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Improve tick density near zero for SymmetricalLogLocator #31381

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saitejaponnam12 wants to merge 3 commits into from
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Improve tick density near zero for SymmetricalLogLocator #31381

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9d65110
Improve tick density near zero for SymmetricalLogLocator
saitejaponnam12 Mar 25, 2026
95dd61f
Respect numticks budget when adding linear ticks to SymmetricalLogLoc…
saitejaponnam12 Mar 25, 2026
be860f7
Fix linting: line length, indentation, and code style
saitejaponnam12 Mar 25, 2026
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23 changes: 23 additions & 0 deletions lib/matplotlib/ticker.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2706,6 +2706,29 @@ def get_log_range(lo, hi):
else:
ticklocs = decades

# Add ticks with linear spacing in the linear region for better
# density near zero.
if has_b:
if self.numticks is None:
n_linear = 3
elif self.numticks <= 0:
n_linear = 0
else:
n_linear = min(5, self.numticks)

if n_linear > 0:
linear_vmin = max(vmin, -linthresh)
linear_vmax = min(vmax, linthresh)

if linear_vmax > linear_vmin:
linear_ticks = np.linspace(
linear_vmin, linear_vmax, n_linear
)
all_ticks = np.concatenate(
[np.asarray(ticklocs), linear_ticks]
)
ticklocs = np.sort(np.unique(all_ticks))

return self.raise_if_exceeds(np.array(ticklocs))

def view_limits(self, vmin, vmax):
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