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"""
`matplotlib.figure` implements the following classes:
`Figure`
Top level `~matplotlib.artist.Artist`, which holds all plot elements.
Many methods are implemented in `FigureBase`.
`SubFigure`
A logical figure inside a figure, usually added to a figure (or parent
`SubFigure`) with `Figure.add_subfigure` or `Figure.subfigures` methods
(provisional API v3.4).
`SubplotParams`
Control the default spacing between subplots.
"""
from contextlib import ExitStack
import inspect
import logging
from numbers import Integral
import numpy as np
import matplotlib as mpl
from matplotlib import _blocking_input, docstring, projections
from matplotlib.artist import (
Artist, allow_rasterization, _finalize_rasterization)
from matplotlib.backend_bases import (
FigureCanvasBase, NonGuiException, MouseButton, _get_renderer)
import matplotlib._api as _api
import matplotlib.cbook as cbook
import matplotlib.colorbar as cbar
import matplotlib.image as mimage
from matplotlib.axes import Axes, SubplotBase, subplot_class_factory
from matplotlib.gridspec import GridSpec
import matplotlib.legend as mlegend
from matplotlib.patches import Rectangle
from matplotlib.text import Text
from matplotlib.transforms import (Affine2D, Bbox, BboxTransformTo,
TransformedBbox)
_log = logging.getLogger(__name__)
def _stale_figure_callback(self, val):
if self.figure:
self.figure.stale = val
class _AxesStack(cbook.Stack):
"""
Specialization of Stack, to handle all tracking of Axes in a Figure.
This stack stores ``ind, axes`` pairs, where ``ind`` is a serial index
tracking the order in which axes were added.
AxesStack is a callable; calling it returns the current axes.
"""
def __init__(self):
super().__init__()
self._ind = 0
def as_list(self):
"""
Return a list of the Axes instances that have been added to the figure.
"""
return [a for i, a in sorted(self._elements)]
def _entry_from_axes(self, e):
return next(((ind, a) for ind, a in self._elements if a == e), None)
def remove(self, a):
"""Remove the axes from the stack."""
super().remove(self._entry_from_axes(a))
def bubble(self, a):
"""
Move the given axes, which must already exist in the stack, to the top.
"""
return super().bubble(self._entry_from_axes(a))
def add(self, a):
"""
Add Axes *a* to the stack.
If *a* is already on the stack, don't add it again.
"""
# All the error checking may be unnecessary; but this method
# is called so seldom that the overhead is negligible.
_api.check_isinstance(Axes, a=a)
if a in self:
return
self._ind += 1
super().push((self._ind, a))
def __call__(self):
"""
Return the active axes.
If no axes exists on the stack, then returns None.
"""
if not len(self._elements):
return None
else:
index, axes = self._elements[self._pos]
return axes
def __contains__(self, a):
return a in self.as_list()
class SubplotParams:
"""
A class to hold the parameters for a subplot.
"""
def __init__(self, left=None, bottom=None, right=None, top=None,
wspace=None, hspace=None):
"""
Defaults are given by :rc:`figure.subplot.[name]`.
Parameters
----------
left : float
The position of the left edge of the subplots,
as a fraction of the figure width.
right : float
The position of the right edge of the subplots,
as a fraction of the figure width.
bottom : float
The position of the bottom edge of the subplots,
as a fraction of the figure height.
top : float
The position of the top edge of the subplots,
as a fraction of the figure height.
wspace : float
The width of the padding between subplots,
as a fraction of the average Axes width.
hspace : float
The height of the padding between subplots,
as a fraction of the average Axes height.
"""
self._validate = True
for key in ["left", "bottom", "right", "top", "wspace", "hspace"]:
setattr(self, key, mpl.rcParams[f"figure.subplot.{key}"])
self.update(left, bottom, right, top, wspace, hspace)
# Also remove _validate after deprecation elapses.
validate = _api.deprecate_privatize_attribute("3.5")
def update(self, left=None, bottom=None, right=None, top=None,
wspace=None, hspace=None):
"""
Update the dimensions of the passed parameters. *None* means unchanged.
