss := WTssMean(w, groupa, wmean)
expected := 1.39310864162578e-02
gsl_test_rel(wtss, expected, rel, "WTssMean")
}
{
wabsdev := WAbsdev(w, groupa)
expected := 0.0193205027504008
gsl_test_rel(wabsdev, expected, rel, "WAbsdev")
}
{
wskew := WSkew(w, groupa)
expected := -0.373631000307076
gsl_test_rel(wskew, expected, rel, "WSkew")
}
{
wkurt := WKurtosis(w, groupa)
expected := -1.48114233353963
gsl_test_rel(wkurt, expected, rel, "WKurtosis")
}
{
c := Covariance(groupa, groupb)
expected := -0.000139021538461539
gsl_test_rel(c, expected, rel, "Covariance")
}
{
r := Correlation(groupa, groupb)
expected := -0.112322712666074171
gsl_test_rel(r, expected, rel, "Correlation")
}
{
pv := PVariance(groupa, groupb)
expected := 0.00123775384615385
gsl_test_rel(pv, expected, rel, "PVariance")
}
{
t := TTest(groupa, groupb)
expected := -5.67026326985851
gsl_test_rel(t, expected, rel, "TTest")
}
{
max, _ := Max(groupa)
expected := 0.1331
gsl_test(max != expected,
"Max (%g observed vs %g expected)",
max, expected)
}
{
min, _ := Min(groupa)
expected := 0.0242
gsl_test(min != expected,
"Min (%g observed vs %g expected)",
min, expected)
}
{
min, _, max, _ := Minmax(groupa)
expected_max := 0.1331
expected_min := 0.0242
gsl_test(max != expected_max,
"Minmax max (%g observed vs %g expected)",
max, expected_max)
gsl_test(min != expected_min,
"Minmax min (%g observed vs %g expected)",
min, expected_min)
}
{
_, max_index := Max(groupa)
expected := 4
gsl_test(max_index != expected,
"Max (%d observed vs %d expected)",
max_index, expected)
}
{
_, min_index := Min(groupa)
expected := 3
gsl_test(min_index != expected,
"Min (%d observed vs %d expected)",
min_index, expected)
}
{
_, min_index, _, max_index := Minmax(groupa)
expected_max_index := 4
expected_min_index := 3
gsl_test(max_index != expected_max_index,
"Minmax max (%u observed vs %u expected)",
max_index, expected_max_index)
gsl_test(min_index != expected_min_index,
"Minmax min (%u observed vs %u expected)",
min_index, expected_min_index)
}
sorted_org := make(Float64Slice, stridea*na)
sorted := NewSortStrider(sorted_org, stridea)
for i = 0; i < na; i++ {
sorted_org[i*stridea] = groupa.Get(i)
}
sort.Sort(sorted)
{
median := MedianFromSortedData(sorted)
expected := 0.07505
gsl_test_rel(median, expected, rel,
"MedianFromSortedData (even)")
}
{
zeroth := QuantileFromSortedData(sorted, 0.0)
expected := 0.0242
gsl_test_rel(zeroth, expected, rel,
"QuantileFromSortedData (0)")
}
{
top := QuantileFromSortedData(sorted, 1.0)
expected := 0.1331
gsl_test_rel(top, expected, rel,
"QuantileFromSortedData (100)")
}
{
median := QuantileFromSortedData(sorted, 0.5)
expected := 0.07505
gsl_test_rel(median, expected, rel,
"QuantileFromSortedData (50even)")
}
// Test for IEEE handling - set third element to NaN
groupa_org[3*stridea] = math.NaN()
{
max, max_index := Max(groupa)
expected := math.NaN()
expected_index := 3
gsl_test(!math.IsNaN(max),
"Max NaN (%g observed vs %g expected)",
max, expected)
gsl_test(max_index != expected_index,
"Max NaN index (%d observed vs %d expected)",
max_index, expected_index)
}
{
min, min_index := Min(groupa)
expected := math.NaN()
expected_index := 3
gsl_test(!math.IsNaN(min),
"Min NaN (%g observed vs %g expected)",
min, expected)
gsl_test(min_index != expected_index,
"Min NaN index (%d observed vs %d expected)",
min_index, expected_index)
}
{
min, min_index, max, max_index := Minmax(groupa)
expected_max := math.NaN()
expected_min := math.NaN()
expected_max_index := 3
expected_min_index := 3
gsl_test(!math.IsNaN(max),
"Minmax max NaN (%g observed vs %g expected)",
max, expected_max)
gsl_test(!math.IsNaN(min),
"Minmax min NaN (%g observed vs %g expected)",
min, expected_min)
gsl_test(max_index != expected_max_index,
"Minmax max index NaN (%u observed vs %u expected)",
max_index, expected_max_index)
gsl_test(min_index != expected_min_index,
"Minmax min index NaN (%u observed vs %u expected)",
min_index, expected_min_index)
}
}