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msd2/tracking/piwik/vendor/szymach/c-pchart/doc/line.md

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+# Drawing a line chart
+
+[Reference](http://wiki.pchart.net/doc.chart.drawlinechart.html)
+
+```php
+require '/path/to/your/vendor/autoload.php';
+
+use CpChart\Chart\Data;
+use CpChart\Chart\Image;
+
+/* Build a dataset */
+$data = new Data();
+$data->addPoints([-4, VOID, VOID, 12, 8, 3], "Probe 1");
+$data->addPoints([3, 12, 15, 8, 5, -5], "Probe 2");
+$data->addPoints([2, 7, 5, 18, 19, 22], "Probe 3");
+$data->setSerieTicks("Probe 2", 4);
+$data->setSerieWeight("Probe 3", 2);
+$data->setAxisName(0, "Temperatures");
+$data->addPoints(["Jan", "Feb", "Mar", "Apr", "May", "Jun"], "Labels");
+$data->setSerieDescription("Labels", "Months");
+$data->setAbscissa("Labels");
+
+/* Create the 1st chart */
+$image = new Image(700, 230, $data);
+$image->setGraphArea(60, 60, 450, 190);
+$image->drawFilledRectangle(60, 60, 450, 190, [
+    "R" => 255,
+    "G" => 255,
+    "B" => 255,
+    "Surrounding" => -200,
+    "Alpha" => 10
+]);
+$image->drawScale(["DrawSubTicks" => true]);
+$image->setShadow(true, ["X" => 1, "Y" => 1, "R" => 0, "G" => 0, "B" => 0, "Alpha" => 10]);
+$image->setFontProperties(["FontName" => "fonts/pf_arma_five.ttf", "FontSize" => 6]);
+$image->drawLineChart(["DisplayValues" => true, "DisplayColor" => DISPLAY_AUTO]);
+$image->setShadow(false);
+
+/* Create the 2nd chart */
+$image->setGraphArea(500, 60, 670, 190);
+$image->drawFilledRectangle(500, 60, 670, 190, ["R" => 255, "G" => 255, "B" => 255, "Surrounding" => -200, "Alpha" => 10]);
+$image->drawScale(["Pos" => SCALE_POS_TOPBOTTOM, "DrawSubTicks" => true]);
+$image->setShadow(true, ["X" => -1, "Y" => 1, "R" => 0, "G" => 0, "B" => 0, "Alpha" => 10]);
+$image->drawLineChart();
+$image->setShadow(false);
+
+/* Write the legend */
+$image->drawLegend(510, 205, ["Style" => LEGEND_NOBORDER, "Mode" => LEGEND_HORIZONTAL]);
+$image->autoOutput("example.drawLineChart.png");
+```