"""
if self._validate:
if ((left if left is not None else self.left)
>= (right if right is not None else self.right)):
raise ValueError('left cannot be >= right')
if ((bottom if bottom is not None else self.bottom)
>= (top if top is not None else self.top)):
raise ValueError('bottom cannot be >= top')
if left is not None:
self.left = left
if right is not None:
self.right = right
if bottom is not None:
self.bottom = bottom
if top is not None:
self.top = top
if wspace is not None:
self.wspace = wspace
if hspace is not None:
self.hspace = hspace
class FigureBase(Artist):
"""
Base class for `.figure.Figure` and `.figure.SubFigure` containing the
methods that add artists to the figure or subfigure, create Axes, etc.
"""
def __init__(self, **kwargs):
super().__init__()
# remove the non-figure artist _axes property
# as it makes no sense for a figure to be _in_ an axes
# this is used by the property methods in the artist base class
# which are over-ridden in this class
del self._axes
self._suptitle = None
self._supxlabel = None
self._supylabel = None
# groupers to keep track of x and y labels we want to align.
# see self.align_xlabels and self.align_ylabels and
# axis._get_tick_boxes_siblings
self._align_label_groups = {"x": cbook.Grouper(), "y": cbook.Grouper()}
self.figure = self
# list of child gridspecs for this figure
self._gridspecs = []
self._localaxes = _AxesStack() # track all axes and current axes
self.artists = []
self.lines = []
self.patches = []
self.texts = []
self.images = []
self.legends = []
self.subfigs = []
self.stale = True
self.suppressComposite = None
self.set(**kwargs)
def _get_draw_artists(self, renderer):
"""Also runs apply_aspect"""
artists = self.get_children()
for sfig in self.subfigs:
artists.remove(sfig)
childa = sfig.get_children()
for child in childa:
if child in artists:
artists.remove(child)
artists.remove(self.patch)
artists = sorted(
(artist for artist in artists if not artist.get_animated()),
key=lambda artist: artist.get_zorder())
for ax in self._localaxes.as_list():
locator = ax.get_axes_locator()
if locator:
pos = locator(ax, renderer)
ax.apply_aspect(pos)
else:
ax.apply_aspect()
for child in ax.get_children():
if hasattr(child, 'apply_aspect'):
locator = child.get_axes_locator()
if locator:
pos = locator(child, renderer)
child.apply_aspect(pos)
else:
child.apply_aspect()
return artists
def autofmt_xdate(
self, bottom=0.2, rotation=30, ha='right', which='major'):
"""
Date ticklabels often overlap, so it is useful to rotate them
and right align them. Also, a common use case is a number of
subplots with shared x-axis where the x-axis is date data. The
ticklabels are often long, and it helps to rotate them on the
bottom subplot and turn them off on other subplots, as well as
turn off xlabels.
Parameters
----------
bottom : float, default: 0.2
The bottom of the subplots for `subplots_adjust`.
rotation : float, default: 30 degrees
The rotation angle of the xtick labels in degrees.
ha : {'left', 'center', 'right'}, default: 'right'
The horizontal alignment of the xticklabels.
which : {'major', 'minor', 'both'}, default: 'major'
Selects which ticklabels to rotate.
"""
_api.check_in_list(['major', 'minor', 'both'], which=which)
allsubplots = all(hasattr(ax, 'get_subplotspec') for ax in self.axes)
if len(self.axes) == 1:
for label in self.axes[0].get_xticklabels(which=which):
label.set_ha(ha)
label.set_rotation(rotation)
else:
if allsubplots:
for ax in self.get_axes():
if ax.get_subplotspec().is_last_row():
for label in ax.get_xticklabels(which=which):
label.set_ha(ha)
label.set_rotation(rotation)
else:
for label in ax.get_xticklabels(which=which):
label.set_visible(False)
ax.set_xlabel('')
if allsubplots:
self.subplots_adjust(bottom=bottom)
self.stale = True
def get_children(self):
"""Get a list of artists contained in the figure."""
return [self.patch,
*self.artists,
*self._localaxes.as_list(),
*self.lines,
*self.patches,
*self.texts,
*self.images,
*self.legends,
*self.subfigs]
def contains(self, mouseevent):
"""
Test whether the mouse event occurred on the figure.
