Re: [Matplotlib-users] colorbar+log+latex
Hi All, Thanks a bunch for your help! Eric: your suggestion works brilliantly ( I didn't use the interpolation kwarg though because I like the 'smudged' look). Paul: thanks for your suggestions but I get errors when trying to execute * cbar.set_ticks(np.linspace(300,350,6))*. The c.bar.set_ticks option doesn't seem to exist.. All I now need to figure out is how to get the log scale ticklabels to show for a different imshow plot... cheers! Shrividya -- 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
Re: [Matplotlib-users] colorbar+log+latex
Hi there,
I too want a log scale on the colorbar for an imshow plot. I have tried the
solution proposed by Jae-Joon but I cannot get the ticklabels to show. I
have tried to dynamically change the matplotlibrc settings in ipython using
mpl.rc('text',usetex=True) - where mpl = matplotlib. When I run the script I
get a whole series of errors (see in italics below) and the figure doesn't
show.
*
RuntimeError: Could not obtain dvipng version
Exception in Tkinter callback
*
Is there another way to get a colorbar with a log scale?
On the same topic of the colorbar, how can I readjust the colors such that
it only goes between user-specified values? For example, I have one imshow
plot where the values range between 0 and 350. However, I only want to look
at the values between 300 and 350.
Any help would be greatly appreciated!
Thanks a lot!
Shrividya
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Re: [Matplotlib-users] colorbar+log+latex
On 01/25/2011 06:58 PM, Shrividya Ravi wrote: [...] On the same topic of the colorbar, how can I readjust the colors such that it only goes between user-specified values? For example, I have one imshow plot where the values range between 0 and 350. However, I only want to look at the values between 300 and 350. z = np.arange(25) z.shape = 5,5 imshow(z, vmin=10, vmax=20, interpolation='nearest') colorbar(extend='both') Does that give the desired result? Eric Any help would be greatly appreciated! Thanks a lot! Shrividya -- 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
Re: [Matplotlib-users] colorbar+log+latex
Eric Firing, on 2011-01-25 19:52, wrote: On 01/25/2011 06:58 PM, Shrividya Ravi wrote: [...] On the same topic of the colorbar, how can I readjust the colors such that it only goes between user-specified values? For example, I have one imshow plot where the values range between 0 and 350. However, I only want to look at the values between 300 and 350. z = np.arange(25) z.shape = 5,5 imshow(z, vmin=10, vmax=20, interpolation='nearest') colorbar(extend='both') Does that give the desired result? Hi Shrividya, Here's how I interpreted what was being asked, in case that helps. Also, Eric, is there a reason we make an outline instead of just cbar.ax.set_frame_on? - My manual adjustments screw up and confuse whatever data cbar.outline depends on x = np.random.rand(100) y = np.random.rand(100) z = np.random.rand(100) collection = plt.scatter(x, y, c=z*350, vmin=0, vmax=350) cbar = plt.colorbar() cbar.ax.set_ylim(cbar.norm((300,350))) cbar.ax.set_xlim(cbar.norm((300,350))) # maintain aspect ratio cbar.set_ticks(np.linspace(300,350,6)) # didn't see a quick way to fix the outline cbar.outline.set_visible(False) cbar.ax.set_frame_on(True) plt.draw() best, -- Paul Ivanov 314 address only used for lists, off-list direct email at: http://pirsquared.org | GPG/PGP key id: 0x0F3E28F7 signature.asc Description: Digital signature -- 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
Re: [Matplotlib-users] colorbar+log+latex
