# -*- coding: utf-8 -*-
"""Plot Templates module - contains classes that style plots produced by :class:`.Data`."""
__all__ = [
"TexFormatter",
"TexEngFormatter",
"DefaultPlotStyle",
"GBPlotStyle",
"JTBPlotStyle",
"JTBinsetStyle",
"PRBPlotStyle",
"SketchPlot",
"SeabornPlotStyle",
]
from os.path import join, dirname, realpath, exists
from inspect import getfile
from collections.abc import MutableMapping, Mapping
import matplotlib.pyplot as plt
from matplotlib.ticker import EngFormatter, Formatter
from matplotlib.ticker import AutoLocator
from mpl_toolkits.mplot3d import Axes3D
import numpy as np
from numpy.random import normal
try:
import seaborn as sns
SEABORN = True
except ImportError:
SEABORN = False
def _round(value, offset=2):
"""Round numbers for the TexFormatters to avoid crazy numbers of decimal places."""
for i in range(5):
vt = np.round(value, i)
if np.abs(value - vt) < 10 ** (-i - offset):
value = vt
break
return value
def _add_dots(key):
"""Replace __ with . in key."""
return key.replace("__", ".").replace("..", "__")
def _remove_dots(key):
return key.replace(".", "__")
[docs]class DefaultPlotStyle(MutableMapping):
"""Produces a default plot style.
To produce alternative plot styles, create subclasses of this plot. Either override or
create additional attributes to define rc Parameters (see Matplotlib documentation for
available rc parameters) and override the :py:meth:Stoner.pot.formats.DefaultPlotStyle.customise`
method to carry out additional plot formatting.
Attributes:
fig_width_pt (float): Preferred width of plot in points
show_xlabel (bool): Show the title in the plot
show_ylabel (bool): Show the x-axis Labels
show_zlabel (bool): show the y-xaxis labels
show_title (bool): show the title
show_legend (bool): show the legend
stylename (string): Name of the matplotlib style to use
stylesheet (list): Calculated list of stylesheets found by traversing the class hierarchy
Example
.. plot:: samples/plotstyles/default.py
:include-source:
:outname: defaultstyle
"""
# Internal class attributes.
_inches_per_pt = 1.0 / 72.27 # Convert pt to inch
_mm_per_inch = 25.4
_golden_mean = (np.sqrt(5) - 1.0) / 2.0 # Aesthetic ratio
# Settings for this figure type. All instance attributes which start template_
# will be used. Once the leading template_ is stripped, all _ characters are replaced
# with . and then the attributes are mapped to a dictionary and used to update the rcParams
# dictionary
# pylint: disable=attribute-defined-outside-init
show_xlabel = True
show_ylabel = True
show_zlabel = True
show_title = True
show_legend = True
xformatter = TexEngFormatter
yformatter = TexEngFormatter
zformatter = TexEngFormatter
xlocater = AutoLocator
ylocater = AutoLocator
zlocater = AutoLocator
stylename = "default"
subplot_settings = {
"panels": {
"xlabel": (False, False, True),
"ylabel": (True, True, True),
"zlabel": (False, False, False),
"title": (True, False, False),
},
"subplots": {
"xlabel": (True, True, True),
"ylabel": (True, True, True),
"zlabel": (False, False, False),
"title": (True, True, True),
},
"y2": {
"xlabel": (True, False, False),
"ylabel": (True, True, True),
"zlabel": (False, False, False),
"title": (True, False, False),
},
}
def __init__(self, *args, **kargs):
"""Create a template instance of this template.
Keyword arguments may be supplied to set default parameters. Any Matplotlib rc parameter
may be specified, with .'s replaced with __. A Mapping type object may be supplied as the first argument
which will be used to upodate the rcParams first.
"""
self._stylesheet = None
# self.fig_width = None
# self.fig_height = None
self.update(**kargs)
[docs] def __call__(self, **kargs):
"""Call the template object can manipulate the rcParams that will be set."""
for k, v in kargs.items():
if k.startswith("template_"):
nk = _add_dots(k[:9])
if nk in plt.rcParams:
super().__setattr__(nk, v)
self[nk] = v
else:
self.update({_add_dots(k): v})
def __delitem__(self, name):
"""Clear any setting that overrides the default for *name*."""
