[Matplotlib-users] Dynamic plots with matplotlib and wx on OS X

[Leighton P. <lp...@sc...>]

Hi,=0D=0A=0D=0AI'm having difficulty producing dynamic plots on OS X using =
matplotlib=0D=0A0.73.1 and wxPython 2.5.3.1 on OS X 10.3 with Python 2.3.5=0D=
=0A=0D=0AThe code below works with the same configuration on Fedora Core 3,=0D=
=0Aproducing a graph with a line that pivots at the origin.  On OS X,=0D=0A=
however, the frame remains blank and grey until the final plot is drawn,=0D=
=0Awhen the plot takes on the correct final state.=0D=0A=0D=0AI've tried si=
milar examples with bar graphs and scatter plots, and the=0D=0Asame results=
 are produced.  I don't know if this is a problem with=0D=0Amatplotlib or w=
xPython, and any help would be gratefully appreciated.=0D=0A=0D=0AIf you ne=
ed any more info to help, let me know.=0D=0A=0D=0AThe example code is:=0D=0A=0D=
=0A----------------=0D=0A=0D=0Aimport matplotlib=0D=0Amatplotlib.use("WXAgg=
")=0D=0Amatplotlib.interactive(True)=0D=0Afrom matplotlib.backends.backend_=
wx import FigureCanvasWx=0D=0Afrom matplotlib.figure import Figure=0D=0Afro=
m matplotlib.axes import Subplot=0D=0A=0D=0Afrom Numeric import pi, sin, ar=
ange=0D=0A=0D=0Aimport wx=0D=0A=0D=0A=0D=0Aclass PlotFigure(wx.Frame):=0D=0A=
    def __init__(self):=0D=0A        wx.Frame.__init__(self, None, -1, "Tes=
t embedded wxFigure")=0D=0A=0D=0A        self.fig =3D Figure((5,4), 75)=0D=0A=
        self.canvas =3D FigureCanvasWx(self, -1, self.fig)=0D=0A=0D=0A     =
   sizer =3D wx.BoxSizer(wx.VERTICAL)=0D=0A        sizer.Add(self.canvas, 1=
, wx.LEFT|wx.TOP|wx.GROW)=0D=0A        self.SetSizer(sizer)=0D=0A        se=
lf.Fit()=0D=0A=0D=0A    def init_plot_data(self):=0D=0A        self.a =3D s=
elf.fig.add_subplot(111)=0D=0A        x =3D arange(0,2*pi,0.01)           #=
 x-array=0D=0A        self.a.set_xlim((0., 2*pi))=0D=0A        self.a.set_y=
lim((-1., 1.))=0D=0A        self.line, =3D self.a.plot(x,x)=0D=0A=0D=0A    =
def update_data(self, i):=0D=0A        self.line.set_ydata(self.line.get_xd=
ata()*0.01*i)=0D=0A        self.canvas.draw()=0D=0A=0D=0A=0D=0Aif __name__ =
=3D=3D '__main__':=0D=0A    app =3D wx.PySimpleApp(0)=0D=0A    frame =3D Pl=
otFigure()=0D=0A    frame.Show(True)=0D=0A    frame.init_plot_data()=0D=0A =
   for i in arange(1,200):=0D=0A        frame.update_data(i)=0D=0A    app.M=
ainLoop()=0D=0A=0D=0A=0D=0A=0D=0A--=20=0D=0ADr Leighton Pritchard AMRSC=0D=0A=
D131, Plant-Pathogen Interactions, Scottish Crop Research Institute=0D=0AIn=
vergowrie, Dundee, Scotland, DD2 5DA, UK=0D=0AT: +44 (0)1382 562731 x2405 F=
: +44 (0)1382 568578=0D=0AE: lp...@sc...   W: http://bioinf.scri=
=2Esari.ac.uk/lp=0D=0AGPG/PGP: FEFC205C E58BA41B  http://www.keyserver.net =
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