Re: [Matplotlib-users] Colorbar Ticks
Thank you very much for your email. Your example >imshow(rand(10,10)*8, vmin=0, vmax=8) >colorbar(ticks=[0,2,4,6,8]) works fine. >Note also that to get the sequence [0,2,4,6,8] you need arange(0,9,2), >not arange(0,8,2). Or you can use linspace(0,8,5) if you prefer. Thank you for making me aware of that (You see that I don't have a lot of experience in python and matplotlib). I now specified the color range via vmin and vmax, and this solved my problem. Thanks for the fast help -- View this message in context: http://www.nabble.com/Colorbar-Ticks-tp23712716p23713404.html Sent from the matplotlib - users mailing list archive at Nabble.com. -- Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT is a gathering of tech-side developers & brand creativity professionals. Meet the minds behind Google Creative Lab, Visual Complexity, Processing, & iPhoneDevCamp asthey present alongside digital heavyweights like Barbarian Group, R/GA, & Big Spaceship. http://www.creativitycat.com ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Colorbar Ticks
marcusantonius wrote: > I should perhaps mention, that if i try > cbar=fig.colorbar(p1,orientation='horizontal',ticks=[0.0,2.0,4.0,6.0,8.0]) The ticks that it uses are taken from the list--they are the ones that are within the range of numbers mapped to colors. The list of ticks does not set that range. > cbar.ax.set_xticklabels(['0', '2', '4','6','8']) Setting ticklabels is dangerous unless you do it based on first getting the actual ticks and using their values, or if you are otherwise sure of their values. But it should be very rare that you have to do this. > the colorbar is drawn correctly, but I get the label 0 at position 2, the > label 2 at position 4 and 4 at pos. 6, the labels at the end are not > drawn... None of the labels correspond to their ticks in this case. Eric -- Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT is a gathering of tech-side developers & brand creativity professionals. Meet the minds behind Google Creative Lab, Visual Complexity, Processing, & iPhoneDevCamp asthey present alongside digital heavyweights like Barbarian Group, R/GA, & Big Spaceship. http://www.creativitycat.com ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Colorbar Ticks
marcusantonius wrote: > Hello, > > I have the problem, that sometimes the first and last ticklabel of a > colorbar is not drawn. E.g. if I create a colorbar through > fig.colorbar(p3,orientation='horizontal',ticks=np.arange(0.0,8,2)) > I only get ticklabels at 2,4,6, but I would like it to have 0,2,4,6,8 and I > don't know how to control this behaviour. If I do > cb=fig.colorbar(p3,orientation='horizontal',ticks=np.arange(0.0,8,2)) > cb.ax.xaxis.set_ticks(np.arange(0,8,2)) > the colorbar vanishes and instead I have 4 ticks with the labels > 0.8,1.6,2.4,3.2 > > Thank you for your help, > Markus > > Markus, The problem here is not the specification of the ticks, it is the actual range of the colorbar, which is taken from the norm object used in the color mapping. Try this (in ipython -pylab): imshow(rand(10,10)*8, vmin=0, vmax=8) colorbar(ticks=[0,2,4,6,8]) Alternatively, you can use the set_clim() method on any Mappable such as an image, or the pyplot clim() function, to set the limits. Note also that to get the sequence [0,2,4,6,8] you need arange(0,9,2), not arange(0,8,2). Or you can use linspace(0,8,5) if you prefer. Eric -- Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT is a gathering of tech-side developers & brand creativity professionals. Meet the minds behind Google Creative Lab, Visual Complexity, Processing, & iPhoneDevCamp asthey present alongside digital heavyweights like Barbarian Group, R/GA, & Big Spaceship. http://www.creativitycat.com ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Colorbar Ticks
I should perhaps mention, that if i try cbar=fig.colorbar(p1,orientation='horizontal',ticks=[0.0,2.0,4.0,6.0,8.0]) cbar.ax.set_xticklabels(['0', '2', '4','6','8']) the colorbar is drawn correctly, but I get the label 0 at position 2, the label 2 at position 4 and 4 at pos. 6, the labels at the end are not drawn... -- View this message in context: http://www.nabble.com/Colorbar-Ticks-tp23712716p23712944.html Sent from the matplotlib - users mailing list archive at Nabble.com. -- Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT is a gathering of tech-side developers & brand creativity professionals. Meet the minds behind Google Creative Lab, Visual Complexity, Processing, & iPhoneDevCamp asthey present alongside digital heavyweights like Barbarian Group, R/GA, & Big Spaceship. http://www.creativitycat.com ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Colorbar Ticks
Hello, I have the problem, that sometimes the first and last ticklabel of a colorbar is not drawn. E.g. if I create a colorbar through fig.colorbar(p3,orientation='horizontal',ticks=np.arange(0.0,8,2)) I only get ticklabels at 2,4,6, but I would like it to have 0,2,4,6,8 and I don't know how to control this behaviour. If I do cb=fig.colorbar(p3,orientation='horizontal',ticks=np.arange(0.0,8,2)) cb.ax.xaxis.set_ticks(np.arange(0,8,2)) the colorbar vanishes and instead I have 4 ticks with the labels 0.8,1.6,2.4,3.2 Thank you for your help, Markus -- View this message in context: http://www.nabble.com/Colorbar-Ticks-tp23712716p23712716.html Sent from the matplotlib - users mailing list archive at Nabble.com. -- Register Now for Creativity and Technology (CaT), June 3rd, NYC. CaT is a gathering of tech-side developers & brand creativity professionals. Meet the minds behind Google Creative Lab, Visual Complexity, Processing, & iPhoneDevCamp asthey present alongside digital heavyweights like Barbarian Group, R/GA, & Big Spaceship. http://www.creativitycat.com ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
