Description
Bug summary
When using imshow to display a numpy array filled with identical negative values hovering the mouse over the displayed image throws math domain errors.
Code for reproduction
import matplotlib.pyplot as plt
import numpy as np
test = np.full((2, 1), -1)
plt.imshow(test)
plt.show()Actual outcome
Hovering the mouse over the plot spews math domain errors into console and stops the value and coordinate under the mouse from being displayed in the top right.
Traceback (most recent call last):
File "C:\Users\{User}\miniconda3\envs\cv2\lib\site-packages\matplotlib\cbook\__init__.py", line 287, in process
func(*args, **kwargs)
File "C:\Users\{User}\miniconda3\envs\cv2\lib\site-packages\matplotlib\backend_bases.py", line 3061, in mouse_move
s = self._mouse_event_to_message(event)
File "C:\Users\{User}\miniconda3\envs\cv2\lib\site-packages\matplotlib\backend_bases.py", line 3053, in _mouse_event_to_message
data_str = a.format_cursor_data(data).rstrip()
File "C:\Users\{User}\miniconda3\envs\cv2\lib\site-packages\matplotlib\artist.py", line 1285, in format_cursor_data
g_sig_digits = cbook._g_sig_digits(data, delta)
File "C:\Users\{User}\miniconda3\envs\cv2\lib\site-packages\matplotlib\cbook\__init__.py", line 2228, in _g_sig_digits
- math.floor(math.log10(delta))) if math.isfinite(value) else 0
ValueError: math domain error
The coordinates and values in the top right of the window are missing.
Expected outcome
The value area should be displayed correctly.
Additional information
Perhaps the delta in cbook\__init__.py", line 2228, in _g_sig_digits - math.floor(math.log10(delta))) if math.isfinite(value) else 0 is negative in this case.
The errors do not occur if a single value in the array is different(negativ or positive doesn't matter).
i.e.
import matplotlib.pyplot as plt
import numpy as np
test = np.full((2, 1), -1)
test[0][0] = 0
plt.imshow(test)
plt.show()
Will not error.
The errors also do not occur if set_clim() is used.
Operating system
Windows 10 19044.1645
Matplotlib Version
3.5.1
Matplotlib Backend
QtAgg
Python version
Python 3.9.12
Jupyter version
No response
Installation
conda