Mailman 3 November 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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Getting MultiCursor Subplots values (coordinates)
by A.Brahim Dec. 1, 2017

Dec. 1, 2017

I'm using this code to generate subplots with multiCursor crossing plots, and I want to get values (cursor coordinates) for all existing plots at the same time to show them in labels (on mouse motion). import numpy as np import matplotlib.pyplot as plt from matplotlib.widgets import MultiCursor t = np.arange(0.0, 2.0, 0.01) s1 = np.sin(2*np.pi*t) s2 = np.sin(4*np.pi*t) fig = plt.figure() ax1 = fig.add_subplot(211) ax1.plot(t, s1) ax2 = fig.add_subplot(212, sharex=ax1) ax2.plot(t, s2) multi = MultiCursor(fig.canvas, (ax1, ax2), color='r', lw=1) plt.show() <http://matplotlib.1069221.n5.nabble.com/file/t5115/U16Dl.png> -- Sent from: http://matplotlib.1069221.n5.nabble.com/matplotlib-devel-f28077.html

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2017-11-20 notes
by Thomas Caswell Nov. 28, 2017

Nov. 28, 2017

Folks, Notes from today's phone call. There are 3 things left for 2.1.1: categorical changes, 'fuzzy' images when mostly invalid, and the appevyor cleanup Tom Ryan May, Eric Firing, Thomas Caswell ** categorical - everyone on board with not sorting categorical values - everyone on board with only accepting strings as categories - some concern about supporting `np.nan` - if the first entry in `nan`, will miss units - do not want a python loop that chceks until it finds a not-nan - defer nan handling Tom's job to get all of the PRs collected an into one Plan going forward to support mixed types, missing data, and explicit ordering between categories: - write a category class - write a handler for pandas categorical ** Tom's pre-meeting notes *** do not sort values On one hand, sorting the values make sense as #+BEGIN_SRC python fig, (ax1, ax2) = plt.subplots(2, 1) ax1.scatter([1, 2], [1, 2]) ax2.scatter([2, 1], [2, 1]) #+END_SRC should produce visually identical plots so Tom thinks #+BEGIN_SRC python fig, (ax1, ax2) = plt.subplots(2, 1) ax1.scatter(['a', 'b'], [1, 2]) ax2.scatter(['b', 'a'], [2, 1]) #+END_SRC should as well (but Tom is wrong). On the other hand, user may expect that there is some semantics in the order they pass the data in in #+BEGIN_SRC python plt.bar(['first', 'second', 'third'], [1, 2, 3]) #+END_SRC and blindly sorting alphabetically gives them no escape hatch. practicality over purity, drop the sorting. *** supporting non-string values In the original implementation a cast through numpy was used which converted all non-string values to strings so things like #+BEGIN_SRC python plt.bar([1, 2, 'apple'], [1, 2, 3]) #+END_SRC would work. However this lead to the =2= and ='2'= being treated as the same (which seems less than great). Supporting them as different is possible, but is a fair bit of work because a number of places the unit framework assumes that 'plain' numbers will pass through un-changed. A more worrying concern is that #+BEGIN_SRC python x = [52, 32, 'a', 'b'] y = [0, 1, 2, 3] fig, (ax1, ax2) = plt.subplots() ax1.plot(x, y, 'o') ax2.plot(x[:2], y[:2], 'x') #+END_SRC in the first case the ints are treated as categoricals and in the second they are not. If we want to support mixed types like this then we need to make a special class (or use pandas categorical) which does not have to guess the type on the fly. requiring if the categorical unit handling is triggered, then all of the values must be string-like seems like the safest approach. *** support for nan Most of matptollib accepts `np.nan` as 'missing' data which is then dropped as part of the draw process. This makes less sense with `bar` but makes lots of sense with `scatter`. We should special-case allowing `np.nan` in as a 'string' and map it map it to it's self. *** special containers It was proposed to look for objects arrays as a marker for catagorical instead of the type of the data. Do not think we should do this as we try to be as agnostic about the container as possible everywhere else. ** appveyor - drop building conda package - remove conda recipe from the repo Ryan is taking care of this ** set_theta_grid(frac) - merged, improvement over current behavior, raising seems too aggressive ** #8947 - ringing with lots of nans this is Tom's job to investigate ** talked about traits / traitlets and friends ** major funding - get mplot3D 'right' - same interface - uses real 3D tools

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Strategy for 2.1.1 and 2.2
by Eric Firing Nov. 27, 2017

Nov. 27, 2017

All, There are outstanding bugs related to categoricals and to images, but fixes are not trivial and may involve code and behavior changes that go beyond what is ideal for a bug-fix release. Therefore I recommend that we release 2.1.1 based on what we have now, and try to get a 2.2 out soon after. Eric

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Weekly call re-scheduled
by Thomas Caswell Nov. 13, 2017

Nov. 13, 2017

Folks, We are going move the weekly call up an hour to 1400 Eastern. If anyone is interested in joining me know and I'll send you an gchat invitation. Tom

