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Trend Tests

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This commit is contained in:
oleibman
2025-12-12 00:26:29 -08:00
parent 32161a7699
commit 9878dfb940
1 changed files with 29 additions and 0 deletions
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tests/PhpSpreadsheetTests/Shared/Trend/ExponentialBestFitTest.php
+29
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@@ -9,6 +9,10 @@ use PHPUnit\Framework\TestCase;
class ExponentialBestFitTest extends TestCase
{
private const EBF_PRECISION6 = 1.0E-6;
private const EBF_PRECISION5 = 1.0E-5;
private const DP = 4;
/**
* @param array<mixed> $expectedSlope
* @param array<mixed> $expectedIntersect
@@ -28,6 +32,31 @@ class ExponentialBestFitTest extends TestCase
$bestFit = new ExponentialBestFit($yValues, $xValues);
$slope = $bestFit->getSlope(1);
self::assertEquals($expectedSlope[0], $slope);
self::assertFalse($bestFit->getError());
self::assertEqualsWithDelta(0.2117, $bestFit->getSlopeSE(self::DP), self::EBF_PRECISION5);
self::assertEqualsWithDelta(1.5380, $bestFit->getIntersectSE(self::DP), self::EBF_PRECISION5);
self::assertEqualsWithDelta(
90.486819,
$bestFit->getGoodnessOfFitPercent(),
self::EBF_PRECISION6
);
self::assertEqualsWithDelta(
90.4868,
$bestFit->getGoodnessOfFitPercent(self::DP),
self::EBF_PRECISION5
);
self::assertEqualsWithDelta(2.3031, $bestFit->getStdevOfResiduals(self::DP), self::EBF_PRECISION5);
self::assertEqualsWithDelta(403.6333, $bestFit->getSSRegression(self::DP), self::EBF_PRECISION5);
self::assertEqualsWithDelta(42.4353, $bestFit->getSSResiduals(self::DP), self::EBF_PRECISION5);
self::assertEqualsWithDelta(8, $bestFit->getDFResiduals(self::DP), self::EBF_PRECISION5);
self::assertEqualsWithDelta(76.0938, $bestFit->getF(self::DP), self::EBF_PRECISION5);
self::assertEqualsWithDelta(-13.1, $bestFit->getCovariance(self::DP), self::EBF_PRECISION5);
self::assertEqualsWithDelta(-0.919, $bestFit->getCorrelation(self::DP), self::EBF_PRECISION5);
$values = $bestFit->getYBestFitValues();
self::assertCount(10, $values);
self::assertEqualsWithDelta(3.965445, $values[0], self::EBF_PRECISION6);
$slope = $bestFit->getSlope();
self::assertEquals($expectedSlope[1], $slope);
$intersect = $bestFit->getIntersect(1);