This example shows a linepoints plot with data value labels. These are text strings which show the Y value above each point. (This feature was implemented for lines, points, and linepoints plots in PHPlot-5.3.0.) Because the Y values are shown with the data value labels, we have chosen to turn off the Y axis ticks and tick labels, which would be somewhat redundant. This example also has data label lines (see SetDrawXDataLabelLines), which are the lines drawn from the X axis up to the data points, to help associate the point with the X axis label.
Example 5.33. Linepoints Plot with Data Value Labels
<?php
# PHPlot Example: Linepoints plot with Data Value Labels
require_once 'phplot.php';
$data = array(
array('1995', 135),
array('1996', ''), // Missing data point
array('1997', ''),
array('1998', ''),
array('1999', ''),
array('2000', 225),
array('2001', ''),
array('2002', ''),
array('2003', 456),
array('2004', 420),
array('2005', 373),
array('2006', 300),
array('2007', 255),
array('2008', 283),
);
$plot = new PHPlot(800, 600);
$plot->SetImageBorderType('plain'); // Improves presentation in the manual
$plot->SetPlotType('linepoints');
$plot->SetDataType('text-data');
$plot->SetDataValues($data);
$plot->SetTitle("US Federal Emergency Food Assistance, 1995 - 2008\n"
. "(in $ millions)");
# Turn on Y data labels:
$plot->SetYDataLabelPos('plotin');
# Turn on X data label lines (drawn from X axis up to data point):
$plot->SetDrawXDataLabelLines(True);
# With Y data labels, we don't need Y ticks, Y tick labels, or grid lines.
$plot->SetYTickLabelPos('none');
$plot->SetYTickPos('none');
$plot->SetDrawYGrid(False);
# X tick marks are meaningless with this data:
$plot->SetXTickPos('none');
$plot->SetXTickLabelPos('none');
$plot->DrawGraph();