## [Matplotlib-users] Decouple the colorbar form subplot

 [Matplotlib-users] Decouple the colorbar form subplot From: SiggiN - 2011-07-11 14:13:11 ```Hi all! following code shows the problem I have with placing a colorbar for several subplots. #-----------------------------code------------ import matplotlib import numpy as np import matplotlib.cm as cm import matplotlib.mlab as mlab import matplotlib.pyplot as plt matplotlib.rcParams['xtick.direction'] = 'out' matplotlib.rcParams['ytick.direction'] = 'out' delta = 0.025 x = np.arange(-3.0, 3.0, delta) y = np.arange(-2.0, 2.0, delta) X, Y = np.meshgrid(x, y) Z1 = mlab.bivariate_normal(X, Y, 1.0, 1.0, 0.0, 0.0) Z2 = mlab.bivariate_normal(X, Y, 1.5, 0.5, 1, 1) # difference of Gaussians Z = 10.0 * (Z2 - Z1) plt.figure() plt.subplot(211) CS = plt.contourf(X, Y, Z) plt.subplot(212) CS = plt.contourf(X, Y, Z) plt.colorbar(orientation='horizontal') plt.show() #-------------end code-------------- result: http://old.nabble.com/file/p32037832/inttest.png is ther a way to not let the colorbar cut space from the 2nd subplot. I would like to have them both the same size. Thanks! Siggi -- View this message in context: http://old.nabble.com/Decouple-the-colorbar-form-subplot-tp32037832p32037832.html Sent from the matplotlib - users mailing list archive at Nabble.com. ```

 [Matplotlib-users] Decouple the colorbar form subplot From: SiggiN - 2011-07-11 14:13:11 ```Hi all! following code shows the problem I have with placing a colorbar for several subplots. #-----------------------------code------------ import matplotlib import numpy as np import matplotlib.cm as cm import matplotlib.mlab as mlab import matplotlib.pyplot as plt matplotlib.rcParams['xtick.direction'] = 'out' matplotlib.rcParams['ytick.direction'] = 'out' delta = 0.025 x = np.arange(-3.0, 3.0, delta) y = np.arange(-2.0, 2.0, delta) X, Y = np.meshgrid(x, y) Z1 = mlab.bivariate_normal(X, Y, 1.0, 1.0, 0.0, 0.0) Z2 = mlab.bivariate_normal(X, Y, 1.5, 0.5, 1, 1) # difference of Gaussians Z = 10.0 * (Z2 - Z1) plt.figure() plt.subplot(211) CS = plt.contourf(X, Y, Z) plt.subplot(212) CS = plt.contourf(X, Y, Z) plt.colorbar(orientation='horizontal') plt.show() #-------------end code-------------- result: http://old.nabble.com/file/p32037832/inttest.png is ther a way to not let the colorbar cut space from the 2nd subplot. I would like to have them both the same size. Thanks! Siggi -- View this message in context: http://old.nabble.com/Decouple-the-colorbar-form-subplot-tp32037832p32037832.html Sent from the matplotlib - users mailing list archive at Nabble.com. ```
 Re: [Matplotlib-users] Decouple the colorbar form subplot From: Sebastian Berg - 2011-07-11 16:17:13 ```Hi, On Mon, 2011-07-11 at 07:13 -0700, SiggiN wrote: > Hi all! > > following code shows the problem I have with placing a colorbar for several > subplots. > > #-----------------------------code------------ > import matplotlib > import numpy as np > import matplotlib.cm as cm > import matplotlib.mlab as mlab > import matplotlib.pyplot as plt > > matplotlib.rcParams['xtick.direction'] = 'out' > matplotlib.rcParams['ytick.direction'] = 'out' > > delta = 0.025 > x = np.arange(-3.0, 3.0, delta) > y = np.arange(-2.0, 2.0, delta) > X, Y = np.meshgrid(x, y) > Z1 = mlab.bivariate_normal(X, Y, 1.0, 1.0, 0.0, 0.0) > Z2 = mlab.bivariate_normal(X, Y, 1.5, 0.5, 1, 1) > # difference of Gaussians > Z = 10.0 * (Z2 - Z1) > > plt.figure() > > plt.subplot(211) > CS = plt.contourf(X, Y, Z) > > > plt.subplot(212) > CS = plt.contourf(X, Y, Z) > > > plt.colorbar(orientation='horizontal') > plt.show() > > #-------------end code-------------- > result: > http://old.nabble.com/file/p32037832/inttest.png > > is ther a way to not let the colorbar cut space from the 2nd subplot. I > would like to have them both the same size. > the subplot command only takes from the last axes as default. What you need to do (I think and I always do it like this) Define 3 sets of axes by hand instead of subplot(211) you use plt.axes(...) to create them (I guess there may be a nicer method, not sure). Then you can pass which axes to draw into with the colorbar function. Regards, Sebastian ```
