To plot m1 vs power, but only for points where speed equals the value c, use python's logical indexing.
For x enter power[speed==c] and for y use m1[speed==c] You can either use the specific numerical value where I wrote "c" above, or define your own constant "c" with the value you want. Steve > On Apr 3, 2016, at 6:17 PM, Jan Gatowski <surface...@gmail.com> wrote: > > I am a new user of veusz and have been unable to find any basic info on > using data filters via a web search. > > As an example, I have a set of comma separated data from a test. The data > include speed, power, and other measurements (m_1...m_N). If I add xy data > to a graph, plotting m_1 against power, I get all the test points. > However, I would like to create several xy lines on the graph, each > corresponding to a single speed. > > I have tried numerous ways to do this with the filter tool without > success. Any help or a link to additional information would be welcome. > > Thanks. > > Jan > > > _______________________________________________ > Veusz-discuss mailing list > Veusz-discuss@gna.org > https://mail.gna.org/listinfo/veusz-discuss _______________________________________________ Veusz-discuss mailing list Veusz-discuss@gna.org https://mail.gna.org/listinfo/veusz-discuss
