Mailman 3 December 2017 - Matplotlib-users

ToolManager
by Juan Nunez-Iglesias April 28, 2018

April 28, 2018

Hi, I’m trying to add elements to the matplotlib toolbar *using the Qt5 backend*. I tried running this example code: https://matplotlib.org/examples/user_interfaces/toolmanager.html But unfortunately it fails when using Qt5 with the error fig.canvas.manager.toolmanager.add_tool('List', ListTools) AttributeError: 'FigureManagerQT' object has no attribute ‘toolmanager' Is toolmanager only available for GTK? Is there an equivalent way of achieving what the script is doing in other backends? Thanks, Juan.

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automatic list of r'$2$'...
by Vincent Douce Mathoscope April 20, 2018

April 20, 2018

hi i try this : ''' Lx,x,Ly,y=[],xmin,[],ymin Lrx,Lry=[],[] while (x<=xmax): Lx.append(x) Lrx.append("$".join(["r'",str(x),"'"])) x+=1 while (y<=ymax): Ly.append(y) y+=1 ''' but it creates a Lrx list like this : ["r'$-2.5$'", "r'$-1.5$'", "r'$-0.5$'", "r'$0.5$'", "r'$1.5$'", "r'$2.5$'"] and i want to obtain [r'$-2.5$', r'$-1.5$', r'$-0.5$', r'$0.5$', r'$1.5$', r'$2.5$'] i guess that r is an operator to deal with the $..$ expressions but not understand how to fix my definition thanks for your help Vincent –––––––––––––––––––––––––– Vincent Douce :=: Mathoscope :=: http://mathoscope.xyz <http://mathoscope.xyz/> 06°13°11°07°26 Bagnères de Bigorre 65200

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3D
by Vincent Douce Mathoscope Jan. 2, 2018

Jan. 2, 2018

hi happy christmas ! i have some projects with 3D impressions and i am wondering which would be the best solution in order to use my some of my equations still written in matplotlib what would you advise me to create some 3D drawings ? i need the functionality to export my pictures in STL format thanks –––––––––––––––––––––––––– Vincent Douce :=: Mathoscope :=: http://mathoscope.xyz 06°13°11°07°26 Bagnères de Bigorre 65200

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empty scatter
by Vincent Douce Mathoscope Dec. 26, 2017

Dec. 26, 2017

hi i can not find on the documentation of matplotlib if a scatter can be empty i have made a program that calculates the position of the finger on a guitar : https://mathoscope.wordpress.com/2017/12/25/mathematiques-pour-la-guitare/ <https://mathoscope.wordpress.com/2017/12/25/mathematiques-pour-la-guitare/> you can see the source code here by clicking on "programme.txt" http://mathoscope.ouvaton.org/mathoscope_xyz/Informatique/distributeur.php?… <http://mathoscope.ouvaton.org/mathoscope_xyz/Informatique/distributeur.php?…> i would like the grey scaters on the left (coresponding to the chords played withou pressing them or "cordes à vide") to be black but empty like a "O" of course i can calculate a circle... do you think there is a means to have an empty scatter ? –––––––––––––––––––––––––– Vincent Douce :=: Mathoscope :=: http://mathoscope.xyz 06°13°11°07°26 Bagnères de Bigorre 65200

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Re: [Matplotlib-users] GOES projection corners
by admin＠ndws.com Dec. 22, 2017

Dec. 22, 2017

Hi, trying to overlay maps on the new GOES16 satellite images from the raw data direct from the satellite. They send metadata indicating the corners of the image, but they send ULcrnr and LRcrnr instead of what maplotlib wants, LLcrne and URcrnr. Any suggestion on how to get the numbers maplotlib wants, or use the ones sent? Thanks! Ray

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Reds and Greens colormap starting with black
by Kesavan Subburam Dec. 21, 2017

Dec. 21, 2017

Hi matplotlib users, I was wondering if anyone knows a way to modify the Reds and Greens colormap such that the lower end of the colormaps is not a mixture of white and red or green, but black and red or green respectively. I tried to do this by making the image RGB, with my data only in the red or green channel, but matplotlib only supports int8 but my images have higher dynamic range, and they lose resolution if I cast them from int16 to int8. Here's the code: def color(img): x, y = img.shape c = np.zeros((x, y, 3), dtype=np.uint8) c[:, :, 0] = img return c Thank you and best regards, Kesavan

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NxM subplots, tight, suptitle
by Heiland, Randy Dec. 17, 2017

Dec. 17, 2017

Any advice for wanting to do a grid of subplots, with fig.tight_layout(), and with "extra” space at the top for a suptitle? As this simple script demonstrates, there isn’t really any space left at the top after doing tight_layout: import matplotlib.pyplot as plt fig, axes = plt.subplots(nrows=1, ncols=2, figsize=(12,4)) ax0, ax1 = axes.flatten() fig.tight_layout() plt.suptitle('This is a somewhat long figure title', y=0.99, fontsize=12) plt.show() thanks! Randy

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numbering of x axis
by Vincent Douce Mathoscope Dec. 16, 2017

Dec. 16, 2017

on these pictures you can see that the x-axe-numbering is truncated i tryed ''' fig.tight_layout() # to nicely fit the subplot(s) in the figure ''' but the picture gets a too large white band around i would like just to increase the margin under the figure so that the x numbering be visible how to do it ? i spend time on http://matplotlib.org/api/pyplot_api.html but dont always find what i am looking for thanks –––––––––––––––––––––––––– Vincent Douce :=: Mathoscope :=: http://mathoscope.xyz 06°13°11°07°26 Bagnères de Bigorre 65200

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SOLVED: figures from ipython within emacs on Windows
by Strozzi, David J. Dec. 15, 2017

Dec. 15, 2017

Hi, This is an issue I bugged several people / lists about previously, which has a solution. Thought I'd share it. I am running the GNU Win32 native build of emacs (ver. 25.3), on Windows 7 (not a cygwin or X11 version). I'm one of those "emacs is an operating system" people, and like running Python shells within emacs. The problem was getting matplotlib figures to work - the figure window would either say "not responding", not render, freeze, or somehow misbehave. Someone involved in the elpy package (for python on emacs) gave the following solution, which works for me using the TkAgg or Qt5Agg backends: use jupyter console instead of ipython. The whole thing is murky to me, but I thought that nowadays ipython is the Python-specific "piece" / interface to jupyter console. Either way, it seems like jupyter console just gives me ipython, but apparently in a way that the event loop or whatever with figure windows is "happy". So Add this to your .emacs: (setq python-shell-interpreter "jupyter" python-shell-interpreter-args "console --simple-prompt") (setq python-shell-completion-native-enable nil) Then M-x run-python, then pylab, then figure(1) etc. and it should work. Hope this helps more people use emacs as their Windows Python IDE. Dave

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NumFOCUS End-of-Year Fundraising Drive (Matplotlib fiscal sponsor)
by Gina Helfrich Dec. 15, 2017

Dec. 15, 2017

Hi folks, NumFOCUS, the nonprofit that provides fiscal sponsorship for Matplotlib, kicks off our end of year fundraising drive officially on Monday and would really appreciate your support! Andy Terrel, NumFOCUS Board President, has generously put up the first $5,000 donation as a matching challenge to the community. For every dollar the community donates, Andy will donate a dollar, up to $5k. Please spread the word and use this link to donate: https://www.flipcause.com/secure/cause_pdetails/Mjc2NTg= Thanks so much for your support of Matplotlib and NumFOCUS! Cheers, Gina -- Dr. Gina Helfrich Communications Director, NumFOCUS

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