This is a box plot (plot type boxes).
Unlike the previous example (Section 5.50, “Example - Box Plot with Data Reduction”) the data array
is already processed, and includes the 5 values that make up each row for a
box plot (Ymin, YQ1, Ymid, YQ3, Ymax) and some
additional outlier points.
This example also shows how colors and line styles can be applied to a box
plot.
Note: Box plots were added in PHPlot-6.1.0.
Example 5.51. Box Plot with Outliers and Styles
<?php
# PHPlot Example - Box Plot with outliers and line styles
require_once 'phplot.php';
# Data array: each row is (label, X, Ymin, YQ1, Ymid, YQ3, Ymax, [Youtlier...])
$data = array(
array('', 1, 10, 15, 20, 25, 30),
array('', 2, 12, 14, 18, 20, 24, 6, 8, 28),
array('', 3, 5, 11, 19, 28, 35),
array('', 4, 14, 17, 21, 26, 28, 9, 12, 35, 32),
array('', 5, 12, 15, 22, 27, 30),
array('', 6, 15, 18, 20, 22, 26, 12),
array('', 7, 10, 15, 21, 26, 28, 32),
array('', 8, 11, 15, 20, 24, 27, 6, 8),
array('', 9, 10, 15, 19, 22, 26, 4, 34),
);
$plot = new PHPlot(800, 600);
$plot->SetTitle('Box Plot with outliers and styles');
$plot->SetDataType('data-data');
$plot->SetDataValues($data);
$plot->SetPlotType('boxes');
$plot->SetImageBorderType('plain'); // Improves presentation in the manual
# Use dashed lines for the upper and lower whiskers:
$plot->SetLineStyles('dashed');
# Make the box and belt use a thicker line:
$plot->SetLineWidths(array(3, 3, 1));
# Make the outliers red, and everything else blue:
$plot->SetDataColors(array('blue', 'blue', 'red', 'blue'));
# Draw the outliers using a "star":
$plot->SetPointShapes('star');
$plot->DrawGraph();