Looking for a graphing package for PHP

[ChrisFL]

I'm looking for a graphing package for PHP that will let me plot several different lines (line graph) from a CSV, but that will give me multiple scaling on the Y axis... for example, like this:

http://www.lowcostcpe.com/tempfolder/ecu/77777777777.gif

I'm looking to imitate that graph via PHP. Notice how the graph consists of several lines each with their own scale on the Y axis. I've found a bunch of packages that will graph via PHP, but I can't find one that will do the scaling like this. Anyone know of such a package?

I believe this is the right place to ask, I apologize if it's not. TIA.

--Chris

[yid]

JPGraph http://www.aditus.nu/jpgraph/ supports two Y Scales (right and left), but if you wanted to get creative with it there are a couple of other options.

A few options that come to mind:

• You can use right and left scales, and then turn one of the plots negative to offer a third (or fourth) scale.

• You can color the area of one of your plots based on the value of the third dataset.

• If you're tied to this graph layout, you can determine the ratio of the first plot to the second and third, and figure up the left side scales yourself. It may take some code/math to figure up the ratios and the appropriate scale values, but once you have that, you can create the scales with GD, and, using that image as a background, just add the graph with any plotting library.

HTH
yid