The automatic docstring generation for this command is badly fouled up, and I can't straighten it out right now. In the meantime, look at the docstring for FancyArrow.__init__ in patches.py. There is also a horrendously complicated example in examples/arrow_demo.py.
Depending on what you want to do, you might find the annotate command to be what you want. I think its docstring is in better shape, as its example: examples/annotate_demo.py. Eric Jessica Lu wrote: > I usually use the following to make single arrows: > > plot([0,1], 'k.') > arr1 = pylab.Arrow(0.5, 0.5, 0.1, 0.0, width=0.02) > fig = pylab.gca() > fig.add_patch(arr1) > > > If in "ipython -pylab" you need to savefig or send another command (e.g. > xlabel) or reload/refresh the plot (I can't remember the command) for > the new patch to display. I use this rather than arrow() because I can > control the arrow width and other properties. There is also the quiver > command which lets you draw many arrows: > > quiver([[0, 1, 2]], [[0, 1, 2]], [[0.0, 0.0, 0.0]], [[0.1, 0.1, 0.1]], 0.2) > > Cheers, > Jessica > > On Jul 20, 2007, at 6:32 AM, Alexander Dietz wrote: > >> Hi, >> >> How is the syntax for the matplotlib command 'arrow'? There is not >> very much to take from the help (see below). An example would be nice. >> >> Thanks >> Alex >> >> In [46]: arrow? >> Type: function >> Base Class: <type 'function'> >> String Form: <function arrow at 0xb77f8a3c> >> Namespace: Interactive >> File: /usr/lib/python2.4/site-packages/matplotlib/pylab.py >> Definition: arrow(*args, **kwargs) >> Docstring: >> Draws arrow on specified axis from (x,y) to (x+dx,y+dy). >> Optional kwargs control the arrow properties: >> alpha: float >> animated: [True | False] >> antialiased or aa: [True | False] >> axes: an axes instance >> clip_box: a matplotlib.transform.Bbox instance >> clip_on: [True | False] >> clip_path: an agg.path_storage instance >> edgecolor or ec: any matplotlib color >> facecolor or fc: any matplotlib color >> figure: a matplotlib.figure.Figure instance >> fill: [True | False] >> hatch: unknown >> label: any string >> linewidth or lw: float >> lod: [True | False] >> picker: [None|float|boolean|callable] >> transform: a matplotlib.transform transformation instance >> visible: [True | False] >> zorder: any number >> >> Addition kwargs: hold = [True|False] overrides default hold state >> >> ------------------------------------------------------------------------- >> This SF.net email is sponsored by: Microsoft >> Defy all challenges. Microsoft(R) Visual Studio 2005. >> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/_______________________________________________ >> Matplotlib-users mailing list >> Matplotlib-users@lists.sourceforge.net >> <mailto:Matplotlib-users@lists.sourceforge.net> >> https://lists.sourceforge.net/lists/listinfo/matplotlib-users > > > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2005. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > > > ------------------------------------------------------------------------ > > _______________________________________________ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
