Extension talk:PChart4mw

Welcome to the talk-page of pchart4mw. Discussions can be done on this page.

Integration with Semantic MediaWiki (SMW)
Hi Thank you for this extension, really nice. I want to ask if there's a plan of integrating this to SMW? This is way better than the Semantic result format graph format (google)  printer

Gérard 18:58, 2 December 2009 (UTC) We're glad to hear from you and that you're pleased with the extension. We have no plans in that direction, at least not yet.


 * I'd also appreciate efforts towards integration with SMW!! - Bernhard

We have released a new version of pchart4mw (version 1.1.0 on June 11th 2010). This version of pchart4mw can now be used as parser function. This enables integrating pchart4mw's charting capabilities with other extensions like Semantic MediaWiki (SMW).

Now we have a question (request) to you. Could you share your experience integrating pchart4mw with SMW? Both here and if possible with the SMW community to direct others to these new possibilities? Gérard 08:10, 11 June 2010 (UTC)
 * This is an awesome release, I haven't tried it yet but I was using Pchart4mw w/SMW since its first release by setting the query result to a variable:

 ,, savings: , 

Now this will be more easier and more better.

cheers Msevero

Thank you for your response, please let us know if this new version works as expected with SMW. If your site is a public site we'd appreciate a link as well. Gérard 05:12, 13 June 2010 (UTC)

Large Dataset Line Graphs
Nice extension, thanks for adding it. Using the pChart classes gives much more swishy renders than using GnuPlot. There is one problem I have not been able to solve for my planned implementation though. When trying to create a line graph with a large amount of data, e.g.:

the x-axis labels become overlaid ontop of each other until all you get is a grey line - i.e. there is no setting to say "show 5 x labels", giving me just "0, 100, 200, 300, 400, 500", on the x-axis. The extension seems to be hardwired to show every x-label as it has been entered in to the data.

This is a bit of a show-stopper for me as I need to plot 500+ point datasets as line graphs with useable x-axis ticks. At the moment I am going to have to stick with GnuplotBasic as it has the configuration to do that. Have I missed some obvious control parameter or is this not yet possible with PC4MW? MLCT 15:36, 6 June 2010 (UTC)

Hello, We will look in to this, don't know if the pChart library supports this option. Gérard 03:58, 8 June 2010 (UTC)

I just looked in to it again, initially I thought it wasn't possible, but it seems it is possible after all. I'll register a feature request (see pchart4mw's google code site under issues) for an added parameter skiplabel=x where x is the number of labels to skip. See: http://code.google.com/p/pchart4mw/issues/list After registration I'll ask the developer to develop this new feature. (a little more patience asked from you) Gérard 14:04, 2 July 2010 (UTC)

Decimals ignored in axis labels
Hi, I'm having a problem where the labels for the y-axis are not showing up properly when I use floating point values.

 0.1 0.2 0.3 0.4 0.5 

With the specified code above, the labels for the y-axis come out like this: http://img15.imageshack.us/f/33312048.png/

Scalable for very large wikis?
This extension can use a web service as an external resource for charting. Does it make this extension scalable for very large wikis?--almaghi 17:36, 1 July 2010 (UTC)

Yes it does. This configuration option is available for situations where many charts change often. These situations can consume a lot of processing power from the server in creating chart images.

Creating chart images is a CPU intensive process. Depending on the charting intensity on the wiki a site might require more powerful server processing capacity. pchart4mw's web service option is specifically created to enable separating the processing for creating chart images from processing for the main wiki site.

However, any site with moderate changes of its charts should have no problem and should run perfectly well without a pchart4mw web service configuration. Make sure you really need this.

If you decide using pchart4mw's web service configuration option you might be the first user using this. We would appreciate if you'd share your experience and how to's. You could create a sub-page of this talk page for it. Gérard 05:24, 2 July 2010 (UTC)