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Cleanup axes_divider docstrings, and detail calculations. #20066

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Merged
dstansby merged 1 commit into from
Apr 25, 2021
Merged

Cleanup axes_divider docstrings, and detail calculations. #20066

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46 changes: 8 additions & 38 deletions lib/mpl_toolkits/axes_grid1/axes_divider.py
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Original file line number Diff line number Diff line change
Expand Up @@ -587,7 +587,6 @@ class HBoxDivider(SubplotDivider):
def _determine_karray(equivalent_sizes, appended_sizes,
max_equivalent_size,
total_appended_size):

n = len(equivalent_sizes)
eq_rs, eq_as = np.asarray(equivalent_sizes).T
ap_rs, ap_as = np.asarray(appended_sizes).T
Expand All @@ -598,12 +597,14 @@ def _determine_karray(equivalent_sizes, appended_sizes,
A[-1, :-1] = ap_rs
B[:n] = -eq_as
B[-1] = total_appended_size - sum(ap_as)

karray_H = np.linalg.solve(A, B) # A @ K = B
# A @ K = B: This solves for {k_0, ..., k_{N-1}, H} so that
# eq_r_i * k_i + eq_a_i = H for all i: all axes have the same height
# sum(ap_r_i * k_i + ap_a_i) = total_appended_size: fixed total width
# (foo_r_i * k_i + foo_a_i will end up being the size of foo.)
karray_H = np.linalg.solve(A, B)
karray = karray_H[:-1]
H = karray_H[-1]

if H > max_equivalent_size:
if H > max_equivalent_size: # Additionally, upper-bound the height.
karray = (max_equivalent_size - eq_as) / eq_rs
return karray

Expand All @@ -625,8 +626,6 @@ def new_locator(self, nx, nx1=None):
cell. When *nx1* is None, a single *nx*-th column is
specified. Otherwise location of columns spanning between *nx*
to *nx1* (but excluding *nx1*-th column) is specified.
ny, ny1 : int
Same as *nx* and *nx1*, but for row positions.
"""
return AxesLocator(self, nx, 0, nx1, None)

Expand Down Expand Up @@ -655,21 +654,7 @@ def _locate(self, x, y, w, h,
return x0, y0, ox, hh

def locate(self, nx, ny, nx1=None, ny1=None, axes=None, renderer=None):
"""
Parameters
----------
axes_divider : AxesDivider
nx, nx1 : int
Integers specifying the column-position of the
cell. When *nx1* is None, a single *nx*-th column is
specified. Otherwise location of columns spanning between *nx*
to *nx1* (but excluding *nx1*-th column) is specified.
ny, ny1 : int
Same as *nx* and *nx1*, but for row positions.
axes
renderer
"""

# docstring inherited
figW, figH = self._fig.get_size_inches()
x, y, w, h = self.get_position_runtime(axes, renderer)

Expand Down Expand Up @@ -707,27 +692,12 @@ def new_locator(self, ny, ny1=None):
return AxesLocator(self, 0, ny, None, ny1)

def locate(self, nx, ny, nx1=None, ny1=None, axes=None, renderer=None):
"""
Parameters
----------
axes_divider : AxesDivider
nx, nx1 : int
Integers specifying the column-position of the
cell. When *nx1* is None, a single *nx*-th column is
specified. Otherwise location of columns spanning between *nx*
to *nx1* (but excluding *nx1*-th column) is specified.
ny, ny1 : int
Same as *nx* and *nx1*, but for row positions.
axes
renderer
"""

# docstring inherited
figW, figH = self._fig.get_size_inches()
x, y, w, h = self.get_position_runtime(axes, renderer)

x_equivalent_sizes = self.get_horizontal_sizes(renderer)
y_appended_sizes = self.get_vertical_sizes(renderer)

y0, x0, oy, ww = self._locate(y, x, h, w,
x_equivalent_sizes, y_appended_sizes,
figH, figW)
Expand Down