This turned out to be a bug in the legend code. This is now fixed in the maint. branch and the trunk.
Adam, Do you want these vertical lines show up in the legend? If not, the easiest workaround is to use some garbage label which starts with "_", i.e., vlines(3e10/6000e-8,1e-7,1e-4,linestyle='--', label="_nolabel") If you want, you may use axvline or plot instead, which creates a Line2D instance (instead of LineCollection) which will work fine with the legend. Regards, -JJ On Thu, Sep 17, 2009 at 4:28 PM, Adam Ginsburg <adam.ginsb...@colorado.edu> wrote: > Hi, I'm running into the following error: > > > findfont: Matching > :family=sans-serif:style=normal:variant=normal:weight=normal:stretch=normal:size=medium > to Bitstream Vera Sans (/usr/X11R6/lib/X11/fonts/TTF/Vera.ttf) with > score of 0.000000 > Found dvipng version 1.11 > findfont: Matching > :family=sans-serif:style=normal:variant=normal:weight=normal:stretch=normal:size=large > to Bitstream Vera Sans (/usr/X11R6/lib/X11/fonts/TTF/Vera.ttf) with > score of 0.000000 > Exception in Tkinter callback > Traceback (most recent call last): > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/lib-tk/Tkinter.py", > line 1410, in __call__ > return self.func(*args) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/backends/backend_tkagg.py", > line 212, in resize > self.show() > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/backends/backend_tkagg.py", > line 215, in draw > FigureCanvasAgg.draw(self) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/backends/backend_agg.py", > line 388, in draw > self.figure.draw(self.renderer) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/artist.py", > line 55, in draw_wrapper > draw(artist, renderer, *kl) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/figure.py", > line 772, in draw > for a in self.axes: a.draw(renderer) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/artist.py", > line 55, in draw_wrapper > draw(artist, renderer, *kl) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/axes.py", > line 1760, in draw > a.draw(renderer) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/artist.py", > line 55, in draw_wrapper > draw(artist, renderer, *kl) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/legend.py", > line 389, in draw > self._legend_box.draw(renderer) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/offsetbox.py", > line 240, in draw > c.draw(renderer) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/offsetbox.py", > line 240, in draw > c.draw(renderer) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/offsetbox.py", > line 240, in draw > c.draw(renderer) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/offsetbox.py", > line 240, in draw > c.draw(renderer) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/offsetbox.py", > line 504, in draw > c.draw(renderer) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/artist.py", > line 55, in draw_wrapper > draw(artist, renderer, *kl) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/lines.py", > line 530, in draw > drawFunc(renderer, gc, tpath, affine.frozen()) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/lines.py", > line 866, in _draw_lines > self._lineFunc(renderer, gc, path, trans) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/lines.py", > line 917, in _draw_dashed > renderer.draw_path(gc, path, trans) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/backends/backend_agg.py", > line 117, in draw_path > self._renderer.draw_path(gc, path, transform, rgbFace) > TypeError: float() argument must be a string or a number > Exception in Tkinter callback > Traceback (most recent call last): > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/lib-tk/Tkinter.py", > line 1410, in __call__ > return self.func(*args) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/backends/backend_tkagg.py", > line 212, in resize > self.show() > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/backends/backend_tkagg.py", > line 215, in draw > FigureCanvasAgg.draw(self) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/backends/backend_agg.py", > line 388, in draw > self.figure.draw(self.renderer) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/artist.py", > line 55, in draw_wrapper > draw(artist, renderer, *kl) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/figure.py", > line 772, in draw > for a in self.axes: a.draw(renderer) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/artist.py", > line 55, in draw_wrapper > draw(artist, renderer, *kl) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/axes.py", > line 1760, in draw > a.draw(renderer) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/artist.py", > line 55, in draw_wrapper > draw(artist, renderer, *kl) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/legend.py", > line 389, in draw > self._legend_box.draw(renderer) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/offsetbox.py", > line 240, in draw > c.draw(renderer) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/offsetbox.py", > line 240, in draw > c.draw(renderer) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/offsetbox.py", > line 240, in draw > c.draw(renderer) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/offsetbox.py", > line 240, in draw > c.draw(renderer) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/offsetbox.py", > line 504, in draw > c.draw(renderer) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/artist.py", > line 55, in draw_wrapper > draw(artist, renderer, *kl) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/lines.py", > line 530, in draw > drawFunc(renderer, gc, tpath, affine.frozen()) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/lines.py", > line 866, in _draw_lines > self._lineFunc(renderer, gc, path, trans) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/lines.py", > line 917, in _draw_dashed > renderer.draw_path(gc, path, trans) > File > "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/backends/backend_agg.py", > line 117, in draw_path > self._renderer.draw_path(gc, path, transform, rgbFace) > TypeError: float() argument must be a string or a number > > > Using the following code: > from pylab import * > import numpy,scipy,matplotlib; > h=6.626e-27 > c=3e10 > nu=3e18/5500. > k=1.38e-16 > T=6000 > mynu=linspace(1e13,10**15.2,100000) > dnu = mean(mynu[1:]-mynu[:-1]) > planck = 2*h*mynu**3/c**2 * (exp(h*mynu/(k*T))-1)**-1 > mylam=linspace(1500e-8,5e-4,100000) > dlam = mean(mylam[1:]-mylam[:-1]) > planckL=2*h*c**2/mylam**5*(exp(h*c/(mylam*k*T))-1)**-1; planckLn = > planckL* planck.max()/planckL.max() > figure(0); clf(); loglog(mynu,planck,label=r'$\nu$') > plot(3e10/mylam,planckLn,label=r'$\lambda$') > xlabel(r'$\nu$') > ylabel(r'$B_\nu$') > vlines(3e10/5500e-8,1e-7,1e-4) > vlines(3e10/6000e-8,1e-7,1e-4,linestyle='--') > vlines(3e10/5000e-8,1e-7,1e-4,linestyle='--') > legend(loc='best') > > figure(1); clf() > loglog(mynu,planck*mynu,label=r'$\nu$') > plot(3e10/mylam,planckL*mylam,label=r'$\lambda$') > vlines(3e10/5500e-8,1e6,2e10) > vlines(3e10/6000e-8,1e6,2e10,linestyle='--') > vlines(3e10/5000e-8,1e6,2e10,linestyle='--') > xlabel(r'$\nu = c / \lambda$') > ylabel(r'$\nu B_\nu = \lambda B_\lambda$') > legend(loc='best') > > > lamlow = 5000e-8 > lamhi = 6000e-8 > nulow = 3e10/lamhi > nuhi = 3e10/lamlow > whnu = (mynu<nuhi)*(mynu>nulow) > whlam = (mylam<lamhi)*(mylam>lamlow) > int_nu = (planck[whnu]*dnu).sum() > int_lam = (planckL[whlam]*dlam).sum() > > print "int_nu = %g" % (int_nu) > print "int_lam = %g" % (int_lam) > > show() > > > > The error only happens when I use a legend; i.e. there is no error > when the legend() lines are commented out. I've only explored a > little parameter space but it still happens without latex in the > labels and when I use a linear-linear plot. > > Adam > > ------------------------------------------------------------------------------ > Come build with us! The BlackBerry® Developer Conference in SF, CA > is the only developer event you need to attend this year. Jumpstart your > developing skills, take BlackBerry mobile applications to market and stay > ahead of the curve. Join us from November 9-12, 2009. Register now! > http://p.sf.net/sfu/devconf > _______________________________________________ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > ------------------------------------------------------------------------------ Come build with us! The BlackBerry® Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9-12, 2009. Register now! http://p.sf.net/sfu/devconf _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