Returns
-------
bool, {}
"""
inside, info = self._default_contains(mouseevent, figure=self)
if inside is not None:
return inside, info
inside = self.bbox.contains(mouseevent.x, mouseevent.y)
return inside, {}
def get_window_extent(self, *args, **kwargs):
"""
Return the figure bounding box in display space. Arguments are ignored.
"""
return self.bbox
def _suplabels(self, t, info, **kwargs):
"""
Add a centered %(name)s to the figure.
Parameters
----------
t : str
The %(name)s text.
x : float, default: %(x0)s
The x location of the text in figure coordinates.
y : float, default: %(y0)s
The y location of the text in figure coordinates.
horizontalalignment, ha : {'center', 'left', 'right'}, default: %(ha)s
The horizontal alignment of the text relative to (*x*, *y*).
verticalalignment, va : {'top', 'center', 'bottom', 'baseline'}, \
default: %(va)s
The vertical alignment of the text relative to (*x*, *y*).
fontsize, size : default: :rc:`figure.titlesize`
The font size of the text. See `.Text.set_size` for possible
values.
fontweight, weight : default: :rc:`figure.titleweight`
The font weight of the text. See `.Text.set_weight` for possible
values.
Returns
-------
text
The `.Text` instance of the %(name)s.
Other Parameters
----------------
fontproperties : None or dict, optional
A dict of font properties. If *fontproperties* is given the
default values for font size and weight are taken from the
`.FontProperties` defaults. :rc:`figure.titlesize` and
:rc:`figure.titleweight` are ignored in this case.
**kwargs
Additional kwargs are `matplotlib.text.Text` properties.
"""
suplab = getattr(self, info['name'])
x = kwargs.pop('x', None)
y = kwargs.pop('y', None)
if info['name'] in ['_supxlabel', '_suptitle']:
autopos = y is None
elif info['name'] == '_supylabel':
autopos = x is None
if x is None:
x = info['x0']
if y is None:
y = info['y0']
if 'horizontalalignment' not in kwargs and 'ha' not in kwargs:
kwargs['horizontalalignment'] = info['ha']
if 'verticalalignment' not in kwargs and 'va' not in kwargs:
kwargs['verticalalignment'] = info['va']
if 'rotation' not in kwargs:
kwargs['rotation'] = info['rotation']
if 'fontproperties' not in kwargs:
if 'fontsize' not in kwargs and 'size' not in kwargs:
kwargs['size'] = mpl.rcParams['figure.titlesize']
if 'fontweight' not in kwargs and 'weight' not in kwargs:
kwargs['weight'] = mpl.rcParams['figure.titleweight']
sup = self.text(x, y, t, **kwargs)
if suplab is not None:
suplab.set_text(t)
suplab.set_position((x, y))
suplab.update_from(sup)
sup.remove()
else:
suplab = sup
suplab._autopos = autopos
setattr(self, info['name'], suplab)
self.stale = True
return suplab
@docstring.Substitution(x0=0.5, y0=0.98, name='suptitle', ha='center',
va='top')
@docstring.copy(_suplabels)
def suptitle(self, t, **kwargs):
# docstring from _suplabels...
info = {'name': '_suptitle', 'x0': 0.5, 'y0': 0.98,
'ha': 'center', 'va': 'top', 'rotation': 0}
return self._suplabels(t, info, **kwargs)
@docstring.Substitution(x0=0.5, y0=0.01, name='supxlabel', ha='center',
va='bottom')
@docstring.copy(_suplabels)
def supxlabel(self, t, **kwargs):
# docstring from _suplabels...
info = {'name': '_supxlabel', 'x0': 0.5, 'y0': 0.01,
'ha': 'center', 'va': 'bottom', 'rotation': 0}
return self._suplabels(t, info, **kwargs)
@docstring.Substitution(x0=0.02, y0=0.5, name='supylabel', ha='left',
va='center')
@docstring.copy(_suplabels)
def supylabel(self, t, **kwargs):
# docstring from _suplabels...
info = {'name': '_supylabel', 'x0': 0.02, 'y0': 0.5,
'ha': 'left', 'va': 'center', 'rotation': 'vertical',
'rotation_mode': 'anchor'}
return self._suplabels(t, info, **kwargs)
def get_edgecolor(self):
"""Get the edge color of the Figure rectangle."""
return self.patch.get_edgecolor()
def get_facecolor(self):
"""Get the face color of the Figure rectangle."""
return self.patch.get_facecolor()
def get_frameon(self):
"""
Return the figure's background patch visibility, i.e.
whether the figure background will be drawn. Equivalent to
``Figure.patch.get_visible()``.
