On 02/03/2012 06:07 AM, Benjamin Root wrote: > > > On Fri, Feb 3, 2012 at 9:15 AM, Pål Gunnar Ellingsen <paa...@gmail.com > <mailto:paa...@gmail.com>> wrote: > > Hi > > Thank you for trying to help me, though I can't see how aspect is going > to help me. As I understand of the documentation, it would require > me to know the > relationship between x and y, which I don't. > I can calculate it, but since it varies between each change in xlimits > and different plot, it would be the same as calculating the ylimits. > > As for pyplot.xlim(xmin,xmax) (suggested by Ethan Swint), it does > the same as ax.set_xlim() for me. > > Below is a sample code that will illustrate the problem. > > Regards > > Pål > > ####### Start code ############ > > #!/usr/bin/env python > import matplotlib > matplotlib.use('Qt4Agg') # generate postscript output by default > > import matplotlib.pyplot as plt > import numpy as np > > # Creating a function to plot > x = np.linspace(-10, 10, 200) > p = np.poly1d([2, 3, 1, 4]) > y = p(x) * np.sin(x) > > # plotting the full figure > fig = plt.figure() > > ax = fig.add_subplot(111) > ax.plot(x, y) > ax.autoscale(tight=True) > plt.title('Full graph. (Press key for next plot)') > plt.draw() > > plt.waitforbuttonpress() > > # This is how I'm currently doing it > # x limits > xmin = 2 > xmax = 6 > > # Calculating y limits > ymin = y[np.logical_and(xmin < x, x < xmax)].min() > ymax = y[np.logical_and(xmin < x, x < xmax)].max() > > # Inserting some room > room = np.maximum(np.abs(ymin * 0.05), np.abs(ymax * 0.05)) > ymin = ymin + room * np.sign(ymin) > ymax = ymax + room * np.sign(ymax) > > # Setting the limits > ax.set_xlim([xmin, xmax]) > ax.set_ylim([ymin, ymax]) > > plt.title('What I want (Press key for next plot)') > plt.draw() > plt.waitforbuttonpress() > > # This is what pyplot does by default if I only set the limits > ax.autoscale(tight=True) > ax.set_xlim([2, 6]) > > plt.title('What I get if I only use set_xlim (Press key for exit)') > plt.draw() > plt.waitforbuttonpress() > plt.close() > > ####### End code ############ > > > > Ok, I see what you want. You want the y-limits to automatically change > to fit only the data that is displayed for the x-domain you have chosen.
This has never been supported; it would have to be a new option. I suspect it would be quite difficult to get this right in general, even though the concept seems simple enough. Eric > > I have tried some tricks, and I am not sure that it is currently > possible. There might even be some sort of bug at play here because the > function ax.update_datalim() does not appear to update the internal data > used for autoscaling. We might have to look into this further. > > Ben Root > > > > ------------------------------------------------------------------------------ > Try before you buy = See our experts in action! > The most comprehensive online learning library for Microsoft developers > is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, > Metro Style Apps, more. Free future releases when you subscribe now! > http://p.sf.net/sfu/learndevnow-dev2 > > > > _______________________________________________ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users ------------------------------------------------------------------------------ Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
