102 lines
2.7 KiB
PHP
102 lines
2.7 KiB
PHP
<?php
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require_once('./polynomial/XY_Plot.php' );
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function plotRenderData( $data, $color )
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{
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global $plot;
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$plot->resetData();
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foreach ( $data as $point )
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$plot->addData( $point[ 0 ], $point[ 1 ] );
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$plot->setColor( $color );
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$plot->autoScaleX_MinMax( 0 );
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$plot->autoScaleY_MinMax( 1 );
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}
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function textCallback( $Value )
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{
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return number_format( $Value, 1 );
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}
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function plotAddScale()
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{
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global $plot;
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global $X_MajorScale;
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global $X_MinorScale;
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global $Y_MajorScale;
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global $Y_MinorScale;
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global $colorMap;
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// Setup and draw minor horizontal scale (right to left).
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$plot->SetX_MinorDivisionScale( $X_MinorScale );
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$plot->SetX_MinorDivisionColor( $colorMap[ "Gray90" ] );
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$plot->DrawX_MinorDivisions();
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// Setup and draw minor vertical scale (top to bottom).
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$plot->SetY_MinorDivisionScale( $Y_MinorScale );
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$plot->SetY_MinorDivisionColor( $colorMap[ "Gray90" ] );
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$plot->DrawY_MinorDivisions();
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//----------------------------------
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// Setup and draw major horizontal scale (right to left).
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//----------------------------------
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// Extend lines 5 pixels past margins for label.
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$plot->SetX_MajorDivisionExtention( 5 );
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// Scale.
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$plot->SetX_MajorDivisionScale( $X_MajorScale );
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// Division lines are blue.
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$plot->SetX_MajorDivisionColor( $colorMap[ "Gray80" ] );
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// Text labels are dark gray.
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$plot->SetX_MajorDivisionTextColor( $colorMap[ "Black" ] );
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$plot->SetX_MajorTextCallback( "textCallback" );
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// Draw it.
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$plot->DrawX_MajorDivisions();
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//----------------------------------
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// Setup and draw major vertical scale (top to bottom)
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//----------------------------------
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// Extend lines 5 pixels past margins for label.
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$plot->SetY_MajorDivisionExtention( 5 );
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// Scale.
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$plot->SetY_MajorDivisionScale( $Y_MajorScale );
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// Divisions in dark gray.
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$plot->SetY_MajorDivisionColor( $colorMap[ "Gray80" ] );
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$plot->SetY_MajorTextCallback( "textCallback" );
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// Lables in dark gray.
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$plot->SetY_MajorDivisionTextColor( $colorMap[ "Black" ] );
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// Draw it.
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$plot->DrawY_MajorDivisions();
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}
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function plotRenderRegression( $regression, $coefficients, $min, $max, $color )
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{
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global $plot;
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global $imageWidth;
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global $leftMargin;
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global $rightMargin;
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$plot->resetData();
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$frameWidth = $imageWidth - $leftMargin - $rightMargin;
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for ( $xIndex = 0; $xIndex < $frameWidth; ++$xIndex )
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{
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$x = $xIndex * ( $max - $min ) / $frameWidth + $min;
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$y = $regression->interpolate( $coefficients, $x );
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$plot->addData( $x, $y );
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}
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$plot->setColor( $color );
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$plot->renderWithLines();
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}
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?>
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