You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
409 lines
14 KiB
Python
409 lines
14 KiB
Python
5 years ago
|
import numpy as np
|
||
|
|
|
||
|
|
import matplotlib.cbook as cbook
|
||
|
|
import matplotlib.docstring as docstring
|
||
|
|
import matplotlib.ticker as mticker
|
||
|
|
import matplotlib.transforms as mtransforms
|
||
|
|
from matplotlib.axes._base import _AxesBase
|
||
|
|
|
||
|
|
|
||
|
|
def _make_secondary_locator(rect, parent):
|
||
|
|
"""
|
||
|
|
Helper function to locate the secondary axes.
|
||
|
|
|
||
|
|
A locator gets used in `Axes.set_aspect` to override the default
|
||
|
|
locations... It is a function that takes an axes object and
|
||
|
|
a renderer and tells `set_aspect` where it is to be placed.
|
||
|
|
|
||
|
|
This locator make the transform be in axes-relative co-coordinates
|
||
|
|
because that is how we specify the "location" of the secondary axes.
|
||
|
|
|
||
|
|
Here *rect* is a rectangle [l, b, w, h] that specifies the
|
||
|
|
location for the axes in the transform given by *trans* on the
|
||
|
|
*parent*.
|
||
|
|
"""
|
||
|
|
_rect = mtransforms.Bbox.from_bounds(*rect)
|
||
|
|
def secondary_locator(ax, renderer):
|
||
|
|
# delay evaluating transform until draw time because the
|
||
|
|
# parent transform may have changed (i.e. if window reesized)
|
||
|
|
bb = mtransforms.TransformedBbox(_rect, parent.transAxes)
|
||
|
|
tr = parent.figure.transFigure.inverted()
|
||
|
|
bb = mtransforms.TransformedBbox(bb, tr)
|
||
|
|
return bb
|
||
|
|
|
||
|
|
return secondary_locator
|
||
|
|
|
||
|
|
|
||
|
|
class SecondaryAxis(_AxesBase):
|
||
|
|
"""
|
||
|
|
General class to hold a Secondary_X/Yaxis.
|
||
|
|
"""
|
||
|
|
|
||
|
|
def __init__(self, parent, orientation,
|
||
|
|
location, functions, **kwargs):
|
||
|
|
"""
|
||
|
|
See `.secondary_xaxis` and `.secondary_yaxis` for the doc string.
|
||
|
|
While there is no need for this to be private, it should really be
|
||
|
|
called by those higher level functions.
|
||
|
|
"""
|
||
|
|
|
||
|
|
self._functions = functions
|
||
|
|
self._parent = parent
|
||
|
|
self._orientation = orientation
|
||
|
|
self._ticks_set = False
|
||
|
|
|
||
|
|
if self._orientation == 'x':
|
||
|
|
super().__init__(self._parent.figure, [0, 1., 1, 0.0001], **kwargs)
|
||
|
|
self._axis = self.xaxis
|
||
|
|
self._locstrings = ['top', 'bottom']
|
||
|
|
self._otherstrings = ['left', 'right']
|
||
|
|
elif self._orientation == 'y':
|
||
|
|
super().__init__(self._parent.figure, [0, 1., 0.0001, 1], **kwargs)
|
||
|
|
self._axis = self.yaxis
|
||
|
|
self._locstrings = ['right', 'left']
|
||
|
|
self._otherstrings = ['top', 'bottom']
|
||
|
|
self._parentscale = self._axis.get_scale()
|
||
|
|
# this gets positioned w/o constrained_layout so exclude:
|
||
|
|
self._layoutbox = None
|
||
|
|
self._poslayoutbox = None
|
||
|
|
|
||
|
|
self.set_location(location)
|
||
|
|
self.set_functions(functions)
|
||
|
|
|
||
|
|
# styling:
|
||
|
|
if self._orientation == 'x':
|
||
|
|
otheraxis = self.yaxis
|
||
|
|
else:
|
||
|
|
otheraxis = self.xaxis
|
||
|
|
|
||
|
|
otheraxis.set_major_locator(mticker.NullLocator())
|
||
|
|
otheraxis.set_ticks_position('none')
|
||
|
|
|
||
|
|
for st in self._otherstrings:
|
||
|
|
self.spines[st].set_visible(False)
|
||
|
|
for st in self._locstrings:
|
||
|
|
self.spines[st].set_visible(True)
|
||
|
|
|
||
|
|
if self._pos < 0.5:
|
||
|
|
# flip the location strings...
|
||
|
|
self._locstrings = self._locstrings[::-1]
|
||
|
|
self.set_alignment(self._locstrings[0])
|
||
|
|
|
||
|
|
def set_alignment(self, align):
|
||
|
|
"""
|
||
|
|
Set if axes spine and labels are drawn at top or bottom (or left/right)
|
||
|
|
of the axes.
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
align : str
|
||
|
|
either 'top' or 'bottom' for orientation='x' or
|
||
|
|
'left' or 'right' for orientation='y' axis.
|
||
|
|
"""
|
||
|
|
if align in self._locstrings:
|
||
|
|
if align == self._locstrings[1]:
|
||
|
|
# need to change the orientation.
|
||
|
|
self._locstrings = self._locstrings[::-1]
|
||
|
|
elif align != self._locstrings[0]:
|
||
|
|
raise ValueError('"{}" is not a valid axis orientation, '
|
||
|
|
'not changing the orientation;'
|
||
|
|
'choose "{}" or "{}""'.format(align,
|
||
|
|
self._locstrings[0], self._locstrings[1]))
|
||
|
|
self.spines[self._locstrings[0]].set_visible(True)
|
||
|
|
self.spines[self._locstrings[1]].set_visible(False)
|
||
|
|
self._axis.set_ticks_position(align)
|
||
|
|
self._axis.set_label_position(align)
|
||
|
|
|
||
|
|
def set_location(self, location):
|
||
|
|
"""
|
||
|
|
Set the vertical or horizontal location of the axes in
|
||
|
|
parent-normalized co-ordinates.
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
location : {'top', 'bottom', 'left', 'right'} or float
|
||
|
|
The position to put the secondary axis. Strings can be 'top' or
|
||
|
|
'bottom' for orientation='x' and 'right' or 'left' for
|
||
|
|
orientation='y'. A float indicates the relative position on the
|
||
|
|
parent axes to put the new axes, 0.0 being the bottom (or left)
|
||
|
|
and 1.0 being the top (or right).
|
||
|
|
"""
|
||
|
|
|
||
|
|
# This puts the rectangle into figure-relative coordinates.
|
||
|
|
if isinstance(location, str):
|
||
|
|
if location in ['top', 'right']:
|
||
|
|
self._pos = 1.
|
||
|
|
elif location in ['bottom', 'left']:
|
||
|
|
self._pos = 0.
|
||
|
|
else:
|
||
|
|
raise ValueError("location must be '{}', '{}', or a "
|
||
|
|
"float, not '{}'".format(location,
|
||
|
|
self._locstrings[0], self._locstrings[1]))
|
||
|
|
else:
|
||
|
|
self._pos = location
|
||
|
|
self._loc = location
|
||
|
|
|
||
|
|
if self._orientation == 'x':
|
||
|
|
bounds = [0, self._pos, 1., 1e-10]
|
||
|
|
else:
|
||
|
|
bounds = [self._pos, 0, 1e-10, 1]
|
||
|
|
|
||
|
|
secondary_locator = _make_secondary_locator(bounds, self._parent)
|
||
|
|
|
||
|
|
# this locator lets the axes move in the parent axes coordinates.
|
||
|
|
# so it never needs to know where the parent is explicitly in
|
||
|
|
# figure co-ordinates.
|
||
|
|
# it gets called in `ax.apply_aspect() (of all places)
|
||
|
|
self.set_axes_locator(secondary_locator)
|
||
|
|
|
||
|
|
def apply_aspect(self, position=None):
|
||
|
|
# docstring inherited.
|
||
|
|
self._set_lims()
|
||
|
|
super().apply_aspect(position)
|
||
|
|
|
||
|
|
@cbook._make_keyword_only("3.2", "minor")
|
||
|
|
def set_ticks(self, ticks, minor=False):
|
||
|
|
"""
|
||
|
|
Set the x ticks with list of *ticks*
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
ticks : list
|
||
|
|
List of x-axis tick locations.
|
||
|
|
minor : bool, optional
|
||
|
|
If ``False`` sets major ticks, if ``True`` sets minor ticks.
|
||
|
|
Default is ``False``.
|
||
|
|
"""
|
||
|
|
ret = self._axis.set_ticks(ticks, minor=minor)
|
||
|
|
self.stale = True
|
||
|
|
self._ticks_set = True
|
||
|
|
return ret
|
||
|
|
|
||
|
|
def set_functions(self, functions):
|
||
|
|
"""
|
||
|
|
Set how the secondary axis converts limits from the parent axes.
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
functions : 2-tuple of func, or `Transform` with an inverse.
|
||
|
|
Transform between the parent axis values and the secondary axis
|
||
|
|
values.
|
||
|
|
|
||
|
|
If supplied as a 2-tuple of functions, the first function is
|
||
|
|
the forward transform function and the second is the inverse
|
||
|
|
transform.
|
||
|
|
|
||
|
|
If a transform is supplied, then the transform must have an
|
||
|
|
inverse.
|
||
|
|
"""
|
||
|
|
|
||
|
|
if self._orientation == 'x':
|
||
|
|
set_scale = self.set_xscale
|
||
|
|
parent_scale = self._parent.get_xscale()
|
||
|
|
else:
|
||
|
|
set_scale = self.set_yscale
|
||
|
|
parent_scale = self._parent.get_yscale()
|
||
|
|
# we need to use a modified scale so the scale can receive the
|
||
|
|
# transform. Only types supported are linear and log10 for now.
|
||
|
|
# Probably possible to add other transforms as a todo...
|
||
|
|
if parent_scale == 'log':
|
||
|
|
defscale = 'functionlog'
|
||
|
|
else:
|
||
|
|
defscale = 'function'
|
||
|
|
|
||
|
|
if (isinstance(functions, tuple) and len(functions) == 2 and
|
||
|
|
callable(functions[0]) and callable(functions[1])):
|
||
|
|
# make an arbitrary convert from a two-tuple of functions
|
||
|
|
# forward and inverse.
|
||
|
|
self._functions = functions
|
||
|
|
elif functions is None:
|
||
|
|
self._functions = (lambda x: x, lambda x: x)
|
||
|
|
else:
|
||
|
|
raise ValueError('functions argument of secondary axes '
|
||
|
|
'must be a two-tuple of callable functions '
|
||
|
|
'with the first function being the transform '
|
||
|
|
'and the second being the inverse')
|
||
|
|
# need to invert the roles here for the ticks to line up.
|
||
|
|
set_scale(defscale, functions=self._functions[::-1])
|
||
|
|
|
||
|
|
def draw(self, renderer=None, inframe=False):
|
||
|
|
"""
|
||
|
|
Draw the secondary axes.
|
||
|
|
|
||
|
|
Consults the parent axes for its limits and converts them
|
||
|
|
using the converter specified by
|
||
|
|
`~.axes._secondary_axes.set_functions` (or *functions*
|
||
|
|
parameter when axes initialized.)
|
||
|
|
"""
|
||
|
|
self._set_lims()
|
||
|
|
# this sets the scale in case the parent has set its scale.
|
||
|
|
self._set_scale()
|
||
|
|
super().draw(renderer=renderer, inframe=inframe)
|
||
|
|
|
||
|
|
def _set_scale(self):
|
||
|
|
"""
|
||
|
|
Check if parent has set its scale
|
||
|
|
"""
|
||
|
|
|
||
|
|
if self._orientation == 'x':
|
||
|
|
pscale = self._parent.xaxis.get_scale()
|
||
|
|
set_scale = self.set_xscale
|
||
|
|
if self._orientation == 'y':
|
||
|
|
pscale = self._parent.yaxis.get_scale()
|
||
|
|
set_scale = self.set_yscale
|
||
|
|
if pscale == self._parentscale:
|
||
|
|
return
|
||
|
|
else:
|
||
|
|
self._parentscale = pscale
|
||
|
|
|
||
|
|
if pscale == 'log':
|
||
|
|
defscale = 'functionlog'
|
||
|
|
else:
|
||
|
|
defscale = 'function'
|
||
|
|
|
||
|
|
if self._ticks_set:
|
||
|
|
ticks = self._axis.get_ticklocs()
|
||
|
|
|
||
|
|
# need to invert the roles here for the ticks to line up.
|
||
|
|
set_scale(defscale, functions=self._functions[::-1])
|
||
|
|
|
||
|
|
# OK, set_scale sets the locators, but if we've called
|
||
|
|
# axsecond.set_ticks, we want to keep those.
|
||
|
|
if self._ticks_set:
|
||
|
|
self._axis.set_major_locator(mticker.FixedLocator(ticks))
|
||
|
|
|
||
|
|
def _set_lims(self):
|
||
|
|
"""
|
||
|
|
Set the limits based on parent limits and the convert method
|
||
|
|
between the parent and this secondary axes.
|
||
|
|
"""
|
||
|
|
if self._orientation == 'x':
|
||
|
|
lims = self._parent.get_xlim()
|
||
|
|
set_lim = self.set_xlim
|
||
|
|
if self._orientation == 'y':
|
||
|
|
lims = self._parent.get_ylim()
|
||
|
|
set_lim = self.set_ylim
|
||
|
|
order = lims[0] < lims[1]
|
||
|
|
lims = self._functions[0](np.array(lims))
|
||
|
|
neworder = lims[0] < lims[1]
|
||
|
|
if neworder != order:
|
||
|
|
# Flip because the transform will take care of the flipping.
|
||
|
|
lims = lims[::-1]
|
||
|
|
set_lim(lims)
|
||
|
|
|
||
|
|
def set_aspect(self, *args, **kwargs):
|
||
|
|
"""
|
||
|
|
Secondary axes cannot set the aspect ratio, so calling this just
|
||
|
|
sets a warning.
|
||
|
|
"""
|
||
|
|
cbook._warn_external("Secondary axes can't set the aspect ratio")
|
||
|
|
|
||
|
|
def set_xlabel(self, xlabel, fontdict=None, labelpad=None, **kwargs):
|
||
|
|
"""
|
||
|
|
Set the label for the x-axis.
