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pyplot plot raises ValueError when plotting NaN against datetime dates #14034

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c-johan-s opened this issue Apr 25, 2019 · 1 comment
Closed

pyplot plot raises ValueError when plotting NaN against datetime dates #14034

c-johan-s opened this issue Apr 25, 2019 · 1 comment
Milestone
v3.1.0

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@c-johan-s
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Bug report

Bug summary

Plotting a series of NaN normally works fine, like : plt.plot([1,2],[np.nan, np.nan]). But if instead plotted against a list of datetime date objects, like plt.plot([datetime.date(2019,1,1), datetime.date(2019,1,2)], [np.nan, np.nan]) a ValueError is raised with a message that I did not find intuitive.

Code for reproduction

import matplotlib.pyplot as plt
import datetime
import numpy as np
plt.plot([datetime.date(2019,1,1), datetime.date(2019,1,2)], [np.nan, np.nan])

Actual outcome

Out[8]: [<matplotlib.lines.Line2D at 0x25eacabbc18>]
Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\tkinter\__init__.py", line 1705, in __call__
    return self.func(*args)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\tkinter\__init__.py", line 749, in callit
    func(*args)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\backends\_backend_tk.py", line 346, in idle_draw
    self.draw()
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\backends\backend_tkagg.py", line 9, in draw
    super(FigureCanvasTkAgg, self).draw()
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\backends\backend_agg.py", line 402, in draw
    self.figure.draw(self.renderer)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\artist.py", line 50, in draw_wrapper
    return draw(artist, renderer, *args, **kwargs)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\figure.py", line 1649, in draw
    renderer, self, artists, self.suppressComposite)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\image.py", line 138, in _draw_list_compositing_images
    a.draw(renderer)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\artist.py", line 50, in draw_wrapper
    return draw(artist, renderer, *args, **kwargs)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\axes\_base.py", line 2610, in draw
    mimage._draw_list_compositing_images(renderer, self, artists)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\image.py", line 138, in _draw_list_compositing_images
    a.draw(renderer)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\artist.py", line 50, in draw_wrapper
    return draw(artist, renderer, *args, **kwargs)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\axis.py", line 1185, in draw
    ticks_to_draw = self._update_ticks(renderer)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\axis.py", line 1023, in _update_ticks
    tick_tups = list(self.iter_ticks())  # iter_ticks calls the locator
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\axis.py", line 967, in iter_ticks
    majorLocs = self.major.locator()
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\dates.py", line 1230, in __call__
    self.refresh()
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\dates.py", line 1250, in refresh
    dmin, dmax = self.viewlim_to_dt()
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\dates.py", line 1001, in viewlim_to_dt
    .format(vmin))
ValueError: view limit minimum -0.001 is less than 1 and is an invalid Matplotlib date value. This often happens if you pass a non-datetime value to an axis that has datetime units
Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\tkinter\__init__.py", line 1705, in __call__
    return self.func(*args)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\backends\_backend_tk.py", line 267, in resize
    self.draw()
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\backends\backend_tkagg.py", line 9, in draw
    super(FigureCanvasTkAgg, self).draw()
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\backends\backend_agg.py", line 402, in draw
    self.figure.draw(self.renderer)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\artist.py", line 50, in draw_wrapper
    return draw(artist, renderer, *args, **kwargs)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\figure.py", line 1649, in draw
    renderer, self, artists, self.suppressComposite)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\image.py", line 138, in _draw_list_compositing_images
    a.draw(renderer)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\artist.py", line 50, in draw_wrapper
    return draw(artist, renderer, *args, **kwargs)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\axes\_base.py", line 2610, in draw
    mimage._draw_list_compositing_images(renderer, self, artists)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\image.py", line 138, in _draw_list_compositing_images
    a.draw(renderer)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\artist.py", line 50, in draw_wrapper
    return draw(artist, renderer, *args, **kwargs)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\axis.py", line 1185, in draw
    ticks_to_draw = self._update_ticks(renderer)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\axis.py", line 1023, in _update_ticks
    tick_tups = list(self.iter_ticks())  # iter_ticks calls the locator
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\axis.py", line 967, in iter_ticks
    majorLocs = self.major.locator()
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\dates.py", line 1230, in __call__
    self.refresh()
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\dates.py", line 1250, in refresh
    dmin, dmax = self.viewlim_to_dt()
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\dates.py", line 1001, in viewlim_to_dt
    .format(vmin))
ValueError: view limit minimum -0.001 is less than 1 and is an invalid Matplotlib date value. This often happens if you pass a non-datetime value to an axis that has datetime units
Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\tkinter\__init__.py", line 1705, in __call__
    return self.func(*args)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\tkinter\__init__.py", line 749, in callit
    func(*args)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\backends\_backend_tk.py", line 346, in idle_draw
    self.draw()
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\backends\backend_tkagg.py", line 9, in draw
    super(FigureCanvasTkAgg, self).draw()
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\backends\backend_agg.py", line 402, in draw
    self.figure.draw(self.renderer)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\artist.py", line 50, in draw_wrapper
    return draw(artist, renderer, *args, **kwargs)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\figure.py", line 1649, in draw
    renderer, self, artists, self.suppressComposite)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\image.py", line 138, in _draw_list_compositing_images
    a.draw(renderer)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\artist.py", line 50, in draw_wrapper
    return draw(artist, renderer, *args, **kwargs)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\axes\_base.py", line 2610, in draw
    mimage._draw_list_compositing_images(renderer, self, artists)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\image.py", line 138, in _draw_list_compositing_images
    a.draw(renderer)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\artist.py", line 50, in draw_wrapper
    return draw(artist, renderer, *args, **kwargs)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\axis.py", line 1185, in draw
    ticks_to_draw = self._update_ticks(renderer)
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\axis.py", line 1023, in _update_ticks
    tick_tups = list(self.iter_ticks())  # iter_ticks calls the locator
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\axis.py", line 967, in iter_ticks
    majorLocs = self.major.locator()
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\dates.py", line 1230, in __call__
    self.refresh()
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\dates.py", line 1250, in refresh
    dmin, dmax = self.viewlim_to_dt()
  File "C:\Python\WinPython\WPy-3710\python-3.7.1.amd64\lib\site-packages\matplotlib\dates.py", line 1001, in viewlim_to_dt
    .format(vmin))
ValueError: view limit minimum -0.001 is less than 1 and is an invalid Matplotlib date value. This often happens if you pass a non-datetime value to an axis that has datetime units

Expected outcome
I would expect this to work in a similar way as if I would have run:

plt.plot([1, 2], [np.nan, np.nan])

Matplotlib version

  • Operating system: Windows 10
  • Matplotlib version: 3.0.1
  • Matplotlib backend (print(matplotlib.get_backend())): TkAgg
  • Python version: 3.7.1
  • Jupyter version (if applicable):
  • Other libraries:
@dstansby
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It looks like this is working fine on the current up to date master branch, so is definitely going to be fixed in 3.1 which should be released soon.

@dstansby dstansby added this to the v3.1.0 milestone Apr 25, 2019
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@dstansby @c-johan-s