note 58579 modified in function.imagecreate by nlopess
| From: | nlopess@php.net | Date: | Mon, 30 Jan 2006 17:23:21 +0000 |
| Subject: | note 58579 modified in function.imagecreate by nlopess | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-102734@lists.php.net to get a copy of this message | ||
// A simple XY graph
<html>
<head>
<title>XY Graph</title>
<h2>Practice XY Graph</h2>
</head>
<body>
<?php
$left = 0;
$top = 0;
$x_size = 400;
$y_size = 400;
$char_width = 8;
$char_height = 11;
$x_start = $x_left + 100;
$y_start = $top + $char_height * 1.5;
$x_end = $x_start + $x_size;
$y_end = $y_start + $y_size;
$right = $x_start + $x_size + 40;
$bottom = $y_start + $y_size + $char_height * 1.5;
$graph_n = 100;
for($i = 0; $i < $graph_n; $i++ )
{
$graph_x[$i] = $i;
$graph_y[$i] = $i * $i;
}
$min_x = 9e99;
$min_y = 9e99;
$max_x = -9e99;
$max_y = -9e99;
$avg_y = 0.0;
for($i = 0; $i < $graph_n; $i++ )
{
if( $graph_x[$i] < $min_x )
$min_x = $graph_x[$i];
if( $graph_x[$i] > $max_x )
$max_x = $graph_x[$i];
if( $graph_y[$i] < $min_y )
$min_y = $graph_y[$i];
if( $graph_y[$i] > $max_y )
$max_y = $graph_y[$i];
$avg_y += $graph_y[$i];
}
$avg_y = $avg_y / $graph_n;
$min_x = 0;
$min_y = 0;
$max_x += $max_x * 0.05;
$max_y += $max_y * 0.05;
$image = ImageCreate($right - $left, $bottom - $top);
$background_color = imagecolorallocate($image, 255, 255, 255);
$text_color = imagecolorallocate($image, 233, 14, 91);
$grey = ImageColorAllocate($image, 204, 204, 204);
$white = imagecolorallocate($image, 255, 255, 255);
$black = imagecolorallocate($image, 0, 0, 0);
$red = imagecolorallocate($image, 255, 0, 0);
imagerectangle($image, $left, $top, $right - 1, $bottom - 1, $black );
imagerectangle($image, $x_start, $y_start, $x_end, $y_end, $grey );
for($i = 0; $i < $graph_n; $i++ )
{
$pt_x = $x_start + ($x_end-$x_start)*($graph_x[$i]-$min_x)/($max_x-$min_x);
$pt_y = $y_end - ($y_end - $y_start)*($graph_y[$i]-$min_y)/($max_y-$min_y);
// imagesetpixel( $image, $pt_x, $pt_y, $black );
imagechar($image, 2, $pt_x - 3, $pt_y - 10, '.', $black);
}
$string = sprintf("%2.5f", $max_y);
imagestring($image, 4, $x_start - strlen($string) * $char_width, $y_start - $char_width, $string,
$black);
$string = sprintf("%2.5f", $min_y);
imagestring($image, 4, $x_start - strlen($string) * $char_width, $y_end - $char_height, $string,
$black);
$string = sprintf("%2.5f", $min_x);
imagestring($image, 4, $x_start - (strlen($string) * $char_width)/2, $y_end, $string, $black);
$string = sprintf("%2.5f", $max_x);
imagestring($image, 4, $x_end - (strlen($string) * $char_width) / 2, $y_end, $string, $black);
$x_title = 'x axis';
$y_title = 'y axis';
imagestring($image, 4, $x_start + ($x_end - $x_start) / 2 - strlen($x_title) * $char_width / 2,
$y_end, $x_title, $black);
imagestring($image, 4, $char_width, ($y_end - $y_start) / 2, $y_title, $black);
header('Content-type: image/png');
$filename = sprintf("%d.png", time());
