Graphs

[luceroel]

Hi! I want to graph some data from a BD. I have a code but doesn't function. When I call the page, only appears a x. Couldo u check my code???? this code only generate a rectangle with a title, but I can't see it. Thanks!!!

header ("Content-type: image/png"); 
$width = 480; 
$height = 250; 
$im = imagecreate($width, $height); 
$white = imagecolorallocate ($im,255,255,255); 
$blue = imagecolorallocate ($im,0,0,255); 
$black = imagecolorallocate ($im, 0, 0, 0); 
$red = imagecolorallocate ($im, 255, 0, 0); 

$link = mysql_connect("localhost","root",""); 
mysql_select_db("sorteo", $link); 
$res=mysql_query("SELECT COUNT(sexo) FROM registros WHERE sexo='1'", $link);  

$row=@mysql_fetch_array($res); 
//echo $row[0]; 
$m=$row[0];   //Cuantas mujeres 
$res1=mysql_query("SELECT COUNT(sexo) FROM registros WHERE sexo='2'", $link);  

$row1=@mysql_fetch_array($res1); 
//echo $row1[0]; 
$h=$row1[0];  //Cuantos hombres 
$numrow=$m+$h; //Llamadas totales 
//echo $numrow; 

$nval = 2; 
$maxval = $numrow;  

$vmargin = 20;  //Arriba (margen vertical) para el titulo lado x 
$hmargin = 38;  // izq (margen horizontal) para los datos lado y 
$base = floor (($width - $hmargin) / $nval);  //distancia entre columnas 
$ysize = $height - 2 * $vmargin;  //tamaño de y 
$xsize = $nval * $base;  //tamaño de x 

imagerectangle ($im, $hmargin, $vmargin, $hmargin + $xsize, $vmargin + $ysize, $black);  //tamaño del recuadro 

$titlefont = 3; 
$title = "Por Sexo"; 
$txtsz = imagefontwidth($titlefont) * strlen($title); 
$xpos = (int)($hmargin + ($xsize - $txtsz)/2);  //centrar el titulo 
$xpos = max(1, $xpos);  //coordenadas positivas 
$ypos = 3;  //margen de arriba 
imagestring ($im, $titlefont, $xpos, $ypos, $title, $black); 


imagepng($im); 
imagedestroy($im);

[Weedpacket]

Two suggestions to help you work this out for yourself:
1) Ask for the properties of the broken image.

2) Leave out the image/png header (or replace it with text/plain) temporarily, and have a look at what is being sent to the browser.

[luceroel]

Hi! I did it and I can see the rectangle but incomplete and the title. What do I do??? and Thanks for the help!!

[luceroel]

Hi! Now it's fuction. Only I have a question I need to put Y labels and a Grid. I did a routine but didn't function. Could u help me??? Please.
My routine:

$vmargin = 20;  //vertical margin
$hmargin = 5;  // left horizontal margin
$base = floor (($width - $hmargin) / $nval);  //distance between columns 
$ysize = $height - 2 * $vmargin;  //y-size of plot
$xsize = $nval * $base;  //x-size of plot

//y labels and grid lines
$labelfont = 3;
$ngrid = 5;  //# of grid lines

$dydat = 5;  //data units between grid
$dypix = $ysize / ($ngrid + 1);  //pixeles between grid lines

for ($i = 0; $i >= ($ngrid + 1); $i++)
    {
     $ydat = (int)($i * $dydat);  //height of grid line in units of data
     $ypos = $vmargin + $ysize - (int)($i * $dypix);  //height of grid line in pixels
     $txtsz = imagefontwidth ($labelfont) * strlen ($ydat);  //pixel-width of label
     $txtht = imagefontheight($labelfont);  //pixel-height of label
     $xpos = (int)(($hmargin - $txtsz) / 2);
     $xpos = max(1, $xpos);

 imagestring ($im, $labelfont, $xpos, $ypos - (int)($txtht / 2), $ydat, $black);

 if (!($i == 0) && !($i > $ngrid))
    {
     imageline ($im, $hmargin - 3, $ypos, $hmargin + $xsize, $ypos, $gray);
   //don't draw at y=0 and top
    }
} 

thanks! 😃 😕

[luceroel]

Please Help me!!!😕