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2.1.0: trying to build documentation
by Andrey G. Grozin Nov. 9, 2017

Nov. 9, 2017

Hello *, running ./make.py in doc/ I got Traceback (most recent call last): File "./make.py", line 200, in <module> copy_if_out_of_date('../INSTALL.rst', 'users/installing.rst') File "./make.py", line 21, in copy_if_out_of_date shutil.copyfile(original, derived) File "/usr/lib/python2.7/shutil.py", line 96, in copyfile with open(src, 'rb') as fsrc: IOError: [Errno 2] No such file or directory: '../INSTALL.rst' Right, there's no ../INSTALL.rst. Removed the line copy_if_out_of_date('../INSTALL.rst', 'users/installing.rst') from make.py. Then I got Exception occurred: File "/usr/lib64/python2.7/site-packages/sphinx_gallery/gen_gallery.py", line 217, in generate_gallery_rst .format(examples_dir)) IOError: Main example directory /var/tmp/portage/dev-python/matplotlib-2.1.0/work/matplotlib-2.1.0-python2_7/doc/../tutorials does not have a README.txt file. Please write one to introduce your gallery. Right,there's no ../tutorials. make.py effectively calls python -msphinx . build/html -j1 -bhtml -dbuild/doctrees -Dplot_formats=png:100 -W which produces this error message. Removed all traces of tutorials from conf.py. Then I got Warning, treated as error: /var/tmp/portage/dev-python/matplotlib-2.1.0/work/matplotlib-2.1.0-python2_7/doc/users/index.rst:12:toctree contains reference to nonexisting document u'users/installing' Right, now there's no installing. Removed it from users/index.rst. Then I got some warning treated as an error about some docsttring in matplotlib. I don't want to edit matplotlib code, so I removed '-W' from options in the function html in make.py. Now building documentation proceeds rather far. But at the end I get copying static files... done copying extra files... done dumping search index in English (code: en) ... done dumping object inventory... done build succeeded, 63 warnings. Embedding documentation hyperlinks in examples ... gallery[ 0%] index.html gallery[ 0%] 2dcollections3d.html Exception occurred: File "/usr/lib64/python2.7/anydbm.py", line 85, in open return mod.open(file, flag, mode) error: (11, 'Resource temporarily unavailable') The full traceback has been saved in /var/tmp/portage/dev-python/matplotlib-2.1.0/temp/sphinx-err-KYVDSp.log, if you want to report the issue to the developers. And I don't know what to do next. The log file is: # Sphinx version: 1.6.3 # Python version: 2.7.14 (CPython) # Docutils version: 0.14 # Jinja2 version: 2.9.6 # Last messages: # copying extra files... # done # dumping search index in English (code: en) ... # done # dumping object inventory... # done # build succeeded, 63 warnings. # Embedding documentation hyperlinks in examples ... # gallery[ 0%] index.html # gallery[ 0%] 2dcollections3d.html # Loaded extensions: # sphinx.ext.inheritance_diagram (1.6.3) from /usr/lib64/python2.7/site-packages/sphinx/ext/inheritance_diagram.pyc # matplotlib.sphinxext.mathmpl (unknown version) from /var/tmp/portage/dev-python/matplotlib-2.1.0/work/matplotlib-2.1.0-python2_7/build/lib/matplotlib/sphinxext/mathmpl.py # matplotlib.sphinxext.only_directives (unknown version) from /var/tmp/portage/dev-python/matplotlib-2.1.0/work/matplotlib-2.1.0-python2_7/build/lib/matplotlib/sphinxext/only_directives.py # IPython.sphinxext.ipython_console_highlighting (unknown version) from /usr/lib64/python2.7/site-packages/IPython/sphinxext/ipython_console_highlighting.pyc # sphinx_gallery.gen_gallery (unknown version) from /usr/lib64/python2.7/site-packages/sphinx_gallery/gen_gallery.pyc # sphinx.ext.autodoc (1.6.3) from /usr/lib64/python2.7/site-packages/sphinx/ext/autodoc.pyc # sphinx.ext.intersphinx (1.6.3) from /usr/lib64/python2.7/site-packages/sphinx/ext/intersphinx.pyc # sphinx.ext.doctest (1.6.3) from /usr/lib64/python2.7/site-packages/sphinx/ext/doctest.pyc # matplotlib.sphinxext.plot_directive (unknown version) from /var/tmp/portage/dev-python/matplotlib-2.1.0/work/matplotlib-2.1.0-python2_7/build/lib/matplotlib/sphinxext/plot_directive.py # alabaster (0.7.10) from /usr/lib64/python2.7/site-packages/alabaster/__init__.pyc # IPython.sphinxext.ipython_directive (unknown version) from /usr/lib64/python2.7/site-packages/IPython/sphinxext/ipython_directive.pyc # sphinxext.math_symbol_table (unknown version) from sphinxext/math_symbol_table.py # sphinxext.github (unknown version) from sphinxext/github.py # sphinx.ext.graphviz (1.6.3) from /usr/lib64/python2.7/site-packages/sphinx/ext/graphviz.pyc # numpydoc (unknown version) from /usr/lib64/python2.7/site-packages/numpydoc/__init__.pyc # sphinx.ext.autosummary (1.6.3) from /usr/lib64/python2.7/site-packages/sphinx/ext/autosummary/__init__.pyc Traceback (most recent call last): File "/usr/lib64/python2.7/site-packages/sphinx/cmdline.py", line 306, in main app.build(opts.force_all, filenames) File "/usr/lib64/python2.7/site-packages/sphinx/application.py", line 357, in build self.emit('build-finished', None) File "/usr/lib64/python2.7/site-packages/sphinx/application.py", line 489, in emit return self.events.emit(event, self, *args) File "/usr/lib64/python2.7/site-packages/sphinx/events.py", line 79, in emit results.append(callback(*args)) File "/usr/lib64/python2.7/site-packages/sphinx_gallery/docs_resolv.py", line 455, in embed_code_links _embed_code_links(app, gallery_conf, gallery_dir) File "/usr/lib64/python2.7/site-packages/sphinx_gallery/docs_resolv.py", line 388, in _embed_code_links full_fname) File "/usr/lib64/python2.7/site-packages/sphinx_gallery/docs_resolv.py", line 306, in resolve link = self._get_link(cobj) File "/usr/lib64/python2.7/site-packages/sphinx_gallery/docs_resolv.py", line 258, in _get_link html = get_data(link, self.gallery_dir) File "/usr/lib64/python2.7/site-packages/sphinx_gallery/docs_resolv.py", line 67, in get_data search_index = shelve.open(cached_file) File "/usr/lib64/python2.7/shelve.py", line 243, in open return DbfilenameShelf(filename, flag, protocol, writeback) File "/usr/lib64/python2.7/shelve.py", line 227, in __init__ Shelf.__init__(self, anydbm.open(filename, flag), protocol, writeback) File "/usr/lib64/python2.7/anydbm.py", line 85, in open return mod.open(file, flag, mode) error: (11, 'Resource temporarily unavailable') Any ideas how to proceed? Does anybody check documentation generation before releases? Andrey

