Comments on: GD Library Bar Chart

By: Anthony

Anthony — Thu, 12 Aug 2010 14:03:38 +0000

Do you have a tutorial on how to graph data from a database?

By: Scott Cronk

Scott Cronk — Thu, 09 Apr 2009 04:46:30 +0000

I have data sets with negative values and positive values and your tutorial code only seems to work for positive values.. negatives are drawn below and outside the canvas. I am planning to decipher your code to develop a fix … but perhaps you have a quick and easy fix I could use???

By: Michael Black

Michael Black — Wed, 18 Feb 2009 23:54:12 +0000

Great tutorial, it works wonderfully! Thank you very much!

By: yogendra kaushik

yogendra kaushik — Thu, 15 Jan 2009 06:58:12 +0000

Its Really very Good tutorial, Thanks for such a good resource

By: fg

fg — Fri, 07 Nov 2008 13:01:02 +0000

By: sean

sean — Wed, 12 Dec 2007 21:20:08 +0000

Very good tutorial but i had to remove the following code to display this table correctly: $xPos = $c4['x'] $increment $verticalPadding-($wordWidth/2); ImageString($canvas, 2, $xPos, $c4['y'], $assoc, $black); $increment = $sqW;*/

By: Luca

Luca — Mon, 23 Jul 2007 15:33:19 +0000

Hi there,very good tutorial, thank you for sharing.Though, I have no idea why but I had to correct this line of the code:imagefilledrectangle($canvas, $xPos, $c4['y'], $xPos $barWidth, $yPos, $blue);with this one:imagefilledrectangle($canvas, $xPos, $yPos, $xPos $barWidth, $c4['y'], $blue);in order to make the whole tutorial run.Thanks alot again,Luca

By: kasnap

kasnap — Mon, 25 Jun 2007 04:58:01 +0000

Thanks a lot for this valuable tutorial