if hasattr(self, name):
default = getattr(type(self)(), name)
setattr(self, name, default)
elif name in plt.rcParams:
params = dict(plt.rcParams)
del params[name]
plt.rcdefaults()
plt.rcParams.update(params)
super().__delattr__(_remove_dots(f"template_{name}"))
else:
raise KeyError(f"{name} is not recognised as part of the template")
def __getattr__(self, name):
"""Provide magic to read certain attributes of the template."""
if name.startswith("template_"): # Magic conversion to rcParams
attrname = _add_dots(name[9:])
if attrname in plt.rcParams:
return plt.rcParams[attrname]
raise AttributeError("template attribute not in rcParams")
if name == "showlegend":
return self.show_legend and len(plt.gca().get_legend_handles_labels()[1]) > 1
return super().__getattribute__(name)
def __getitem__(self, name):
"""Try to match *name* to a style setting."""
try:
return self.__getattr__(name)
except AttributeError:
pass
if name in plt.rcParams:
return plt.rcParams[name]
raise KeyError(f"{name} is not recognised as part of the template")
def __iter__(self):
"""Iterate over stylesjeet settings."""
attrs = [x for x in dir(self) if self._allowed_attr(x)]
attrs += list(plt.rcParams.keys())
attrs.sort()
for f in attrs:
yield f
def __len__(self):
"""Implement a length of stylesheet."""
i = len([x for x in dir(self) if self._allowed_attr(x)])
i += len(list(plt.rcParams.keys()))
return i
def __setattr__(self, name, value):
"""Ensure stylesheet can't be overwritten and provide magic for template attributes."""
if name.startswith("template_"):
attrname = _add_dots(name[9:])
plt.rcParams[attrname] = value
super().__setattr__(name, value)
else:
super().__setattr__(name, value)
def __setitem__(self, name, value):
"""Set a stylesheet setting by *name*."""
if hasattr(self, name):
setattr(self, name, value)
else:
if name in plt.rcParams:
plt.rcParams[name] = value
name = _remove_dots(f"template_{name}")
super().__setattr__(name, value)
else:
raise KeyError(f"{name} is not recognised as part of the template")
def _allowed_attr(self, x, template=False):
"""Private method to test if this is a template attribute we can set."""
return (
not x.startswith("_")
and (not template) ^ x.startswith("template_")
and not callable(x)
and not isinstance(getattr(type(self), x, None), property)
)
@property
def stylesheet(self):
"""Horribly hacky method to traverse over the class hierarchy for style sheet names."""
if (
self._stylesheet is not None and self._stylesheet[0] == self.stylename
): # Have we cached a copy of our stylesheets ?
return self._stylesheet[1]
levels = type.mro(type(self))[:-1]
sheets = []
classes = []
for c in levels: # Iterate through all possible parent classes and build a list of stylesheets
if c is type(self) or c in classes or not isinstance(c, DefaultPlotStyle):
continue
for f in [
join(realpath(dirname(getfile(c))), c.stylename + ".mplstyle"),
join(dirname(realpath(getfile(c))), "stylelib", c.stylename + ".mplstyle"),
join(dirname(realpath(__file__)), "stylelib", c.stylename + ".mplstyle"),
]: # Look in first of all the same directory as the class file and then in a stylib folder
if exists(f):
sheets.append(f)
break
else: # Fallback, does the parent class define a builtin stylesheet ?
if c.stylename in plt.style.available:
sheets.append(c.stylename)
classes.append(c) # Stop double visiting files
# Now do the same for this class, but allow the stylename to be an instance variable as well
for f in [
join(dirname(realpath(getfile(type(self)))), self.stylename + ".mplstyle"),
join(dirname(realpath(getfile(type(self)))), "stylelib", self.stylename + ".mplstyle"),
]:
if exists(f):
sheets.append(f)
break
else:
if self.stylename in plt.style.available:
sheets.append(self.stylename)
self._stylesheet = self.stylename, sheets
return sheets
@stylesheet.setter
def stylesheet(self, value): # pylint: disable=r0201
"""Just stop the stylesheet from being set."""
raise AttributeError("Can't set the stylesheet value, this is derived from the stylename aatribute.")
[docs] def clear(self):
"""Reset everything back o defaults."""
attrs = [x for x in dir(self) if self._allowed_attr(x)]
defaults = type(self)()
for attr in attrs:
setattr(self, attr, getattr(defaults, attr))
plt.rcdefaults()
attrs = [x for x in dir(self) if self._allowed_attr(x, template=True)]
for attr in attrs:
delattr(self, attr)
[docs] def update(self, *args, **kargs): # pylint: disable=signature-differs
"""Update the template with new attributes from keyword arguments.
