phplot 多色显示数据
【摘要】
<?php
# PHPlot Example: Bar chart with bar color depending on value
require_once 'phplot.php';
# Callback for picking a data color.
# PHPlot will call this ever...
<?php # PHPlot Example: Bar chart with bar color depending on value require_once 'phplot.php'; # Callback for picking a data color. # PHPlot will call this every time it needs a data color. # This returns a color index which depends on the data value. # Color 0 is for values >= 80%, 1 is for >= 60%, 2 is for < 60%. # The data_array must have 'text-data' type. function pickcolor($img, $data_array, $row, $col) { $d = $data_array[$row][$col+1]; // col+1 skips over the row's label if ($d >= 80) return 0; if ($d >= 60) return 1; return 2; } # The data array has our monthly performance as a percentage. $data = array( array('Jan', 95), array('Feb', 75), array('Mar', 83), array('Apr', 66), array('May', 90), array('Jun', 80), array('Jul', 70), array('Aug', 50), array('Sep', 60), array('Oct', 70), array('Nov', 80), array('Dec', 45), ); $plot = new PHPlot(800, 600); $plot->SetImageBorderType('plain'); // Improves presentation in the manual $plot->SetPlotType('bars'); $plot->SetDataValues($data); $plot->SetDataType('text-data'); $plot->SetTitle('Monthly Performance Rating'); # Turn off X Tick labels which have no meaning here. $plot->SetXTickPos('none'); # Force the Y axis to be exactly 0:100 $plot->SetPlotAreaWorld(NULL, 0, NULL, 100); # Establish the function 'pickcolor' as a data color selection callback. # Set the $data array as the pass-through argument, so the function has # access to the data values without relying on global variables. $plot->SetCallback('data_color', 'pickcolor', $data); # The three colors are meaningful to the data color callback. $plot->SetDataColors(array('green', 'yellow', 'red')); # The legend will explain the use of the 3 colors. $plot->SetLegend(array('Exceeded expectations', 'Met expectations', 'Failed to meet expectations')); $plot->DrawGraph();
文章来源: blog.csdn.net,作者:fengda2870,版权归原作者所有,如需转载,请联系作者。
原文链接:blog.csdn.net/fengda2870/article/details/7045457
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