PHPlot曲线图

";
while($row = mysql_fetch_array($result))
  {
    if ($row['ch2'] > -100 and $row['ch2'] < 100)
	$data[] = array('',strtotime($row['date']),$row['ch2'],$row['ch2']-2);
	/*
	echo "";
    echo "" . $row['date'] . "";
    echo "" . $row['ch1'] . "";
    echo ""; */
  }
//echo "";

//echo count($data);


$plot = new PHPlot(800, 600);
$plot->SetTitle('df');
$plot->SetXLabelType('time', '%Y-%m-%d');
$plot->SetDataValues($data);
$plot->SetDataValues($data2);
$plot->SetDataType('data-data');
$plot->SetPlotType('lines');
$plot->SetXTitle('Date(Y-m-d)');
$plot->SetYTitle('Temprature');
//$plot->SetLegend(array('2Y', 'Y^2'));
$plot->DrawGraph();