 Re: [Matplotlib-users] Decouple the colorbar form subplot From: Benjamin Root - 2011-07-11 16:28:31 Attachments: Message as HTML ```On Mon, Jul 11, 2011 at 11:16 AM, Sebastian Berg wrote: > Hi, > > > On Mon, 2011-07-11 at 07:13 -0700, SiggiN wrote: > > Hi all! > > > > following code shows the problem I have with placing a colorbar for > several > > subplots. > > > > #-----------------------------code------------ > > import matplotlib > > import numpy as np > > import matplotlib.cm as cm > > import matplotlib.mlab as mlab > > import matplotlib.pyplot as plt > > > > matplotlib.rcParams['xtick.direction'] = 'out' > > matplotlib.rcParams['ytick.direction'] = 'out' > > > > delta = 0.025 > > x = np.arange(-3.0, 3.0, delta) > > y = np.arange(-2.0, 2.0, delta) > > X, Y = np.meshgrid(x, y) > > Z1 = mlab.bivariate_normal(X, Y, 1.0, 1.0, 0.0, 0.0) > > Z2 = mlab.bivariate_normal(X, Y, 1.5, 0.5, 1, 1) > > # difference of Gaussians > > Z = 10.0 * (Z2 - Z1) > > > > plt.figure() > > > > plt.subplot(211) > > CS = plt.contourf(X, Y, Z) > > > > > > plt.subplot(212) > > CS = plt.contourf(X, Y, Z) > > > > > > plt.colorbar(orientation='horizontal') > > plt.show() > > > > #-------------end code-------------- > > result: > > http://old.nabble.com/file/p32037832/inttest.png > > > > is ther a way to not let the colorbar cut space from the 2nd subplot. I > > would like to have them both the same size. > > > > the subplot command only takes from the last axes as default. What you > need to do (I think and I always do it like this) Define 3 sets of axes > by hand instead of subplot(211) you use plt.axes(...) to create them (I > guess there may be a nicer method, not sure). Then you can pass which > axes to draw into with the colorbar function. > > Regards, > > Sebastian > > Personally, I prefer to use the axes_grid toolkit that allows you to specify if and how you want colorbar axes and provides an array of colorbar axes. http://matplotlib.sourceforge.net/mpl_toolkits/axes_grid/index.html#toolkit-axesgrid-index Enjoy! Ben Root ```
 Re: [Matplotlib-users] Decouple the colorbar form subplot From: Paul Ivanov - 2011-07-11 16:39:24 Attachments: application/pgp-signature ```Sebastian Berg, on 2011-07-11 18:16, wrote: > On Mon, 2011-07-11 at 07:13 -0700, SiggiN wrote: > > is ther a way to not let the colorbar cut space from the 2nd subplot. I > > would like to have them both the same size. yes, you can pass the cax parameter to colorbar which will put it inside that axis. replace your code from line 'plt.figure()' with this: f,(ax,ax2,ax3) = plt.subplots(3,1) CS = ax.contourf(X, Y, Z) CS = ax2.contourf(X, Y, Z) plt.colorbar(CS,cax=ax3,orientation='horizontal') > What you need to do (I think and I always do it like this) > Define 3 sets of axes by hand instead of subplot(211) you use > plt.axes(...) to create them (I guess there may be a nicer > method, not sure). I belive the plt.subplots() command is what Sebastian was referring to. best, -- Paul Ivanov 314 address only used for lists, off-list direct email at: http://pirsquared.org | GPG/PGP key id: 0x0F3E28F7 ```
 Re: [Matplotlib-users] Decouple the colorbar form subplot From: SiggiN - 2011-07-22 19:17:13 ```First, thanks to you for your answers! I tried all the solutions and the one with the AxisGrid Toolkit worked out best for me. There are only some small questions left. How do I change the origin and how do I change fontsize of the ticklabels? #-----------------------------code------------ import matplotlib import numpy as np import matplotlib.cm as cm import matplotlib.mlab as mlab import matplotlib.pyplot as plt from mpl_toolkits.axes_grid1 import AxesGrid import pylab as pyl matplotlib.rcParams['xtick.direction'] = 'out' matplotlib.rcParams['ytick.direction'] = 'out' delta = 0.5 x = np.arange(0, 90.0, delta) y = np.arange(0, 90.0, delta) X, Y = np.meshgrid(x, y) Z1 = mlab.bivariate_normal(X, Y, 16.0, 17.0, 60.0, 60.0) Z2 = mlab.bivariate_normal(X, Y, 16.5, 23.5, 45, 45) # difference of Gaussians Z = 10.0 * (Z2 - Z1) #plt.figure() f,(ax,ax2,ax3) = plt.subplots(3,1) CS = ax.contourf(X, Y, Z) CS = ax2.contourf(X, Y, Z) plt.colorbar(CS,cax=ax3,orientation='horizontal') fig00 = plt.figure(figsize=(10,3.2), dpi=100, facecolor='w', edgecolor='k') grid = AxesGrid(fig00, 111, # similar to subplot(132) nrows_ncols = (1, 2), axes_pad = 0.4, share_all=True, label_mode = "L", cbar_pad = 0.2, cbar_location = "right", cbar_mode="single", ) p0 = grid[0].contourf(X, Y, Z,origin='upper') p20 = grid[1].contourf(X,Y,Z,origin= 'upper') #-------------not working--------- ylim = pyl.get(plt.gca(), 'ylim') plt.setp(plt.gca(), ylim=ylim[::-1])# #--------------------------------------- plt.colorbar(p0, cax = grid.cbar_axes[0]) for cax in grid.cbar_axes: cax.toggle_label(True) grid[0].set_xticks([0,90,45]) grid[0].set_yticks(pyl.arange(0,100,10)) grid[1].set_xticks([0,90,45]) grid[1].set_yticks(pyl.arange(0,100,10)) grid[0].set_xlabel('phi 1', fontsize=8) grid[1].set_xlabel('phi 1', fontsize=8) grid[0].set_ylabel('\$\Phi\$', fontsize=12) grid[1].set_ylabel('\$\Phi\$', fontsize=12) plt.show() Siggi -- View this message in context: http://old.nabble.com/Decouple-the-colorbar-form-subplot-tp32037832p32117770.html Sent from the matplotlib - users mailing list archive at Nabble.com. ```