Up to one positional argument may be supplied
Keyword arguments may be supplied to set default parameters. Any Matplotlib rc parameter
may be specified, with .'s replaced with _ and )_ replaced with __.
"""
if len(args) == 1 and isinstance(args[0], Mapping):
super().update(args[0])
elif len(args) > 0:
raise SyntaxError(
"Only one posotional argument which should be a Mapping subclass can be supplied toi update."
)
for k in kargs:
if k in dir(self) and not callable(self.__getattr__(k)):
self.__setattr__(k, kargs[k])
elif not k.startswith("_"):
self.__setattr__("template_" + k, kargs[k])
[docs] def apply(self):
"""Update matplotlib rc parameters from any attributes starting template_."""
plt.style.use(self.stylesheet)
for attr in dir(self):
v = getattr(self, attr)
if not attr.startswith("template_"):
continue
attr = _add_dots(attr[9:])
if attr in plt.rcParams:
plt.rcParams[attr] = v
self.customise()
[docs] def customise(self):
"""Implement hook to customise plot.
This method is supplied for sub classes to override to provide additional
plot customisation after the rc parameters are updated from the class and
instance attributes."""
[docs] def customise_axes(self, ax, plot):
"""Implement hook for for when we have an axis to manipulate.
Args:
ax (matplotlib axes):
The axes to be modified by this function.
Note:
In the DefaultPlotStyle class this method is used to set SI units
plotting mode for all axes.
"""
ax.xaxis.set_major_locator(self.xlocater())
ax.yaxis.set_major_locator(self.ylocater())
ax.set_xticks(ax.get_xticks())
ax.set_yticks(ax.get_yticks())
ax.set_xticklabels(ax.get_xticks(), size=self.template_xtick__labelsize)
ax.set_yticklabels(ax.get_yticks(), size=self.template_ytick__labelsize)
if isinstance(self.xformatter, Formatter):
xformatter = self.xformatter
else:
xformatter = self.xformatter()
if isinstance(self.yformatter, Formatter):
yformatter = self.yformatter
else:
yformatter = self.yformatter()
ax.xaxis.set_major_formatter(xformatter)
ax.yaxis.set_major_formatter(yformatter)
if "zaxis" in dir(ax):
ax.zaxis.set_major_locator(self.zlocater())
ax.set_zticklabels(ax.get_zticks(), size=self.template_ztick__labelsize)
ax.zaxis.set_major_formatter(self.zformatter())
[docs] def annotate(self, ix, multiple, plot, **kargs):
"""Call all the routines necessary to annotate the axes etc.
Args:
ix(integer):
Index of current subplot
multiple (string):
how to handle multiple subplots
plot (Stoner.plot.PlotMixin):
The PlotMixin boject we're working with
"""
if multiple in self.subplot_settings:
if ix == 0:
i = 0
elif ix == len(plot.axes) - 1:
i = 2
else:
i = 1
settings = {k: self.subplot_settings[multiple][k][i] for k in self.subplot_settings[multiple]}
else:
settings = {"xlabel": True, "ylabel": True, "zlabel": True, "title": True}
try:
if "xlabel" in kargs and self.show_xlabel and settings["xlabel"]:
plt.xlabel(str(kargs["xlabel"]), size=self.template_axes__labelsize)
if "ylabel" in kargs and self.show_ylabel and settings["ylabel"]:
plt.ylabel(str(kargs["ylabel"]), size=self.template_axes__labelsize)
if "zlabel" in kargs and self.show_zlabel and settings["zlabel"]:
plot.fig.axes[0].set_zlabel(kargs["zlabel"], size=self.template_axes__labelsize)
if "title" in kargs and self.show_title and settings["title"]:
plt.title(kargs["title"])
if self.showlegend:
plt.legend()
except AttributeError:
pass
[docs]class GBPlotStyle(DefaultPlotStyle):
"""Template developed for Gavin's plotting.
This is largely an experimental class for trying things out rather than
for serious plotting.