On 01/25/2011 08:51 PM, Paul Ivanov wrote: Eric Firing, on 2011-01-25 19:52, wrote: On 01/25/2011 06:58 PM, Shrividya Ravi wrote: [...] On the same topic of the colorbar, how can I readjust the colors such that it only goes between user-specified values? For example, I have one imshow plot where the values range between 0 and 350. However, I only want to look at the values between 300 and 350. z = np.arange(25) z.shape = 5,5 imshow(z, vmin=10, vmax=20, interpolation='nearest') colorbar(extend='both') Does that give the desired result? Hi Shrividya, Here's how I interpreted what was being asked, in case that helps. (Your interpretation seems like a very strange thing to want to do, but maybe you are right. The OP can inform us.) Also, Eric, is there a reason we make an outline instead of just cbar.ax.set_frame_on? - My manual adjustments screw up and confuse whatever data cbar.outline depends on Yes, we need to make our own outline because a colorbar does not have to be a rectangle; it can be pointed at either end or both ends. Eric x = np.random.rand(100) y = np.random.rand(100) z = np.random.rand(100) collection = plt.scatter(x, y, c=z*350, vmin=0, vmax=350) cbar = plt.colorbar() cbar.ax.set_ylim(cbar.norm((300,350))) cbar.ax.set_xlim(cbar.norm((300,350))) # maintain aspect ratio cbar.set_ticks(np.linspace(300,350,6)) # didn't see a quick way to fix the outline cbar.outline.set_visible(False) cbar.ax.set_frame_on(True) plt.draw() best, -- 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
Re: [Matplotlib-users] colorbar+log+latex
Ok, great, it works ! However, I do not understand why latex mode is disabled by default... Anyway, thanks a lot, yves Jae-Joon Lee wrote: I'm not sure if the default formatter needs to be changed. However, you may try import matplotlib.ticker as ticker formatter=ticker.LogFormatterMathtext() colorbar(format=formatter) which will render colorbar ticklabels with mathtext mode. Regards, -JJ On Fri, Apr 16, 2010 at 3:56 AM, Yves Revaz yves.re...@epfl.ch wrote: Dear list, I want to plot colored points using scatter, with the color of points corresponding to the log of the z value of the points. the corresponding scatter command is : scatter(x,y,c=z,norm=colors.LogNorm()) unfortunately, then I then draw a colorbar simply calling colorbar() the fonts used for the color bar is no longer in latex mode, as it was if I use a lin scale in scatter(), i.e., norm=None. Is it a bug ? Any solution ? Thanks, yves -- (o o) oOO--(_)--OOo--- Dr. Yves Revaz Laboratory of Astrophysics EPFL Observatoire de Sauverny Tel : ++ 41 22 379 24 28 51. Ch. des Maillettes Fax : ++ 41 22 379 22 05 1290 Sauverny e-mail : yves.re...@epfl.ch SWITZERLAND Web : http://www.lunix.ch/revaz/ -- Download Intel#174; 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 -- (o o) oOO--(_)--OOo--- Dr. Yves Revaz Laboratory of Astrophysics EPFL Observatoire de Sauverny Tel : ++ 41 22 379 24 28 51. Ch. des Maillettes Fax : ++ 41 22 379 22 05 1290 Sauverny e-mail : yves.re...@epfl.ch SWITZERLAND Web : http://www.lunix.ch/revaz/ -- Download Intel#174; 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
Re: [Matplotlib-users] colorbar+log+latex
I'm not sure if the default formatter needs to be changed. However, you may try import matplotlib.ticker as ticker formatter=ticker.LogFormatterMathtext() colorbar(format=formatter) which will render colorbar ticklabels with mathtext mode. Regards, -JJ On Fri, Apr 16, 2010 at 3:56 AM, Yves Revaz yves.re...@epfl.ch wrote: Dear list, I want to plot colored points using scatter, with the color of points corresponding to the log of the z value of the points. the corresponding scatter command is : scatter(x,y,c=z,norm=colors.LogNorm()) unfortunately, then I then draw a colorbar simply calling colorbar() the fonts used for the color bar is no longer in latex mode, as it was if I use a lin scale in scatter(), i.e., norm=None. Is it a bug ? Any solution ? Thanks, yves -- (o o) oOO--(_)--OOo--- Dr. Yves Revaz Laboratory of Astrophysics EPFL Observatoire de Sauverny Tel : ++ 41 22 379 24 28 51. Ch. des Maillettes Fax : ++ 41 22 379 22 05 1290 Sauverny e-mail : yves.re...@epfl.ch SWITZERLAND Web : http://www.lunix.ch/revaz/ -- Download Intel#174; 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#174; 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
