# Drawing a best fit chart [Reference](http://wiki.pchart.net/doc.chart.drawbestfit.html) ``` php require '/path/to/your/vendor/autoload.php'; use CpChart\Data; use CpChart\Image; /* Create and populate the Data object */ $data = new Data(); for ($i = 0; $i <= 20; $i++) { $data->addPoints(rand(10, 30) + $i, "Probe 1"); } for ($i = 0; $i <= 20; $i++) { $data->addPoints(rand(0, 10) + $i, "Probe 2"); } $data->setAxisName(0, "Temperatures"); /* Create the Image object */ $image = new Image(700, 230, $data); /* Turn off Antialiasing */ $image->Antialias = false; /* Add a border to the picture */ $image->drawRectangle(0, 0, 699, 229, ["R" => 0, "G" => 0, "B" => 0]); /* Write the chart title */ $image->setFontProperties(["FontName" => ".Forgotte.ttf", "FontSize" => 11]); $image->drawText(150, 35, "Average temperature", ["FontSize" => 20, "Align" => TEXT_ALIGN_BOTTOMMIDDLE]); /* Set the default font */ $image->setFontProperties(["FontName" => ".pf_arma_five.ttf", "FontSize" => 6]); /* Define the chart area */ $image->setGraphArea(60, 40, 650, 200); /* Draw the scale */ $scaleSettings = [ "XMargin" => 10, "YMargin" => 10, "Floating" => true, "GridR" => 200, "GridG" => 200, "GridB" => 200, "DrawSubTicks" => true, "CycleBackground" => true ]; $image->drawScale($scaleSettings); /* Turn on Antialiasing */ $image->Antialias = true; /* Draw the line of best fit */ $image->drawBestFit(); /* Turn on shadows */ $image->setShadow(true, ["X" => 1, "Y" => 1, "R" => 0, "G" => 0, "B" => 0, "Alpha" => 10]); /* Draw the line chart */ $image->drawPlotChart(); /* Write the chart legend */ $image->drawLegend(580, 20, ["Style" => LEGEND_NOBORDER, "Mode" => LEGEND_HORIZONTAL]); /* Render the picture (choose the best way) */ $image->autoOutput("example.drawBestFit.png"); ```