Christopher Barker wrote: > Eric Firing wrote: >> Christopher Barker wrote: >>> Has anyone used MPL to make stick plots? If so, can I borrow your code? >> If no one volunteers anything, then I suggest using quiver(..., >> headlength=0, headwidth=0, headaxislength=0), together with >> quiverkey(...). This will effectively give you a stick plot, with lots >> of flexibility. > > Thanks, I was thinking that quiver() would get direction wrong, as the x > and y scales are in totally different units, but it looks like that's > not the case if you use the "angles" keyword: > > angles: [‘uv’ | ‘xy’ | array] > With the default ‘uv’, the arrow aspect ratio is 1, so that if > U*==*V the angle of the arrow on the plot is 45 degrees CCW from the > x-axis. With ‘xy’, the arrow points from (x,y) to (x+u, y+v). > Alternatively, arbitrary angles may be specified as an array of values > in degrees, CCW from the x-axis. > > > It could be implemented more efficiently in any of >> several ways, but it would take work to do it well. > > I hope I'll get time to do that, but I don't really like quiver stick > plots anyway. I prefer plots (that I don't know the name of) that: > > > Time is on the x axis > > Magnitude of the velocity is the x axis > > At each data point, there is a dot, and the direction is given with a > unit-length arrow originating at that dot, in the direction of the > observation.
I think this would be straightforward, using an ordinary plot command plus quiver. Eric > > I wrote a version of this a while back with the old MPL transforms > mechanism, but haven't taken the time to translate it. > > -Chris > > > > ------------------------------------------------------------------------------ The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your production scanning environment may not be a perfect world - but thanks to Kodak, there's a perfect scanner to get the job done! With the NEW KODAK i700 Series Scanner you'll get full speed at 300 dpi even with all image processing features enabled. http://p.sf.net/sfu/kodak-com _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
