带基准线的折线图php代码

line($image, $left, $top , $left, $height-$buttom, $black);
//画箭头
imageline($image,$width-$right, $height-$buttom, ($width-$right)-8,$height-$buttom-3, $black);
foreach($data as $k=>$v){ //获取$data中最大值
if( $k== 0 && $v !='' ){
$min = $v;
$max = $v;
}elseif( $v !='' ) {
imagefilledarc($image, $x[$i], $y[$i], 5, 5, 0, 360, $red, IMG_ARC_PIE);//画点
}
else{
imagefilledarc($image, $x[$i], $y[$i], 5, 5, 0, 360, $blue, IMG_ARC_PIE);//画点
for ($i=0;$i<count($data);$i++){
if ($i+1!=count($data)){
imageline($image, $x[$i], $y[$i], $x[$i+1], $y[$i+1], $blue); //画线条
if ($data[$i]>$up||$data[$i]<$down){
$white = imagecolorallocate($image, 255, 255, 255); //定义真彩画布及颜色值//
$black = imagecolorallocate($image, 10, 10, 10);
$blue = imagecolorallocate($image, 0, 0, 255);
}
}
//画上基准线的值
$upl=$top+round($height-$top-$buttom)*(1-$up/$max);
imageline($image, $left,$upl, $width-$right, $upl, $yellow );
imagestring($image, 5, $width-$right-57,$upl+2, "UCL="."$up", $yellow );
}
else{
imagefilledarc($image, $x[count($data)-1],$y[count($data)-1], 5, 5, 0, 360, $blue,IMG_ARC_PIE);//画点
}
}
//绘制折点标签值
for ($i=0;$i<count($data);$i++){
* Date: 733687e21aaa3.html:我做了点修改（2013-4-14）
*/
header("Content-Type:image/png");
$width = 900; //定义画布宽度
imagestring($image, 10, $left/4, $top+($height-$top-$buttom)*$i/count($data), round($max*(count($data)-$i)/(count($data))), $black);
}
//绘制数据折线图
$red = imagecolorallocate($image, 255, 0, 0); //---------------------//
$yellow = imagecolorallocate($image, 255, 170, 0);
$green= imagecolorallocate($image, 79, 144, 30);
imagestring($image, 5, $width-$right-57,$targetl+2, "tar="."$target", $green);
//输出图形
imagepng($image);
//销毁图形资源
imagedestroy($image);
$x[$i] = $left+$i*$unit;
$y[$i] = $top+round($height-$top-$buttom)*(1-$data[$i]/$max);
}
//画出横坐标
for ($i = 0;$i<count($data);$i++){
//画标准线的值
$targetl=$top+round($height-$top-$buttom)*(1-$target/$max);
imageline($image, $left,$targetl, $width-$right, $targetl, $green );
imageline($image, $left, $top, $left+3, $top+5, $black);
//计算$data数组中每个元素的坐标
$unit =($width-$left-$right)/count($data); //定义x轴刻度间隔
for ($i = 0;$i < count($data);$i++){
$up=79; //上基准线的值
$down=33; //下基准线的值
$target=46; //标准线的值
$x = array(); //定义x坐标空数组
imagefill($image, 0, 0, $white); //用白色填充画布
//画横坐标
imageline($image, $left,$height-$buttom, $width-$right, $height-$buttom, $black);
$y = array(); //定义y坐标空数组
$data = array(10,5,30,40,25,80,5,30,40,25,46); //定义所绘制数据数组
$name = array('a','b','c','d','e','f','b','c','d','e','f'); //定义横坐标的坐标标签
imageline($image, $left+$i*$unit, $height-$buttom, $left+$i*$unit, $height-$buttom-8, $black);
imagestring($image, 10, $left+$i*$unit, $height-$buttom, $name[$i], $black);
imageline($image,$width-$right, $height-$buttom, ($width-$right)-8,$height-$buttom+3, $black);
imageline($image, $left-3, $top+5, $left, $top, $black);
//画下基准线的值
$downl=$top+round($height-$top-$buttom)*(1-$down/$max);
imageline($image, $left,$downl, $width-$right, $downl,$yellow );
imagestring($image, 5, $width-$right-57,$downl+2, "LCL="."$down", $yellow );
if ($data[$i]>$up||$data[$i]<$down){
imagestring($image, 10, $x[$i]+5, $y[$i]+5, $data[$i], $red);
}
else{
imagestring($image, 10, $x[$i]+5, $y[$i]+5, $data[$i], $blue);
/**
* VoteSystem Version1.0
* ================================================
* Copy 2012
* ================================================
* Author: Lpyuan
$min = min($min,$v);
$max = max($max,$v);
}
if($v == ''){
$kong = $k;
}
}
$image = imagecreatetruecolor($width, $height); //---------------------//
$height= 240; //定义画布高度
$right = 20; //定义坐标系距画布右侧距离
$left = 20; //定义坐标系距画布左侧距离
$top = 70; //定义坐标系距画布上侧距离
$buttom= 20; //定义坐标系距画布下侧距离
}
//画出纵坐标
for($i = 0;$i<count($data);$i++){