if you are running Inkscape 0.48 then you will probably also need to update the inx file as well, attached is the latest version from trunk
** Attachment added: "funcplot.inx" https://bugs.launchpad.net/inkscape/+bug/800552/+attachment/2181145/+files/funcplot.inx -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/800552 Title: function plotter in inkscape does not work To manage notifications about this bug go to: https://bugs.launchpad.net/inkscape/+bug/800552/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs