Bug summary

Sometimes, LogLocator draws fewer ticks than it can due to less than optimal log stride selection.

Code for reproduction

from pylab import *

# At this figure size there's room for two y ticks
# (check with ax.yaxis.get_tick_space())
# which could be placed e.g. at 10^0 and 10^4,
# but only one tick is drawn at 10^2.
figure(figsize=(5, 1)).add_subplot(yscale="log", ylim=(.5, 15000))

Actual outcome

See comment above.

Expected outcome

See comment above.

Additional information

I suspect that the formulas for stride and decades in LogLocator.tick_values() are faulty.

Operating system

any

Matplotlib Version

3.11.0.dev511+g0b7a88a967

Matplotlib Backend

any

Python version

3.13

Jupyter version

no

Installation

git checkout