On Wed, Dec 17, 2008 at 9:09 AM, Ken Schutte <kts.li...@gmail.com> wrote: > On Wed, Dec 17, 2008 at 1:49 AM, Jae-Joon Lee <lee.j.j...@gmail.com> wrote: >> >> This is a correct way indeed. >> I believe that you considered it as a plain line because the arrow >> head is too small. >> You need to adjust the mutation_scale parameter. Try >> >> c = matplotlib.patches.FancyArrowPatch((0.2, 0.2), (0.5, 0.5), >> arrowstyle="->", mutation_scale=20.) >> >> Maybe the defaults need to be changed. > > Great. Is there a way to draw filled in arrow heads? > > I'm thinking of arrows like those made by graphviz, such as, > http://www.graphviz.org/Gallery/directed/fsm.html > > The closest I can seem to get is like this, > c = matplotlib.patches.FancyArrowPatch((0.2, 0.2), (0.5, 0.5), > arrowstyle="simple", linewidth=0.1, fc='k',mutation_scale=20.) > > (a) I don't know if this is possible if the whole arrow is implemented as a > single polygon (i.e. to draw line with a triangle head), and (b) I'm a bit > confused about the kwargs to the different things like axes.arrow, > FancyArrowPatch, ArrowStyle, etc. (for example, arrow takes 'headwidth', > but FancyArrowPatch does not.). >
(a) As of now, there is no arrowclass that meets your need. The arrow is implemented as a single path, and it IS still possible to draw a line+a triangle. But, the artist only has a single "fill" mode and it is impossible to fill only a part of the path. It may be relatively easy to support. I'll take a look into it. (b) The FancyArrowPatch was very recently introduced and it's argument is not consistent with previous ones (Arrow,FancyArrow, YAArrow). Unlike other classes, FancyArrowPatch itself does not know how to draw an arrow. It delegates it to ArrowStyle. So, If you want to use FancyArrowPatch, "headwidth" should be given to ArrowStyle not to FancyArrowPatch itself. I agree this can be a bit confusing, but all the arrow-related parameters should be given to the style class. Take a look at "annotation_demo2.py" and see how it specifies the arrowstyle (and also connectionstyle). The 'arrowprops' parameter in the annotate function is mostly consumed by FancyArrowPatch class. Regards, -JJ > Thanks a lot, > Ken > > ------------------------------------------------------------------------------ SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
