mirror of
https://github.com/ncruces/go-sqlite3.git
synced 2026-01-12 05:59:14 +00:00
88 lines
1.9 KiB
Go
88 lines
1.9 KiB
Go
package stats
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import (
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"math"
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"testing"
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)
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func Test_moments(t *testing.T) {
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t.Parallel()
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var s1 moments
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s1.enqueue(1)
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s1.dequeue(1)
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if !math.IsNaN(s1.skewness_pop()) {
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t.Errorf("want NaN")
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}
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if !math.IsNaN(s1.raw_kurtosis_pop()) {
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t.Errorf("want NaN")
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}
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s1.enqueue(+0.5377)
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s1.enqueue(+1.8339)
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s1.enqueue(-2.2588)
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s1.enqueue(+0.8622)
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s1.enqueue(+0.3188)
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s1.enqueue(-1.3077)
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s1.enqueue(-0.4336)
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s1.enqueue(+0.3426)
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s1.enqueue(+3.5784)
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s1.enqueue(+2.7694)
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if got := s1.skewness_pop(); float32(got) != 0.106098293 {
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t.Errorf("got %v, want 0.1061", got)
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}
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if got := s1.skewness_samp(); float32(got) != 0.1258171 {
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t.Errorf("got %v, want 0.1258", got)
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}
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if got := s1.raw_kurtosis_pop(); float32(got) != 2.3121266 {
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t.Errorf("got %v, want 2.3121", got)
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}
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if got := s1.raw_kurtosis_samp(); float32(got) != 2.7482237 {
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t.Errorf("got %v, want 2.7483", got)
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}
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var s2 welford
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s2.enqueue(+0.5377)
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s2.enqueue(+1.8339)
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s2.enqueue(-2.2588)
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s2.enqueue(+0.8622)
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s2.enqueue(+0.3188)
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s2.enqueue(-1.3077)
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s2.enqueue(-0.4336)
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s2.enqueue(+0.3426)
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s2.enqueue(+3.5784)
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s2.enqueue(+2.7694)
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if got, want := s1.mean(), s2.mean(); got != want {
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t.Errorf("got %v, want %v", got, want)
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}
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if got, want := s1.stddev_pop(), s2.stddev_pop(); got != want {
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t.Errorf("got %v, want %v", got, want)
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}
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if got, want := s1.stddev_samp(), s2.stddev_samp(); got != want {
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t.Errorf("got %v, want %v", got, want)
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}
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s1.enqueue(math.Pi)
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s1.enqueue(math.Sqrt2)
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s1.enqueue(math.E)
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s1.dequeue(math.Pi)
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s1.dequeue(math.E)
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s1.dequeue(math.Sqrt2)
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if got := s1.skewness_pop(); float32(got) != 0.106098293 {
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t.Errorf("got %v, want 0.1061", got)
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}
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if got := s1.skewness_samp(); float32(got) != 0.1258171 {
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t.Errorf("got %v, want 0.1258", got)
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}
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if got := s1.raw_kurtosis_pop(); float32(got) != 2.3121266 {
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t.Errorf("got %v, want 2.3121", got)
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}
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if got := s1.raw_kurtosis_samp(); float32(got) != 2.7482237 {
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t.Errorf("got %v, want 2.7483", got)
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}
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}
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