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
xlabel : str
|
||
|
|
The label text.
|
||
|
|
|
||
|
|
labelpad : scalar, optional, default: None
|
||
|
|
Spacing in points between the label and the x-axis.
|
||
|
|
|
||
|
|
Other Parameters
|
||
|
|
----------------
|
||
|
|
**kwargs : `.Text` properties
|
||
|
|
`.Text` properties control the appearance of the label.
|
||
|
|
|
||
|
|
See also
|
||
|
|
--------
|
||
|
|
text : for information on how override and the optional args work
|
||
|
|
"""
|
||
|
|
if labelpad is not None:
|
||
|
|
self.xaxis.labelpad = labelpad
|
||
|
|
return self.xaxis.set_label_text(xlabel, fontdict, **kwargs)
|
||
|
|
|
||
|
|
def set_ylabel(self, ylabel, fontdict=None, labelpad=None, **kwargs):
|
||
|
|
"""
|
||
|
|
Set the label for the x-axis.
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
ylabel : str
|
||
|
|
The label text.
|
||
|
|
|
||
|
|
labelpad : scalar, optional, default: None
|
||
|
|
Spacing in points between the label and the x-axis.
|
||
|
|
|
||
|
|
Other Parameters
|
||
|
|
----------------
|
||
|
|
**kwargs : `.Text` properties
|
||
|
|
`.Text` properties control the appearance of the label.
|
||
|
|
|
||
|
|
See also
|
||
|
|
--------
|
||
|
|
text : for information on how override and the optional args work
|
||
|
|
"""
|
||
|
|
if labelpad is not None:
|
||
|
|
self.yaxis.labelpad = labelpad
|
||
|
|
return self.yaxis.set_label_text(ylabel, fontdict, **kwargs)
|
||
|
|
|
||
|
|
def set_color(self, color):
|
||
|
|
"""
|
||
|
|
Change the color of the secondary axes and all decorators.
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
color : Matplotlib color
|
||
|
|
"""
|
||
|
|
if self._orientation == 'x':
|
||
|
|
self.tick_params(axis='x', colors=color)
|
||
|
|
self.spines['bottom'].set_color(color)
|
||
|
|
self.spines['top'].set_color(color)
|
||
|
|
self.xaxis.label.set_color(color)
|
||
|
|
else:
|
||
|
|
self.tick_params(axis='y', colors=color)
|
||
|
|
self.spines['left'].set_color(color)
|
||
|
|
self.spines['right'].set_color(color)
|
||
|
|
self.yaxis.label.set_color(color)
|
||
|
|
|
||
|
|
|
||
|
|
_secax_docstring = '''
|
||
|
|
Warnings
|
||
|
|
--------
|
||
|
|
This method is experimental as of 3.1, and the API may change.
|
||
|
|
|
||
|
|
Parameters
|
||
|
|
----------
|
||
|
|
location : {'top', 'bottom', 'left', 'right'} or float
|
||
|
|
The position to put the secondary axis. Strings can be 'top' or
|
||
|
|
'bottom' for orientation='x' and 'right' or 'left' for
|
||
|
|
orientation='y'. A float indicates the relative position on the
|
||
|
|
parent axes to put the new axes, 0.0 being the bottom (or left)
|
||
|
|
and 1.0 being the top (or right).
|
||
|
|
|
||
|
|
functions : 2-tuple of func, or Transform with an inverse
|
||
|
|
|
||
|
|
If a 2-tuple of functions, the user specifies the transform
|
||
|
|
function and its inverse. i.e.
|
||
|
|
`functions=(lambda x: 2 / x, lambda x: 2 / x)` would be an
|
||
|
|
reciprocal transform with a factor of 2.
|
||
|
|
|
||
|
|
The user can also directly supply a subclass of
|
||
|
|
`.transforms.Transform` so long as it has an inverse.
|
||
|
|
|
||
|
|
See :doc:`/gallery/subplots_axes_and_figures/secondary_axis`
|
||
|
|
for examples of making these conversions.
|
||
|
|
|
||
|
|
|
||
|
|
Other Parameters
|
||
|
|
----------------
|
||
|
|
**kwargs : `~matplotlib.axes.Axes` properties.
|
||
|
|
Other miscellaneous axes parameters.
|
||
|
|
|
||
|
|
Returns
|
||
|
|
-------
|
||
|
|
ax : axes._secondary_axes.SecondaryAxis
|
||
|
|
'''
|
||
|
|
docstring.interpd.update(_secax_docstring=_secax_docstring)
|