"""
return self.patch.get_visible()
def set_linewidth(self, linewidth):
"""
Set the line width of the Figure rectangle.
Parameters
----------
linewidth : number
"""
self.patch.set_linewidth(linewidth)
def get_linewidth(self):
"""
Get the line width of the Figure rectangle.
"""
return self.patch.get_linewidth()
def set_edgecolor(self, color):
"""
Set the edge color of the Figure rectangle.
Parameters
----------
color : color
"""
self.patch.set_edgecolor(color)
def set_facecolor(self, color):
"""
Set the face color of the Figure rectangle.
Parameters
----------
color : color
"""
self.patch.set_facecolor(color)
def set_frameon(self, b):
"""
Set the figure's background patch visibility, i.e.
whether the figure background will be drawn. Equivalent to
``Figure.patch.set_visible()``.
Parameters
----------
b : bool
"""
self.patch.set_visible(b)
self.stale = True
frameon = property(get_frameon, set_frameon)
def add_artist(self, artist, clip=False):
"""
Add an `.Artist` to the figure.
Usually artists are added to Axes objects using `.Axes.add_artist`;
this method can be used in the rare cases where one needs to add
artists directly to the figure instead.
Parameters
----------
artist : `~matplotlib.artist.Artist`
The artist to add to the figure. If the added artist has no
transform previously set, its transform will be set to
``figure.transSubfigure``.
clip : bool, default: False
Whether the added artist should be clipped by the figure patch.
Returns
-------
`~matplotlib.artist.Artist`
The added artist.
"""
artist.set_figure(self)
self.artists.append(artist)
artist._remove_method = self.artists.remove
if not artist.is_transform_set():
artist.set_transform(self.transSubfigure)
if clip:
artist.set_clip_path(self.patch)
self.stale = True
return artist
@docstring.dedent_interpd
def add_axes(self, *args, **kwargs):
"""
Add an Axes to the figure.
Call signatures::
add_axes(rect, projection=None, polar=False, **kwargs)
add_axes(ax)
Parameters
----------
rect : sequence of float
The dimensions [left, bottom, width, height] of the new Axes. All
quantities are in fractions of figure width and height.
projection : {None, 'aitoff', 'hammer', 'lambert', 'mollweide', \
'polar', 'rectilinear', str}, optional
The projection type of the `~.axes.Axes`. *str* is the name of
a custom projection, see `~matplotlib.projections`. The default
None results in a 'rectilinear' projection.
polar : bool, default: False
If True, equivalent to projection='polar'.
axes_class : subclass type of `~.axes.Axes`, optional
The `.axes.Axes` subclass that is instantiated. This parameter
is incompatible with *projection* and *polar*. See
:ref:`axisartist_users-guide-index` for examples.
sharex, sharey : `~.axes.Axes`, optional
Share the x or y `~matplotlib.axis` with sharex and/or sharey.
The axis will have the same limits, ticks, and scale as the axis
of the shared axes.
label : str
A label for the returned Axes.
Returns
-------
`~.axes.Axes`, or a subclass of `~.axes.Axes`
The returned axes class depends on the projection used. It is
`~.axes.Axes` if rectilinear projection is used and
`.projections.polar.PolarAxes` if polar projection is used.
Other Parameters
----------------
**kwargs
This method also takes the keyword arguments for
the returned Axes class. The keyword arguments for the
rectilinear Axes class `~.axes.Axes` can be found in
the following table but there might also be other keyword
arguments if another projection is used, see the actual Axes
class.
%(Axes:kwdoc)s
Notes
-----
In rare circumstances, `.add_axes` may be called with a single
argument, an Axes instance already created in the present figure but
not in the figure's list of Axes.
