Hi Jae-Joon, Thanks! This is exactly what I needed. Putting the colorbar on the right or bottom works great - however, I am running into issues with trying to put the colorbar on the left or bottom (which, from my understanding, is controlled by using pack_start=True?). Should the following code work?
import matplotlib.pyplot as mpl import numpy as np from mpl_toolkits.axes_grid import make_axes_locatable fig = mpl.figure() ax = fig.add_subplot(1,1,1) divider = make_axes_locatable(ax) cax = divider.new_horizontal(size="5%", pad=0.05, pack_start=True) fig.add_axes(cax) image = ax.imshow(np.random.random((100,100))) cb = fig.colorbar(image, cax=cax) Cheers, Thomas On Mar 4, 2010, at 10:28 PM, Jae-Joon Lee wrote: > see > > http://www.mail-archive.com/matplotlib-users@lists.sourceforge.net/msg15919.html > > axes_grid toolkit provides some helper function that utilizes > axes_locator (take a look at demo_locatable_axes_easy function in the > example below) > > http://matplotlib.sourceforge.net/examples/axes_grid/demo_axes_divider.html > > -JJ > > > > > On Thu, Mar 4, 2010 at 9:05 PM, Thomas Robitaille > <thomas.robitai...@gmail.com> wrote: >> Hi, >> >> I am trying to set up a colorbar that automatically resizes if I zoom in to >> an image (which changes the aspect ratio of the axes, so I want the colorbar >> to get resized too). Let's say I have two Axes instances, say ax (for the >> main image) and cax (for the colorbar). I can set up a callback if the view >> limits in one axes change, for example >> >> ax.callbacks.connect('xlim_changed', update_colorbar) >> ax.callbacks.connect('ylim_changed', update_colorbar) >> >> Now I can store a reference to cax inside ax: >> >> ax._cax = cax >> >> And I can now define update_colorbar so that it basically changes the >> position of cax: >> >> def update_colorbar(ax): >> >> # Get current position >> xmin = ax..get_position().xmin >> ... >> >> # Compute new colorbar position >> ... >> >> # Set new position >> ax._cax.set_position(...) >> >> # Return axes instance >> return ax >> >> Now the issue is that if I select a region of the image to zoom into, then >> as soon as I've selected the region, update_colorbar gets called, but by >> then, the aspect ratio of ax hasn't changed, and so the position I find when >> I do xmin = ax..get_position().xmin in update_colorbar is the *old* position >> of ax, not the new one. So the colorbar position is always one step behind >> compared to the main image axes. >> >> Can anyone think of any way that would avoid this issue, and to be able to >> use the *new* position of ax inside update_colorbar? >> >> Thanks in advance for any help, >> >> Thomas >> ------------------------------------------------------------------------------ >> Download Intel® Parallel Studio Eval >> Try the new software tools for yourself. Speed compiling, find bugs >> proactively, and fine-tune applications for parallel performance. >> See why Intel Parallel Studio got high marks during beta. >> http://p.sf.net/sfu/intel-sw-dev >> _______________________________________________ >> Matplotlib-users mailing list >> Matplotlib-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/matplotlib-users >> ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
