[PHP] PHP Graphing Libraries...?
Hi All, I'm currently looking for a quality (preferably open source) PHP graphing library that will allow me to create various graphs and plot points. I've seen several that do some amazing things, but cost a fortune -- others are either limited, lack documentation, or don't allow plotting of points for multiple entities within the same graph. Can anyone make any quality suggestions? Best, Michael -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] PHP Graphing Libraries...?
On Jun 4, 2009, at 4:35 PM, Gary Smith wrote: JpGraph? Gary Thanks Gary. I've actually been looking at both "JpGraph" (http://www.aditus.nu/jpgraph/ ) and "XML/SWF Charts" (http://www.maani.us/xml_charts/index.php). However, JpGraphs is one of those that suffers from horrendous documentation, and neither seems to allow X-independent graphing for multiple entities on the same graph. For instance, I can't give one entity its own array of "x,y" coordinates and provide another entity with an entirely different set of "x,y" coordinates. I must create a new graph for each and every entity. My current task is an electrical one. I'm writing an app to plot KWH values at specific increments. However, the increments are unique to each particular event. I can't make my X-axis uniform because not every event records data at every second. And I, of course, can't haphazardly insert 0 values to accommodate spacing as that falsifies the data. So I need to be able to plot (KWH, TIME) for multiple entities on the same graph. However, as I said, neither of those packages seem to accommodate this in a straightforward manner. Thoughts? Thanks, Michael -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] PHP Graphing Libraries...?
On Jun 5, 2009, at 5:26 AM, Richard Heyes wrote: ... I would have to suggest RGraph... ( http://www.rgraph.net ) :-) It's uses canvas though, so browser support is limited at the moment though to Firefox 3.5, Safari 4 and Chrome 2. I've looked at the docs and I don't see how exactly it handles "x,y" plotting. I need the ability to plot multiple lines (which it obviously does) with wildly varying "x,y" values. It seems that all of these libraries "cheat" and force common "x" values via the labels. I need something like the following (all in the same chart): $line_one_data = [x,y,x,y,x,y,x,y,x,y,x,y,x,y,x,y,x,y,x,y,x,y,x,y] $line_two_data = [x,y,x,y,x,y,x,y] $line_three_data = [x,y,x,y,x,y,x,y,x,y,x,y,x,y] $graph->plot($line_one_data,$line_two_data,$line_three_data) As I said, each "line" has its own set of "x,y", and although they're all obviously numbers, they don't all have "y" results at the same "x intervals" so I need to be able to control them independently. Surely there's something that can accommodate this...? Best, Michael
Re: [PHP] PHP Graphing Libraries...?
On Jun 5, 2009, at 9:41 AM, Michael A. Peters wrote: Sure - the gd library. Scale the x/y position according to your needs. Well, I was trying to avoid building from scratch, but you may be right. I'm surprised no one else has need for an intuitive setup of this nature. Thanks, Michael
Re: [PHP] PHP Graphing Libraries...?
On Jun 7, 2009, at 5:37 AM, Richard Heyes wrote: Hi, Can I still link the scatter points with lines for readability? I'm not sure why an API would require a "y" for every "x". I've rarely worked with data sets that follow an exact set of X coords. Then where would the point go if you had no y value? -- Richard Heyes It should simply plot the points (and connecting lines) independently. It should also consider the min/max values of all data sets and create those automatically if you don't set the min/max manually. I wasn't saying that I lacked X values -- rather, I don't have a Y for every X of every other item. For instance, say I logged information at 10 o'clock AM for some events, while I didn't log until 10:30 for other events. I don't want to be forced to place something in 10:00 AM just to make the event spacing work. Perhaps I'm simply asking the wrong question. I find that's often the case with me. Creating it with GD would be simple enough, as the idea isn't rocket science. I simply lack time after my current phase to do so, which is why I was hoping something intuitive existed so I could jump right to it. To restate, the following does *NOT* apply to any data I have: X-TIMES(8, 9, 10, 11) DATA-Y1(200,100,400,600) DATA-Y2(40,23,12,84) ...as DATA-Y2 didn't log data at 8 and 10, but rather at 8:30 and 10:30. Therefore, while I certainly can use an X axis labeled from 8 am to 11 am, I need different X values for some DATA sets. I need to be able to plot completely independent X,Y values -- and still connect them with lines to see trends. Reasonable, no? Michael -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