See Also
--------
.Figure.add_subplot
.pyplot.subplot
.pyplot.axes
.Figure.subplots
.pyplot.subplots
Examples
--------
Some simple examples::
rect = l, b, w, h
fig = plt.figure()
fig.add_axes(rect)
fig.add_axes(rect, frameon=False, facecolor='g')
fig.add_axes(rect, polar=True)
ax = fig.add_axes(rect, projection='polar')
fig.delaxes(ax)
fig.add_axes(ax)
"""
if not len(args) and 'rect' not in kwargs:
raise TypeError(
"add_axes() missing 1 required positional argument: 'rect'")
elif 'rect' in kwargs:
if len(args):
raise TypeError(
"add_axes() got multiple values for argument 'rect'")
args = (kwargs.pop('rect'), )
if isinstance(args[0], Axes):
a = args[0]
key = a._projection_init
if a.get_figure() is not self:
raise ValueError(
"The Axes must have been created in the present figure")
else:
rect = args[0]
if not np.isfinite(rect).all():
raise ValueError('all entries in rect must be finite '
'not {}'.format(rect))
projection_class, pkw = self._process_projection_requirements(
*args, **kwargs)
# create the new axes using the axes class given
a = projection_class(self, rect, **pkw)
key = (projection_class, pkw)
return self._add_axes_internal(a, key)
@docstring.dedent_interpd
def add_subplot(self, *args, **kwargs):
"""
Add an `~.axes.Axes` to the figure as part of a subplot arrangement.
Call signatures::
add_subplot(nrows, ncols, index, **kwargs)
add_subplot(pos, **kwargs)
add_subplot(ax)
add_subplot()
Parameters
----------
*args : int, (int, int, *index*), or `.SubplotSpec`, default: (1, 1, 1)
The position of the subplot described by one of
- Three integers (*nrows*, *ncols*, *index*). The subplot will
take the *index* position on a grid with *nrows* rows and
*ncols* columns. *index* starts at 1 in the upper left corner
and increases to the right. *index* can also be a two-tuple
specifying the (*first*, *last*) indices (1-based, and including
*last*) of the subplot, e.g., ``fig.add_subplot(3, 1, (1, 2))``
makes a subplot that spans the upper 2/3 of the figure.
- A 3-digit integer. The digits are interpreted as if given
separately as three single-digit integers, i.e.
``fig.add_subplot(235)`` is the same as
``fig.add_subplot(2, 3, 5)``. Note that this can only be used
if there are no more than 9 subplots.
- A `.SubplotSpec`.
In rare circumstances, `.add_subplot` may be called with a single
argument, a subplot Axes instance already created in the
present figure but not in the figure's list of Axes.
projection : {None, 'aitoff', 'hammer', 'lambert', 'mollweide', \
'polar', 'rectilinear', str}, optional
The projection type of the subplot (`~.axes.Axes`). *str* is the
name of a custom projection, see `~matplotlib.projections`. The
default None results in a 'rectilinear' projection.
polar : bool, default: False
If True, equivalent to projection='polar'.
axes_class : subclass type of `~.axes.Axes`, optional
The `.axes.Axes` subclass that is instantiated. This parameter
is incompatible with *projection* and *polar*. See
:ref:`axisartist_users-guide-index` for examples.
sharex, sharey : `~.axes.Axes`, optional
Share the x or y `~matplotlib.axis` with sharex and/or sharey.
The axis will have the same limits, ticks, and scale as the axis
of the shared axes.
label : str
A label for the returned Axes.
Returns
-------
`.axes.SubplotBase`, or another subclass of `~.axes.Axes`
The Axes of the subplot. The returned Axes base class depends on
the projection used. It is `~.axes.Axes` if rectilinear projection
is used and `.projections.polar.PolarAxes` if polar projection
is used. The returned Axes is then a subplot subclass of the
base class.
Other Parameters
----------------
**kwargs
This method also takes the keyword arguments for the returned Axes
base class; except for the *figure* argument. The keyword arguments
for the rectilinear base class `~.axes.Axes` can be found in
the following table but there might also be other keyword
arguments if another projection is used.
