Mailman 3 September 2017 - Matplotlib-devel

CI: only run macosx on travis cron jobs / only branches
by Thomas Caswell Jan. 19, 2018

Jan. 19, 2018

Folks, https://blog.travis-ci.com/2017-09-22-macos-update Due to the travis OSX infrastructure not being able to keep up with demand they are going to limit concurrency of jobs that us osx. We have not seen many (any?) mac specific issues which I think means we are not getting much value out of running all of the PRs on OSX. We can probably get better linux concurrency (and help lighten the load on travis) if we do test on OSX less. Thoughts? Tom

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feature request
by Rogier Delporte Oct. 2, 2017

Oct. 2, 2017

Dear maintainer(s) Dear developpers I would like to request a new matplotlib feature. The current version of matplotlib shows the coordinates of the cursor in the bottom right corner. It would be great if some option or mode could be added which snaps the cursor to data points. This would take some guesswork out of reading a plot with a lot of points. I know this feature is similar to the mpldatacursor toolkit, but mpldatacursor does not provide a smooth and fast way to pinpoint a data point. I hope someone would like to implement this feature, because I don't have sufficient programming skills to implement this myself. Thanks for the awesomeness that is matplotlib! Rogier

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Help with constrained_layout
by Jody Klymak Sept. 29, 2017

Sept. 29, 2017

Hi all, I know a lot of bandwidth has been taken up w/ the 2.1 release, but that seems to be settling down now. I’ve been working hard on the constraint-driven layout. This is an alternate to `tight_layout`, and based on [kiwi-solver](https://github.com/nucleic/kiwi/tree/master/py) I think its mostly feature-complete at this point, and handles numerous situations not handled by `tight_layout` like `suptitle`, over-spilling legends, colorbars that belong to a group of axes (as opposed to just one axis), nested gridspecs, etc. (Conversely, it doesn’t work at all w/ `plt.subplot` or `plt.subplot2grid` because each call to these functions makes their own gridspec, and we do the layout within individual gridspecs). I’m writing to appeal for some help testing this, or coming up with situations that I didn’t think about. There is one request for AnchoredOffsetBoxes, which I haven’t done yet, but I think that is a 0.2 feature once folks think the basic idea is OK. I’m also more than open to addressing any implementation concerns/suggestions. Right now, automatic installation only works with python 3.6 because we require kiwi-solver gitub master version for python 2.7. But you should be able to install with `pip install .` into a virtualenv. https://github.com/matplotlib/matplotlib/pull/9082 There is also a guide in `tutorials/intermediate/constrainedlayout_guide.py`. It probably still has some rough edges, but suggestions welcome. Thanks for any help. Cheers, Jody

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mpl_cairo manylinux wheel available
by Antony Lee Sept. 29, 2017

Sept. 29, 2017

Hi all, A manylinux wheel for mpl_cairo (https://github.com/anntzer/mpl_cairo) is now available (under GitHub releases). mpl_cairo is a new, cairo-based backend for Matplotlib, that offers several improvements over the current default, Agg-based backend. See the README on GitHub for more details :-) I would be interested in hearing your feedback. Antony

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Producing plots with objects
by Tune Kamae Sept. 28, 2017

Sept. 28, 2017

Hi, My knowledge on matplotlib is limited and may be using wrong terminology. However my goal is quite clear. What I don’t know is where to post my question. If this is not the right mailing list, please forgive me and suggest the right mailing list. My goal: 1) Make a plot with all elements accessible as objects like the one Excel produces. 2) Then by touching anywhere on screen (assuming Win10 with a touch screen), one will know how close is the touch location to a curve or the x-axis. 3) If such a plot can be put out, I can program for the blind students follow a line by producing sound. 4) They can follow any one of multiple curves in a plot and can feel what a sinusoidal curve is. I would greatly appreciate if someone can guide me along this direction. Tune Kamae Windows 10 版のメールから送信

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new committer
by Thomas Caswell Sept. 26, 2017

Sept. 26, 2017

Folks, Please welcome Jody Klymak (@jklymak on github) to the team! Tom

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v2.1 schedule
by Thomas Caswell Sept. 26, 2017

