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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.
42 lines
779 B
PHP
42 lines
779 B
PHP
<?php
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declare(strict_types=1);
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return [
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[
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0.0152703571482,
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[[112, 76], [85, 95]],
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[[100, 85], [70, 90]],
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],
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[
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0.0003081920170083,
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[[58, 35], [11, 25], [10, 23]],
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[[45.35, 47.65], [17.56, 18.44], [16.09, 16.91]],
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],
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[
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0.015888560447,
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[[58], [11], [10]],
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[[45.35], [17.56], [16.09]],
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],
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[
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0.008682970191,
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[[58, 35]],
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[[45.35, 47.65]],
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],
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[
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'#NUM!',
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[[58, 11], [10, 35], [25]],
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[[45.35, 17.56], [16.09, 47.65], [18.44, 16.91]],
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],
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[
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'#DIV/0!',
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[[112, 76], [85, 95]],
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[[100, 0], [70, 90]],
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],
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[
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'#NUM!',
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[[112, 76], [85, 95]],
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[[100, 85], [-70, 90]],
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],
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];
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