%(Axes:kwdoc)s
See Also
--------
.Figure.add_axes
.pyplot.subplot
.pyplot.axes
.Figure.subplots
.pyplot.subplots
Examples
--------
::
fig = plt.figure()
fig.add_subplot(231)
ax1 = fig.add_subplot(2, 3, 1) # equivalent but more general
fig.add_subplot(232, frameon=False) # subplot with no frame
fig.add_subplot(233, projection='polar') # polar subplot
fig.add_subplot(234, sharex=ax1) # subplot sharing x-axis with ax1
fig.add_subplot(235, facecolor="red") # red subplot
ax1.remove() # delete ax1 from the figure
fig.add_subplot(ax1) # add ax1 back to the figure
"""
if 'figure' in kwargs:
# Axes itself allows for a 'figure' kwarg, but since we want to
# bind the created Axes to self, it is not allowed here.
raise TypeError(
"add_subplot() got an unexpected keyword argument 'figure'")
if len(args) == 1 and isinstance(args[0], SubplotBase):
ax = args[0]
key = ax._projection_init
if ax.get_figure() is not self:
raise ValueError("The Subplot must have been created in "
"the present figure")
else:
if not args:
args = (1, 1, 1)
# Normalize correct ijk values to (i, j, k) here so that
# add_subplot(211) == add_subplot(2, 1, 1). Invalid values will
# trigger errors later (via SubplotSpec._from_subplot_args).
if (len(args) == 1 and isinstance(args[0], Integral)
and 100 <= args[0] <= 999):
args = tuple(map(int, str(args[0])))
projection_class, pkw = self._process_projection_requirements(
*args, **kwargs)
ax = subplot_class_factory(projection_class)(self, *args, **pkw)
key = (projection_class, pkw)
return self._add_axes_internal(ax, key)
def _add_axes_internal(self, ax, key):
"""Private helper for `add_axes` and `add_subplot`."""
self._axstack.add(ax)
self._localaxes.add(ax)
self.sca(ax)
ax._remove_method = self.delaxes
# this is to support plt.subplot's re-selection logic
ax._projection_init = key
self.stale = True
ax.stale_callback = _stale_figure_callback
return ax
def subplots(self, nrows=1, ncols=1, *, sharex=False, sharey=False,
squeeze=True, subplot_kw=None, gridspec_kw=None):
"""
Add a set of subplots to this figure.
This utility wrapper makes it convenient to create common layouts of
subplots in a single call.
Parameters
----------
nrows, ncols : int, default: 1
Number of rows/columns of the subplot grid.
sharex, sharey : bool or {'none', 'all', 'row', 'col'}, default: False
Controls sharing of x-axis (*sharex*) or y-axis (*sharey*):
- True or 'all': x- or y-axis will be shared among all subplots.
- False or 'none': each subplot x- or y-axis will be independent.
- 'row': each subplot row will share an x- or y-axis.
- 'col': each subplot column will share an x- or y-axis.
When subplots have a shared x-axis along a column, only the x tick
labels of the bottom subplot are created. Similarly, when subplots
have a shared y-axis along a row, only the y tick labels of the
first column subplot are created. To later turn other subplots'
ticklabels on, use `~matplotlib.axes.Axes.tick_params`.
When subplots have a shared axis that has units, calling
`.Axis.set_units` will update each axis with the new units.
squeeze : bool, default: True
- If True, extra dimensions are squeezed out from the returned
array of Axes:
- if only one subplot is constructed (nrows=ncols=1), the
resulting single Axes object is returned as a scalar.
- for Nx1 or 1xM subplots, the returned object is a 1D numpy
object array of Axes objects.
- for NxM, subplots with N>1 and M>1 are returned as a 2D array.
- If False, no squeezing at all is done: the returned Axes object
is always a 2D array containing Axes instances, even if it ends
up being 1x1.
subplot_kw : dict, optional
Dict with keywords passed to the `.Figure.add_subplot` call used to
create each subplot.
gridspec_kw : dict, optional
Dict with keywords passed to the
`~matplotlib.gridspec.GridSpec` constructor used to create
the grid the subplots are placed on.
Returns
-------
`~.axes.Axes` or array of Axes
Either a single `~matplotlib.axes.Axes` object or an array of Axes
objects if more than one subplot was created. The dimensions of the
resulting array can be controlled with the *squeeze* keyword, see
above.
