polyfit.php File Reference

Go to the source code of this file.

Functions
	polyfit ($X, $Y, $n)
	printpoly ($C=null)

Variables
	$X = array(0,1,2,3,4,5)
	$Y = array(4,3,12,67,228, 579)
	$points = new Matrix(array($X, $Y))

Function Documentation

polyfit	(		$X,
			$Y,
			$n
	)

Definition at line 18 of file polyfit.php.

References $n, $X, and $Y.

                             {
        for ($i = 0; $i < sizeof($X); ++$i)
                for ($j = 0; $j <= $n; ++$j)
                        $A[$i][$j] = pow($X[$i], $j);
        for ($i=0; $i < sizeof($Y); ++$i)
                $B[$i] = array($Y[$i]);
        $matrixA = new Matrix($A);
        $matrixB = new Matrix($B);
        $C = $matrixA->solve($matrixB);
        return $C->getMatrix(0, $n, 0, 1);
}

printpoly

(

$C = null

)

Definition at line 30 of file polyfit.php.

                                {
        for($i = $C->m - 1; $i >= 0; --$i) {
                $r = $C->get($i, 0);
                if ( abs($r) <= pow(10, -9) )
                        $r = 0;
                if ($i == $C->m - 1)
                        echo $r . "x<sup>$i</sup>";
                else if ($i < $C->m - 1)
                        echo " + " . $r . "x<sup>$i</sup>";
                else if ($i == 0)
                        echo " + " . $r;
        }
}

Variable Documentation

$points = new Matrix(array($X, $Y))

Definition at line 46 of file polyfit.php.

Referenced by assAnswerMatchingPair\__construct(), assAnswerErrorText\__construct(), ilObjTestAccess\_isPassed(), ilMultipleChoiceWizardInputGUI\checkInput(), ilAnswerWizardInputGUI\checkInput(), ilSingleChoiceWizardInputGUI\checkInput(), assTextQuestionGUI\editQuestion(), assFileUploadGUI\editQuestion(), assOrderingHorizontalGUI\editQuestion(), assTextSubsetGUI\editQuestion(), assNumericGUI\editQuestion(), assJavaAppletGUI\editQuestion(), assFlashQuestionGUI\editQuestion(), assClozeTestGUI\editQuestion(), assOrderingQuestionGUI\editQuestion(), ilQuestionBrowserTableGUI\fillRow(), assNumericImport\fromXML(), assOrderingQuestionImport\fromXML(), ilSCORMCertificateAdapter\getCertificateVariablesForPresentation(), ilCourseObjectiveQuestion\getFinalTestPoints(), ilCourseObjectiveQuestion\getMaxPointsByObjective(), ilCourseObjectiveQuestion\getMaxPointsByTest(), ilTestServiceGUI\getPassListOfAnswersWithScoring(), ilCourseObjectiveQuestion\getSelfAssessmentPoints(), assTextSubsetGUI\getSolutionOutput(), assSingleChoiceGUI\getSolutionOutput(), assOrderingQuestionGUI\getSolutionOutput(), assMatchingQuestionGUI\getSolutionOutput(), assClozeTestGUI\getSolutionOutput(), ilTestOutputGUI\outQuestionSummary(), ilObjQuestionPoolGUI\propertiesObject(), assClozeGap\setItemPoints(), ilTestScoringGUI\setPointsManual(), assTextSubsetExport\toXML(), ilCourseObjectiveQuestion\updateLimits(), HTMLPurifier_AttrDef_HTML_Length\validate(), and assMatchingQuestionGUI\writePostData().

$X = array(0,1,2,3,4,5)

Definition at line 44 of file polyfit.php.

Referenced by TestMatrix\checkMatrices(), polyfit(), CholeskyDecomposition\solve(), QRDecomposition\solve(), LUDecomposition\solve(), TestMatrix\TestMatrix(), and tile().

$Y = array(4,3,12,67,228, 579)

Definition at line 45 of file polyfit.php.

Referenced by TestMatrix\checkMatrices(), ilBMFType_duration\mkduration(), polyfit(), and getid3_pcd\YCbCr2RGB().