1# Drawing a scatter threshold chart 2 3[Reference](http://wiki.pchart.net/doc.scatter.drawscatterthreshold.html) 4 5```php 6require '/path/to/your/vendor/autoload.php'; 7 8use CpChart\Chart\Scatter; 9use CpChart\Data; 10use CpChart\Image; 11 12/* Create the Data object */ 13$data = new Data(); 14 15/* Create the X axis and the binded series */ 16$data->createFunctionSerie("X", "1/z", ["MinX" => -10, "MaxX" => 10, "XStep" => 1]); 17$data->setAxisName(0, "x = 1/z"); 18$data->setAxisXY(0, AXIS_X); 19$data->setAxisPosition(0, AXIS_POSITION_BOTTOM); 20 21/* Create the Y axis */ 22$data->createFunctionSerie("Y", "z", ["MinX" => -10, "MaxX" => 10, "XStep" => 1]); 23$data->setSerieOnAxis("Y", 1); 24$data->setAxisName(1, "y = z"); 25$data->setAxisXY(1, AXIS_Y); 26$data->setAxisPosition(1, AXIS_POSITION_RIGHT); 27 28/* Create the Y axis */ 29$data->createFunctionSerie("Y2", "z*z*z", ["MinX" => -10, "MaxX" => 10, "XStep" => 1]); 30$data->setSerieOnAxis("Y2", 2); 31$data->setAxisName(2, "y = z*z*z"); 32$data->setAxisXY(2, AXIS_Y); 33$data->setAxisPosition(2, AXIS_POSITION_LEFT); 34 35/* Create the 1st scatter chart binding */ 36$data->setScatterSerie("X", "Y", 0); 37$data->setScatterSerieDescription(0, "Pass A"); 38$data->setScatterSerieTicks(0, 4); 39$data->setScatterSerieColor(0, ["R" => 0, "G" => 0, "B" => 0]); 40 41/* Create the 2nd scatter chart binding */ 42$data->setScatterSerie("X", "Y2", 1); 43$data->setScatterSerieDescription(1, "Pass B"); 44$data->setScatterSerieTicks(1, 4); 45$data->setScatterSerieColor(1, ["R" => 120, "G" => 0, "B" => 255]); 46 47/* Create the Image object */ 48$image = new Image(400, 400, $data); 49 50/* Draw the background */ 51$settings = ["R" => 170, "G" => 183, "B" => 87, "Dash" => 1, "DashR" => 190, "DashG" => 203, "DashB" => 107]; 52$image->drawFilledRectangle(0, 0, 400, 400, $settings); 53 54/* Overlay with a gradient */ 55$image->drawGradientArea(0, 0, 400, 400, DIRECTION_VERTICAL, [ 56 "StartR" => 219, 57 "StartG" => 231, 58 "StartB" => 139, 59 "EndR" => 1, 60 "EndG" => 138, 61 "EndB" => 68, 62 "Alpha" => 50 63]); 64$image->drawGradientArea(0, 0, 400, 20, DIRECTION_VERTICAL, [ 65 "StartR" => 0, 66 "StartG" => 0, 67 "StartB" => 0, 68 "EndR" => 50, 69 "EndG" => 50, 70 "EndB" => 50, 71 "Alpha" => 80 72]); 73 74/* Write the picture title */ 75$image->setFontProperties(["FontName" => "Silkscreen.ttf", "FontSize" => 6]); 76$image->drawText(10, 13, "createFunctionSerie() - Functions computing", [ 77 "R" => 255, 78 "G" => 255, 79 "B" => 255 80]); 81 82/* Add a border to the picture */ 83$image->drawRectangle(0, 0, 399, 399, ["R" => 0, "G" => 0, "B" => 0]); 84 85/* Set the default font */ 86$image->setFontProperties(["FontName" => "pf_arma_five.ttf", "FontSize" => 6]); 87 88/* Set the graph area */ 89$image->setGraphArea(50, 50, 350, 350); 90 91/* Create the Scatter chart object */ 92$myScatter = new Scatter($image, $data); 93 94/* Draw the scale */ 95$myScatter->drawScatterScale(["XMargin" => 10, "YMargin" => 10, "Floating" => true]); 96 97/* Turn on shadow computing */ 98$image->setShadow(true, ["X" => 1, "Y" => 1, "R" => 0, "G" => 0, "B" => 0, "Alpha" => 10]); 99 100/* Draw the 0/0 lines */ 101$myScatter->drawScatterThreshold(0, ["AxisID" => 0, "R" => 0, "G" => 0, "B" => 0, "Ticks" => 10]); 102$myScatter->drawScatterThreshold(0, ["AxisID" => 1, "R" => 0, "G" => 0, "B" => 0, "Ticks" => 10]); 103 104/* Draw a treshold area */ 105$myScatter->drawScatterThresholdArea(-0.1, 0.1, ["AreaName" => "Error zone"]); 106 107/* Draw a scatter plot chart */ 108$myScatter->drawScatterLineChart(); 109$myScatter->drawScatterPlotChart(); 110 111/* Draw the legend */ 112$myScatter->drawScatterLegend(300, 380, ["Mode" => LEGEND_HORIZONTAL, "Style" => LEGEND_NOBORDER]); 113 114/* Render the picture (choose the best way) */ 115$image->autoOutput("example.createFunctionSerie.scatter.png"); 116``` 117