Sept. 26, 2017

Folks, We are currently waiting on 2 PR ( https://github.com/matplotlib/matplotlib/pull/9199 and https://github.com/matplotlib/matplotlib/pull/9068 ) and then I will cut 2.1 tonight. It will probably take a few more days to finish writing up the release notes and some final edits to the rst files. Tom

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Re: [Matplotlib-devel] [matplotlib-devel] Make matplotlib running on GPU/CUDA
by Francesco Faccenda Sept. 22, 2017

Sept. 22, 2017

Thank you Chris for your reply. I have to admit I already stumbled on VisPy while doing my research on the web. Still, I've got a lot of code already working with *matplotlib*. Indeed, not only I plot data with it, but i manage a lot of *mpl events* to provide the users usefool tools, like lines picking, tooltips, lines copy/paste, square selectors for multiple selections, context menu and so on. Moreover, I got matplotlib *embedded *on *wxpython *as well. While at the beginning few lines were managed and noone complained, now that big amout of data has to be displayed, the non-GPU core of the library is starting to show its limits. Since matplotlib is a reference library for this kind of applications, I thought it deserved an update in this direction. If anyone is willing to do so, I'm available to discuss possible solutions and also provide any help I can give. Best regards, Francesco Faccenda 2017-09-13 0:46 GMT+02:00 Chris Barker <chris.barker(a)noaa.gov>: > On Tue, Sep 12, 2017 at 8:47 AM, Francesco Faccenda < > f.faccenda86(a)gmail.com> wrote: > >> But there’s a good news, I have a nice GPU available (an NVIDIA Tesla >> K40c), so I’d like to know if there is a way to make matplotlib run on it, >> or maybe wrap it on some GPU/CUDA wrapper and make it run smoothly. >> > > I tihnk you want VisPy: > > https://vispy.readthedocs.io/en/latest/ > > It's a plotting package with a kinda like matplotlib API, built on OpenGL. > > Unfortunately, it doesn't look like it's been updated in a while -- from > teh docs. But the gitHub project is active: > > https://github.com/vispy/vispy > > So maybe it's only the docs that haven't been updated! > > But probably a much better option than trying to shoehorn GPU rendering > into MPL. > > The problem is that while MPL was designed to be "backend" independent -- > so it is "easy" to plug in an alternative renderer, the rendering model is > not really well suited to GPU rendering -- it would take a lot of > refactoring to really be able to take advantage of the graphics card. > > -CHB > > > -- > > Christopher Barker, Ph.D. > Oceanographer > > Emergency Response Division > NOAA/NOS/OR&R (206) 526-6959 voice > 7600 Sand Point Way NE > <https://maps.google.com/?q=7600+Sand+Point+Way+NE&entry=gmail&source=g> > (206) 526-6329 fax > Seattle, WA 98115 (206) 526-6317 main reception > > Chris.Barker(a)noaa.gov >

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Travis artifacts?
by Jody Klymak Sept. 21, 2017

Sept. 21, 2017

Hi all, Does Travis upload artifacts to amazon or some such? How do I access? I’m trying to see why I have a few image failures, and before I scrap the tests, I’d like to at least see what is going on. Thanks a lot, Jody

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Python 2.7 build failing due to Unicode characters...
by Jody Klymak Sept. 11, 2017

Sept. 11, 2017

Hi all, Very sorry to be ignorant, but my python 2.7 build of the [constrained_layout manager](https://github.com/matplotlib/matplotlib/pull/9082) is failing because the underlying functions don’t accept unicode strings. i.e. `boo(‘test’)` fails with a warning: `TypeError: Expected object of type `float, int, or long`. Got object of type unicode instead.` OK, the warning is a little confused - strings get converted to floats inside this fcn, but you get the idea… Am I supposed to put `# -*- coding: utf-8 -*-` at the top of every source that might create a string that calls these functions? Or should I convert the string somehow in my wrappers before passing down? Or does `from __future__ import unicode_literals` do this? Thanks for bearing with me, Jody

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