| <![CDATA[<?php
require_once("../lib/phpchartdir.php");
#===================================================================
# For demo purpose, use random numbers as data for the chart
#===================================================================
#Use a random table to create the data. The random table contains 4 cols x 31
#rows, using 9 as seed.
$rantable = new RanTable(9, 4, 31);
#Set the 1st col to be the series 1, 2, 3, ....
$rantable->setCol(0, 1, 1, 1);
#Set the 2nd, 3rd and 4th col to be random number starting from 40, 50 and 60.
#The change between rows is set to -5 to 5. The minimum value of any cell is 0.
$rantable->setCol(1, 40, -5, 5, 0);
$rantable->setCol(2, 50, -5, 5, 0);
$rantable->setCol(3, 60, -5, 5, 0);
#Use the 1st col as the axis label
$labels = $rantable->getCol(0);
#Use the 2nd, 3rd and 4th columns for 3 lines
$data0 = $rantable->getCol(1);
$data1 = $rantable->getCol(2);
$data2 = $rantable->getCol(3);
#Simulate some data points have no data value
for($i = 1; $i < 30; $i += 7) {
$data0[$i] = NoValue;
$data1[$i] = NoValue;
$data2[$i] = NoValue;
}
#===================================================================
# Now we have the data ready. Actually drawing the chart.
#===================================================================
#Create a XYChart object of size 600 x 220 pixels
$c = new XYChart(600, 220);
#Set the plot area at (100, 25) and of size 450 x 150 pixels. Enabled both
#vertical and horizontal grids by setting their colors to light grey (0xc0c0c0)
$plotAreaObj = $c->setPlotArea(100, 25, 450, 150);
$plotAreaObj->setGridColor(0xc0c0c0, 0xc0c0c0);
#Add a legend box (92, 0) (top of plot area) using horizontal layout. Use 8 pts
#Arial font. Disable bounding box (set border to transparent).
$legendObj = $c->addLegend(92, 0, false, "", 8);
$legendObj->setBackground(Transparent);
#Add a title to the y axis. Draw the title upright (font angle = 0)
$titleObj = $c->yAxis->setTitle("Average\nUtilization\n(MBytes)");
$titleObj->setFontAngle(0);
#Use manually scaling of y axis from 0 to 100, with ticks every 10 units
$c->yAxis->setLinearScale(0, 100, 10);
#Set the labels on the x axis
$c->xAxis->setLabels2($labels);
#Set the title on the x axis
$c->xAxis->setTitle("Jun - 2001");
#Add x axis (vertical) zones to indicate Saturdays and Sundays
for($i = 0; $i < 29; $i += 7) {
$c->xAxis->addZone($i, $i + 2, 0xc0c0c0);
}
#Add a line layer to the chart
$layer = $c->addLineLayer();
#Set the default line width to 2 pixels
$layer->setLineWidth(2);
#Add the three data sets to the line layer
$layer->addDataSet($data0, 0xcf4040, "Server #1");
$layer->addDataSet($data1, 0x40cf40, "Server #2");
$layer->addDataSet($data2, 0x4040cf, "Server #3");
#Layout the chart to fix the y axis scaling. We can then use getXCoor and
#getYCoor to determine the position of custom objects.
$c->layout();
#Add the "week n" custom text boxes at the top of the plot area.
for($i = 0; $i < 4; ++$i) {
#Add the "week n" text box using 8 pt Arial font with top center alignment.
$textbox = $c->addText($layer->getXCoor($i * 7 + 2), 25, "Week $i",
"arialbd.ttf", 8, 0x0, TopCenter);
#Set the box width to cover five days
$textbox->setSize($layer->getXCoor($i * 7 + 7) - $layer->getXCoor($i * 7 + 2
) + 1, 0);
#Set box background to pale yellow 0xffff80, with a 1 pixel 3D border
$textbox->setBackground(0xffff80, Transparent, 1);
}
#output the chart
header("Content-type: image/png");
print($c->makeChart2(PNG));
?>]]> |