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Re: [Matplotlib-devel] feature request
by Antony Lee Nov. 2, 2017

Nov. 2, 2017

Hi, mplcursors should work just fine with a custom pyqt widget (I often write pyqt apps as well). To pin the bottom right text, e.g. the following works: from matplotlib import pyplot as plt import mplcursors fig, ax = plt.subplots() ax.plot([1, 2]) # By default, keep the status bar text cleared. fig.canvas.mpl_connect( "motion_notify_event", lambda event: fig.canvas.toolbar.set_message("")) # If the cursor matches, update the status bar text. mplcursors.cursor(hover=True).connect( "add", lambda sel: fig.canvas.toolbar.set_message( sel.annotation.get_text().replace("\n", " "))) plt.show() I will probably add a similar example to the mplcursors doc. Antony 2017-11-02 5:50 GMT-07:00 Rogier Delporte <rogier.delporte(a)gmail.com>: > Hi > > I had a quick look at mplcursors and it's very close to what I want. I'm > not sure I'll be able to use it in combination with a custom pyqt > matplotlib widget. > > I think it would be a very nice feature if this could be integrated right > into matplotlib in such a way that the cursor readout in the bottom right > corner snaps(of course it would be made optional) to the nearest data > point. Unfortunately, I'm too much of a noob to implement this myself, but > I'd like to request this feature be put on one of the todo-lists. > > Thanks for the great library! > > Rogier Delporte > > > > On Sat, Sep 30, 2017 at 8:45 AM, Rogier Delporte < > rogier.delporte(a)gmail.com> wrote: > >> Thanks, I'll check it out. >> >> Op 29 sep. 2017 11:35 p.m. schreef "Antony Lee" <antony.lee(a)berkeley.edu >> >: >> >> Hi, >>> You may also want to look at mplcursors's hover mode ( >>> https://mplcursors.readthedocs.io/en/latest/examples/hover. >>> html#sphx-glr-examples-hover-py). >>> Antony >>> >>> 2017-09-29 14:24 GMT-07:00 Jody Klymak <jklymak(a)uvic.ca>: >>> >>>> Hi Rogier, >>>> >>>> You can already do this by writing a format_coord function and setting >>>> ax.format_coord property of the axis with your data in it. >>>> >>>> http://matplotlib.org/examples/api/image_zcoord.html >>>> >>>> Cheers, Jody >>>> >>>> On 29 Sep 2017, at 6:57, Rogier Delporte wrote: >>>> >>>> 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 >>>> _______________________________________________ >>>> Matplotlib-devel mailing list >>>> Matplotlib-devel(a)python.org >>>> https://mail.python.org/mailman/listinfo/matplotlib-devel >>>> >>>> >>>> _______________________________________________ >>>> Matplotlib-devel mailing list >>>> Matplotlib-devel(a)python.org >>>> https://mail.python.org/mailman/listinfo/matplotlib-devel >>>> >>>> >>> >

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