line.md

Drawing a line chart

Reference

require '/path/to/your/vendor/autoload.php';

use CpChart\Data;
use CpChart\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");