ImagePNG($image,$filename);
ImageDestroy($image);
printf("<img src='%s'> ", $filename);
?>
</body>
</html>
--was--
// A simple XY graph
<html>
<head>
<title>XY Graph</title>
<h2>Practice XY Graph</h2>
</head>
<body>
<?php
$left = 0;
$top = 0;
$x_size = 400;
$y_size = 400;
$char_width = 8;
$char_height = 11;
$x_start = $x_left + 100;
$y_start = $top + $char_height * 1.5;
$x_end = $x_start + $x_size;
$y_end = $y_start + $y_size;
$right = $x_start + $x_size + 40;
$bottom = $y_start + $y_size + $char_height * 1.5;
$graph_n = 100;
for($i = 0; $i < $graph_n; $i++ )
{
$graph_x[$i] = $i;
$graph_y[$i] = $i * $i;
}
$min_x = 9e99;
$min_y = 9e99;
$max_x = -9e99;
$max_y = -9e99;
$avg_y = 0.0;
for($i = 0; $i < $graph_n; $i++ )
{
if( $graph_x[$i] < $min_x )
$min_x = $graph_x[i];
if( $graph_x[$i] > $max_x )
$max_x = $graph_x[$i];
if( $graph_y[$i] < $min_y )
$min_y = $graph_y[$i];
if( $graph_y[$i] > $max_y )
$max_y = $graph_y[$i];
$avg_y += $graph_y[$i];
}
$avg_y = $avg_y / $graph_n;
$min_x = 0;
$min_y = 0;
$max_x += $max_x * 0.05;
$max_y += $max_y * 0.05;
$image = ImageCreate($right - $left, $bottom - $top);
$background_color = imagecolorallocate($image, 255, 255, 255);
$text_color = imagecolorallocate($image, 233, 14, 91);
$grey = ImageColorAllocate($image, 204, 204, 204);
$white = imagecolorallocate($image, 255, 255, 255);
$black = imagecolorallocate($image, 0, 0, 0);
$red = imagecolorallocate($image, 255, 0, 0);
imagerectangle($image, $left, $top, $right - 1, $bottom - 1, $black );
imagerectangle($image, $x_start, $y_start, $x_end, $y_end, $grey );
for($i = 0; $i < $graph_n; $i++ )
{
$pt_x = $x_start + ($x_end-$x_start)*($graph_x[$i]-$min_x)/($max_x-$min_x);
$pt_y = $y_end - ($y_end - $y_start)*($graph_y[$i]-$min_y)/($max_y-$min_y);
// imagesetpixel( $image, $pt_x, $pt_y, $black );
imagechar($image, 2, $pt_x - 3, $pt_y - 10, '.', $black);
}
$string = sprintf("%2.5f", $max_y);
imagestring($image, 4, $x_start - strlen($string) * $char_width, $y_start - $char_width, $string,
$black);
$string = sprintf("%2.5f", $min_y);
imagestring($image, 4, $x_start - strlen($string) * $char_width, $y_end - $char_height, $string,
$black);
$string = sprintf("%2.5f", $min_x);
imagestring($image, 4, $x_start - (strlen($string) * $char_width)/2, $y_end, $string, $black);
$string = sprintf("%2.5f", $max_x);
imagestring($image, 4, $x_end - (strlen($string) * $char_width) / 2, $y_end, $string, $black);
$x_title = 'x axis';
$y_title = 'y axis';
imagestring($image, 4, $x_start + ($x_end - $x_start) / 2 - strlen($x_title) * $char_width / 2,
$y_end, $x_title, $black);
imagestring($image, 4, $char_width, ($y_end - $y_start) / 2, $y_title, $black);
header('Content-type: image/png');
$filename = sprintf("%d.png", time());
ImagePNG($image,$filename);
ImageDestroy($image);
printf("<img src='%s'> ", $filename);
?>
</body>
</html>
http://php.net/manual/en/function.imagecreate.php