See Also
--------
.pyplot.subplots
.Figure.add_subplot
.pyplot.subplot
Examples
--------
::
# First create some toy data:
x = np.linspace(0, 2*np.pi, 400)
y = np.sin(x**2)
# Create a figure
plt.figure()
# Create a subplot
ax = fig.subplots()
ax.plot(x, y)
ax.set_title('Simple plot')
# Create two subplots and unpack the output array immediately
ax1, ax2 = fig.subplots(1, 2, sharey=True)
ax1.plot(x, y)
ax1.set_title('Sharing Y axis')
ax2.scatter(x, y)
# Create four polar Axes and access them through the returned array
axes = fig.subplots(2, 2, subplot_kw=dict(projection='polar'))
axes[0, 0].plot(x, y)
axes[1, 1].scatter(x, y)
# Share a X axis with each column of subplots
fig.subplots(2, 2, sharex='col')
# Share a Y axis with each row of subplots
fig.subplots(2, 2, sharey='row')
# Share both X and Y axes with all subplots
fig.subplots(2, 2, sharex='all', sharey='all')
# Note that this is the same as
fig.subplots(2, 2, sharex=True, sharey=True)
"""
if gridspec_kw is None:
gridspec_kw = {}
gs = self.add_gridspec(nrows, ncols, figure=self, **gridspec_kw)
axs = gs.subplots(sharex=sharex, sharey=sharey, squeeze=squeeze,
subplot_kw=subplot_kw)
return axs
def delaxes(self, ax):
"""
Remove the `~.axes.Axes` *ax* from the figure; update the current Axes.
"""
def _reset_locators_and_formatters(axis):
# Set the formatters and locators to be associated with axis
# (where previously they may have been associated with another
# Axis instance)
axis.get_major_formatter().set_axis(axis)
axis.get_major_locator().set_axis(axis)
axis.get_minor_formatter().set_axis(axis)
axis.get_minor_locator().set_axis(axis)
def _break_share_link(ax, grouper):
siblings = grouper.get_siblings(ax)
if len(siblings) > 1:
grouper.remove(ax)
for last_ax in siblings:
if ax is not last_ax:
return last_ax
return None
self._axstack.remove(ax)
self._axobservers.process("_axes_change_event", self)
self.stale = True
self._localaxes.remove(ax)
# Break link between any shared axes
for name in ax._axis_names:
last_ax = _break_share_link(ax, ax._shared_axes[name])
if last_ax is not None:
_reset_locators_and_formatters(getattr(last_ax, f"{name}axis"))
# Break link between any twinned axes
_break_share_link(ax, ax._twinned_axes)
# Note: in the docstring below, the newlines in the examples after the
# calls to legend() allow replacing it with figlegend() to generate the
# docstring of pyplot.figlegend.
@docstring.dedent_interpd
def legend(self, *args, **kwargs):
"""
Place a legend on the figure.
Call signatures::
legend()
legend(handles, labels)
legend(handles=handles)
legend(labels)
The call signatures correspond to the following different ways to use
this method:
**1. Automatic detection of elements to be shown in the legend**
The elements to be added to the legend are automatically determined,
when you do not pass in any extra arguments.
In this case, the labels are taken from the artist. You can specify
them either at artist creation or by calling the
:meth:`~.Artist.set_label` method on the artist::
ax.plot([1, 2, 3], label='Inline label')
fig.legend()
or::
line, = ax.plot([1, 2, 3])
line.set_label('Label via method')
fig.legend()
Specific lines can be excluded from the automatic legend element
selection by defining a label starting with an underscore.
This is default for all artists, so calling `.Figure.legend` without
any arguments and without setting the labels manually will result in
no legend being drawn.
**2. Explicitly listing the artists and labels in the legend**
For full control of which artists have a legend entry, it is possible
to pass an iterable of legend artists followed by an iterable of
legend labels respectively::
fig.legend([line1, line2, line3], ['label1', 'label2', 'label3'])
**3. Explicitly listing the artists in the legend**
This is similar to 2, but the labels are taken from the artists'
label properties. Example::
line1, = ax1.plot([1, 2, 3], label='label1')
line2, = ax2.plot([1, 2, 3], label='label2')
fig.legend(handles=[line1, line2])