On Sat, Nov 10, 2012 at 9:41 AM, Paul Hobson <pmhob...@gmail.com> wrote: > On Sat, Nov 10, 2012 at 7:07 AM, Chao YUE <chaoyue...@gmail.com> wrote: >> >> Dear all, >> >> Is there a way to reverse the colorbar label, the default is small value at >> the bottom and big value at the top, yet I would like the big value at the >> bottom and small value at the top. >> >> all code in pylab mode. >> >> import numpy as np >> import matplotlib as mat >> >> a = np.arange(100).reshape(10,10) >> contourf(a,levels=np.arange(0,101,10)) >> colorbar() >> >> in the above figure, colorbar label shows 0 at the bottom and 100 at the top. >> Yet I want the 0 at the top and the 100 at the bottom, with the same >> sequence of colors in the colorbar. >> >> One way is to reverse the cmap, and then reverse the colorbar labels at the >> same time: >> a = np.arange(100).reshape(10,10) >> contourf(a,levels=np.arange(0,101,10),cmap=mat.cm.jet_r) >> cbar = colorbar() >> cbar.set_ticks(np.arange(0,101,10)) >> cbar.set_ticklabels(np.arange(100,-1,-10)) > > Chao, > > I think it's as simple as: > > import numpy as np > import matplotlib.pyplot as plt > > a = np.arange(100).reshape(10,10) > fig, ax1 = plt.subplots() > CS = ax1.contourf(a,levels=np.arange(0,101,10)) > cbar = plt.colorbar(CS) > cbar.ax.invert_yaxis() > > Does that produce the desired results? > -p
Or, you could plot -a instead of a. -- Damon McDougall http://www.damon-is-a-geek.com Institute for Computational Engineering Sciences 201 E. 24th St. Stop C0200 The University of Texas at Austin Austin, TX 78712-1229 ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_nov _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
