Hi folks, The calculus tutorial at
http://sage.math.washington.edu/home/elliottd/calctut/tangent.html contains the following code snippet: (plot(3/x, x, -3, 0)+plot(-3*x/4-3, -3, 0, rgbcolor='red')+point((-2, -3/2), \ rgbcolor='black', pointsize=30)).show(xmin=-3, xmax=0, ymin=-10, ymax=0) I executed that code under Sage 3.1.1 with Ubuntu 8.04 kernel 2.6.24-19-generic. My PC architecture is a Pentium 4, 3GHz with 1024 MB of RAM. However, after running that code, Sage gave me the overflow message below. Anyone has any ideas on what's going on? --- begin overflow message --- sage: (plot(3/x, x, -3, 0)+plot(-3*x/4-3, -3, 0, rgbcolor='red')+point((-2, -3/2),rgbcolor='black', pointsize=30)).show(xmin=-3, xmax=0, ymin=-10, ymax=0) --------------------------------------------------------------------------- OverflowError Traceback (most recent call last) /home/mvngu/<ipython console> in <module>() /home/mvngu/usr/bin/sage-3.1.1/local/lib/python2.5/site-packages/sage/plot/plot.py in show(self, xmin, xmax, ymin, ymax, figsize, filename, dpi, axes, axes_labels, frame, fontsize, aspect_ratio, gridlines, gridlinesstyle, vgridlinesstyle, hgridlinesstyle) 1363 gridlinesstyle=gridlinesstyle, 1364 vgridlinesstyle=vgridlinesstyle, -> 1365 hgridlinesstyle=hgridlinesstyle) 1366 os.system('%s %s 2>/dev/null 1>/dev/null &'%(sage.misc.viewer.browser(), filename)) 1367 /home/mvngu/usr/bin/sage-3.1.1/local/lib/python2.5/site-packages/sage/plot/plot.py in save(self, filename, xmin, xmax, ymin, ymax, figsize, figure, sub, savenow, dpi, axes, axes_labels, fontsize, frame, verify, aspect_ratio, gridlines, gridlinesstyle, vgridlinesstyle, hgridlinesstyle) 1514 if isinstance(g, GraphicPrimitive_MatrixPlot): 1515 matrixplot = True -> 1516 g._render_on_subplot(subplot) 1517 1518 #adjust the xy limits and draw the axes: /home/mvngu/usr/bin/sage-3.1.1/local/lib/python2.5/site-packages/sage/plot/plot.py in _render_on_subplot(self, subplot) 2363 s = int(options['pointsize']) 2364 faceted = options['faceted'] #faceted=True colors the edge of point -> 2365 subplot.scatter(self.xdata, self.ydata, s=s, c=c, alpha=a, faceted=faceted) 2366 2367 class GraphicPrimitive_Polygon(GraphicPrimitive): /home/mvngu/usr/bin/sage-3.1.1/local/lib/python2.5/site-packages/matplotlib/axes.py in scatter(self, x, y, s, c, marker, cmap, norm, vmin, vmax, alpha, linewidths, faceted, verts, **kwargs) 4242 corners = (minx-padx, miny-pady), (maxx+padx, maxy+pady) 4243 self.update_datalim( corners) -> 4244 self.autoscale_view() 4245 4246 # add the collection last /home/mvngu/usr/bin/sage-3.1.1/local/lib/python2.5/site-packages/matplotlib/axes.py in autoscale_view(self, tight, scalex, scaley) 1271 ylocator = self.yaxis.get_major_locator() 1272 yl = self.get_ybound() -> 1273 YL = ylocator.autoscale() 1274 self.set_ybound(YL) 1275 #### Drawing /home/mvngu/usr/bin/sage-3.1.1/local/lib/python2.5/site-packages/matplotlib/ticker.py in autoscale(self) 882 dmin, dmax = self.dataInterval.get_bounds() 883 dmin, dmax = mtrans.nonsingular(dmin, dmax, expander = 0.05) --> 884 return npy.take(self.bin_boundaries(dmin, dmax), [0,-1]) 885 886 /home/mvngu/usr/bin/sage-3.1.1/local/lib/python2.5/site-packages/matplotlib/ticker.py in bin_boundaries(self, vmin, vmax) 850 def bin_boundaries(self, vmin, vmax): 851 nbins = self._nbins --> 852 scale, offset = scale_range(vmin, vmax, nbins) 853 if self._integer: 854 scale = max(1, scale) /home/mvngu/usr/bin/sage-3.1.1/local/lib/python2.5/site-packages/matplotlib/ticker.py in scale_range(vmin, vmax, n, threshold) 818 offset = 0 819 elif meanv > 0: --> 820 ex = divmod(math.log10(meanv), 1)[0] 821 offset = 10**ex 822 else: OverflowError: math range error -- Regards Minh Van Nguyen Web: http://nguyenminh2.googlepages.com Blog: http://mvngu.wordpress.com --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
