8000 Allow `shared_yaxes` to work with secondary axes by gmjw · Pull Request #5180 · plotly/plotly.py · GitHub
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Allow shared_yaxes to work with secondary axes #5180

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Allow shared_yaxes to work with secondary axes #5180

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fd64e00
Fix sharing of secondary y-axis
May 12, 2025
8f0ac47
Add test
May 12, 2025
948bc38
black
May 12, 2025
dcc607c
black
May 12, 2025
7fd2702
Merge branch 'main' into secondary-y-shared
gvwilson Jun 26, 2025
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Fix sharing of secondary y-axis
  • Loading branch information
Gareth Williams committed May 12, 2025
commit fd64e0012fb2d6c2531d01504b8ac31fa3e7166d
37 changes: 26 additions & 11 deletions plotly/_subplots.py
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Original file line number Diff line number Diff line change
Expand Up @@ -754,8 +754,10 @@ def _check_hv_spacing(dimsize, spacing, name, dimvarname, dimname):
)
grid_ref[r][c] = subplot_refs

_configure_shared_axes(layout, grid_ref, specs, "x", shared_xaxes, row_dir)
_configure_shared_axes(layout, grid_ref, specs, "y", shared_yaxes, row_dir)
_configure_shared_axes(layout, grid_ref, specs, "x", shared_xaxes, row_dir, False)
_configure_shared_axes(layout, grid_ref, specs, "y", shared_yaxes, row_dir, False)
if secondary_y:
_configure_shared_axes(layout, grid_ref, specs, "y", shared_yaxes, row_dir, True)

# Build inset reference
# ---------------------
Expand Down Expand Up @@ -887,7 +889,7 @@ def _check_hv_spacing(dimsize, spacing, name, dimvarname, dimname):
return figure


def _configure_shared_axes(layout, grid_ref, specs, x_or_y, shared, row_dir):
def _configure_shared_axes(layout, grid_ref, specs, x_or_y, shared, row_dir, secondary_y):
rows = len(grid_ref)
cols = len(grid_ref[0])

Expand All @@ -898,6 +900,13 @@ def _configure_shared_axes(layout, grid_ref, specs, x_or_y, shared, row_dir):
else:
rows_iter = range(rows)

if secondary_y:
cols_iter = range(cols - 1, -1, -1)
axis_index = 1
else:
cols_iter = range(cols)
axis_index = 0

def update_axis_matches(first_axis_id, subplot_ref, spec, remove_label):
if subplot_ref is None:
return first_axis_id
Expand All @@ -921,13 +930,15 @@ def update_axis_matches(first_axis_id, subplot_ref, spec, remove_label):
return first_axis_id

if shared == "columns" or (x_or_y == "x" and shared is True):
for c in range(cols):
for c in cols_iter:
first_axis_id = None
ok_to_remove_label = x_or_y == "x"
for r in rows_iter:
if not grid_ref[r][c]:
continue
subplot_ref = grid_ref[r][c][0]
if axis_index >= len(grid_ref[r][c]):
continue
subplot_ref = grid_ref[r][c][axis_index]
spec = specs[r][c]
first_axis_id = update_axis_matches(
first_axis_id, subplot_ref, spec, ok_to_remove_label
Expand All @@ -937,26 +948,30 @@ def update_axis_matches(first_axis_id, subplot_ref, spec, remove_label):
for r in rows_iter:
first_axis_id = None
ok_to_remove_label = x_or_y == "y"
for c in range(cols):
for c in cols_iter:
if not grid_ref[r][c]:
continue
subplot_ref = grid_ref[r][c][0]
if axis_index >= len(grid_ref[r][c]):
continue
subplot_ref = grid_ref[r][c][axis_index]
spec = specs[r][c]
first_axis_id = update_axis_matches(
first_axis_id, subplot_ref, spec, ok_to_remove_label
)

elif shared == "all":
first_axis_id = None
for c in range(cols):
for ri, r in enumerate(rows_iter):
for ri, r in enumerate(rows_iter):
for c in cols_iter:
if not grid_ref[r][c]:
continue
subplot_ref = grid_ref[r][c][0]
if axis_index >= len(grid_ref[r][c]):
continue
subplot_ref = grid_ref[r][c][axis_index]
spec = specs[r][c]

if x_or_y == "y":
ok_to_remove_label = c > 0
ok_to_remove_label = c < cols - 1 if secondary_y else c > 0
else:
ok_to_remove_label = ri > 0 if row_dir > 0 else r < rows - 1

Expand Down
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