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https://github.com/PHPOffice/PhpSpreadsheet.git
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gaoflow
e88cd615cc
The incomplete gamma primitive used a fixed 32-term power series with no convergence test, so GAMMA.DIST, GAMMADIST, CHISQ.DIST(.RT), GAMMAINV and CHISQ.INV were grossly wrong once the series argument reached ~32 (e.g. CHISQ.DIST.RT(80, 4) returned 0.806 instead of 1.74e-16). Replace it with the standard convergence-tested regularized incomplete gamma: series P(a,x) for x < a+1, continued fraction Q(a,x) for x >= a+1. CHISQ.DIST.RT now uses Q directly so the right tail stays free of 1 - P cancellation. Consolidates the duplicate copy that already existed privately in ChiSquared onto the shared primitive.
76 lines
1.2 KiB
PHP
76 lines
1.2 KiB
PHP
<?php
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declare(strict_types=1);
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return [
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[
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0.03263913041829,
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10.00001131, 9, 2, false,
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],
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[
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0.06809400387,
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10.00001131, 9, 2, true,
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],
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[
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0.112020903828,
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6, 3, 2, false,
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],
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[
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0.576809918873,
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6, 3, 2, true,
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],
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'Boolean as numeric' => [
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0.576809918873,
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6, 3, 2, 1,
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],
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// Large x/b: the old fixed 32-term series diverged badly here.
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'Large x mid-range' => [
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0.522481190430,
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35, 35, 1, true,
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],
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'Large x saturating' => [
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1.0,
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50, 2, 1, true,
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],
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[
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1.0,
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80, 2, 1, true,
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],
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[
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'#VALUE!',
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'NAN', 3, 2, true,
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],
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[
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'#VALUE!',
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6, 'NAN', 2, true,
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],
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[
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'#VALUE!',
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6, 3, 'NAN', true,
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],
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[
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'#VALUE!',
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6, 3, 2, 'NAN',
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],
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'Value < 0' => [
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'#NUM!',
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-6, 3, 2, true,
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],
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'A < 0' => [
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'#NUM!',
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6, -3, 2, true,
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],
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'A = 0' => [
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'#NUM!',
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6, 0, 2, true,
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],
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'B < 0' => [
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'#NUM!',
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6, 3, -2, true,
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],
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'B = 0' => [
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'#NUM!',
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6, 3, 0, true,
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],
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];
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