68 lines
1.8 KiB
Markdown
68 lines
1.8 KiB
Markdown
# Drawing a plot chart
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[Reference](http://wiki.pchart.net/doc.chart.drawplotchart.html)
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```php
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require '/path/to/your/vendor/autoload.php';
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use CpChart\Data;
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use CpChart\Image;
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/* Create and populate the Data object */
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$data = new Data();
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for ($i = 0; $i <= 20; $i++) {
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$data->addPoints(rand(0, 20), "Probe 1");
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}
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for ($i = 0; $i <= 20; $i++) {
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$data->addPoints(rand(0, 20), "Probe 2");
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}
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$data->setSerieShape("Probe 1", SERIE_SHAPE_FILLEDTRIANGLE);
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$data->setSerieShape("Probe 2", SERIE_SHAPE_FILLEDSQUARE);
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$data->setAxisName(0, "Temperatures");
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/* Create the Image object */
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$image = new Image(700, 230, $data);
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/* Turn off Antialiasing */
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$image->Antialias = false;
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/* Add a border to the picture */
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$image->drawRectangle(0, 0, 699, 229, ["R" => 0, "G" => 0, "B" => 0]);
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/* Write the chart title */
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$image->setFontProperties(["FontName" => "Forgotte.ttf", "FontSize" => 11]);
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$image->drawText(150, 35, "Average temperature", ["FontSize" => 20, "Align" => TEXT_ALIGN_BOTTOMMIDDLE]);
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/* Set the default font */
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$image->setFontProperties(["FontName" => "pf_arma_five.ttf", "FontSize" => 6]);
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/* Define the chart area */
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$image->setGraphArea(60, 40, 650, 200);
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/* Draw the scale */
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$scaleSettings = [
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"XMargin" => 10,
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"YMargin" => 10,
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"Floating" => true,
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"GridR" => 200,
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"GridG" => 200,
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"GridB" => 200,
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"DrawSubTicks" => true,
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"CycleBackground" => true
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];
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$image->drawScale($scaleSettings);
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/* Turn on Antialiasing */
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$image->Antialias = true;
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$image->setShadow(true, ["X" => 1, "Y" => 1, "R" => 0, "G" => 0, "B" => 0, "Alpha" => 10]);
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/* Draw the line chart */
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$image->drawPlotChart();
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/* Write the chart legend */
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$image->drawLegend(580, 20, ["Style" => LEGEND_NOBORDER, "Mode" => LEGEND_HORIZONTAL]);
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/* Render the picture (choose the best way) */
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$image->autoOutput("example.drawPlotChart.simple.png");
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```
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