On Thursday, January 27, 2011, Paul Ivanov <pivanov...@gmail.com> wrote: > Daniel Fulger, on 2011-01-27 18:16, wrote: >> Dear all, >> >> contourset = pyplot.contour(..) >> >> calculates the contourset but also grabs whatever figure is currently >> active *somewhere* in the entire code >> and whichever scope it was created. The contours are plotted into it. >> >> While I could possibly live with that, I would really like to >> suppress any plotting and grabbig of focus. Only the contourset >> should be calculated. >> >> I can't find anything that describes this. Everybody wants the plot, >> not me. >> >> I would like to avoid hte workaround to ask for the currently active >> figure (if!! there is one at all), store the number, and later return >> focus. Is there no switch parameter (in pyplot or for contour at >> least) that turns plotting off? > > Hi Daniel, > > I'm not sure if this gets at what you're asking for, but if > you just want the contours plotted on a figure other than the > currently active one, grab a handle to some other axes and call > contour from the axes itself (the parameters are the same). > Here's what I mean: > > ----------- > f,ax =plt.subplots(1,1) #grab handles to figure and axes > # or, if you're using an older version of matplotlib, do: > # f=plt.figure();ax=plt.subplot(1,1,1) > > > f2,ax2 =plt.subplots(1,1) # "f" no longer active figure > ... > contourset = ax.contour(...) # draw to the old figure "f" > ----------- > > You can read more about the difference between using pyplot and > using the object-oriented api here: > > http://matplotlib.sourceforge.net/faq/usage_faq.html > > On the other hand, if you just want the contour to not show up, > you can pass it alpha=0.0 to make it completely transparent and > invisible (but it's still there) > > contourset = pyplot.contour(.., alpha=0.0) > # later call contourset.set_alpha(1.0) to make visible again > > best, > -- > Paul Ivanov > 314 address only used for lists, off-list direct email at: > http://pirsquared.org | GPG/PGP key id: 0x0F3E28F7 >
I believe he would rather call the core function that contour uses to do the heavy lifting. This was something that one can do in matlab, btw. I don't have access to the source right now. What does contour call to perform this calculation? Ben Root ------------------------------------------------------------------------------ Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! Finally, a world-class log management solution at an even better price-free! Download using promo code Free_Logger_4_Dev2Dev. Offer expires February 28th, so secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsight-sfd2d _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
