Gökhan SEVER wrote: > Mayavi has a quiver3d function > (http://code.enthought.com/projects/mayavi/docs/development/html/mayavi/auto/mlab_helper_functions.html#quiver3d) > if you want to go a fancier way :)
which is cool, but I"m looking to plot a time series of a (2d) vector quantity at a single point. > Also what > you showed in your original post seem a little like wind-barbs, well > except without notches. yup -- stick plots are commonly used for wind data. -Chris > Gökhan > > > > On Wed, May 6, 2009 at 4:46 PM, Christopher Barker > <chris.bar...@noaa.gov> 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 wrote a version of this a while back with the old MPL transforms >> mechanism, but haven't taken the time to translate it. >> >> -Chris >> >> >> >> >> -- >> Christopher Barker, Ph.D. >> Oceanographer >> >> Emergency Response Division >> NOAA/NOS/OR&R (206) 526-6959 voice >> 7600 Sand Point Way NE (206) 526-6329 fax >> Seattle, WA 98115 (206) 526-6317 main reception >> >> chris.bar...@noaa.gov >> >> >> ------------------------------------------------------------------------------ >> 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 >> -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R (206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception chris.bar...@noaa.gov ------------------------------------------------------------------------------ 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