Example:
.. plot:: samples/plotstyles/GBStyle.py
:include-source:
:outname: gbstyle
"""
xformatter = TexEngFormatter
yformatter = TexEngFormatter
stylename = "GBStyle"
[docs] def customise_axes(self, ax, plot):
"""Override the default axis configuration."""
super().customise_axes(ax, plot)
ax.spines["top"].set_visible(False)
ax.spines["right"].set_visible(False)
ax.xaxis.set_ticks_position("bottom")
ax.yaxis.set_ticks_position("left")
ax.spines["left"].set_position("zero")
ax.spines["bottom"].set_position("zero")
plt.draw()
[docs]class JTBPlotStyle(DefaultPlotStyle):
"""Template class for Joe's Plot settings.
Example:
.. plot:: samples/plotstyles/JTBStyle.py
:include-source:
:outname: jtbstyle
"""
show_title = False
stylename = "JTB"
[docs] def customise_axes(self, ax, plot):
"""Override the default axis configuration (or not)."""
[docs]class JTBinsetStyle(DefaultPlotStyle):
"""Template class for Joe's Plot settings."""
show_title = False
stylename = "JTBinset"
[docs] def customise_axes(self, ax, plot):
"""Override the default axis configuration (or not)."""
class ThesisPlotStyle(DefaultPlotStyle):
"""Template class for Joe's Plot settings."""
show_title = False
stylename = "thesis"
[docs]class PRBPlotStyle(DefaultPlotStyle):
"""A figure Style for making figures for Phys Rev * Jounrals.
Example:
.. plot:: samples/plotstyles/PRBStyle.py
:include-source:
:outname: prbstyle
"""
show_title = False
stylename = "PRB"
[docs] def customise_axes(self, ax, plot):
"""Override the default axis configuration."""
ax.locator_params(tight=True, nbins=4)
[docs]class SketchPlot(DefaultPlotStyle):
"""Turn on xkcd plot style.
Implemented as a bit of a joke, but perhaps someone will use this in a real
presentation one day ?
Example:
.. plot:: samples/plotstyles/SketchStyle.py
:include-source:
:outname: sketchstyle
"""
stylename = "sketch"
[docs] def customise(self):
"""Force on xkcd style."""
plt.xkcd()
[docs] def customise_axes(self, ax, plot):
"""Override the default axis configuration."""
super().customise_axes(ax, plot)
ax.spines["top"].set_visible(False)
if len(plot.axes) > 1 and plot.multiple == "y2":
pass
else:
ax.spines["right"].set_visible(False)
ax.yaxis.set_ticks_position("left")
ax.xaxis.set_ticks_position("bottom")
ax.xaxis.label.set_rotation(normal(scale=5))
ax.xaxis.label.set_x(0.9)
ax.yaxis.label.set_rotation(normal(90, scale=5))
ax.yaxis.label.set_y(0.9)
for l in ax.get_xticklabels():
l.set_rotation(normal(scale=2))
for l in ax.get_yticklabels():
l.set_rotation(normal(scale=2))
plt.draw()
if SEABORN: # extra classes if we have seaborn available
[docs] class SeabornPlotStyle(DefaultPlotStyle):
"""A plotdtyle that makes use of the seaborn plotting package to make visually attractive plots.
Attributes:
stylename (str):
The seaborn plot style to use - darkgrid, whitegrid, dark, white, or ticks
context (str):
The seaborn plot context for scaling elements - paper,notebook,talk, or poster
palette (str):
A name of a predefined seaborn palette.
Example:
.. plot:: samples/plotstyles/SeabornStyle.py
:include-source:
:outname: seabornstyle
"""
_stylename = None
_context = None
_palette = None
@property
def context(self):
"""Provide context getter."""
return self._context
@context.setter
def context(self, name):
"""Limit context to allowed values."""
if name in ["paper", "notebook", "talk", "poster"]:
self._context = name
else:
raise AttributeError("style name should be one of {paper,notebook,talk,poster}")
@property
def palette(self):
"""Provide palette getter."""
return self._palette
@palette.setter
def palette(self, name):
"""Force palette to take allowed values."""
with sns.color_palette(name):
pass
self._palette = name
@property
def stylename(self):
"""Provide getter for stylename."""
return self._stylename
@stylename.setter
def stylename(self, name):
"""Force stylename to take allowed values only."""
if name in ["darkgrid", "whitegrid", "dark", "white", "ticks"]:
self._stylename = name
else:
raise AttributeError("style name should be one of {darkgrid, whitegrid, dark, white, ticks}")
def apply(self):
"""Override base method to apply seaborn style sheets."""
sns.set_style(style=self.stylename)
sns.set_context(context=self.context)
sns.set_palette(sns.color_palette(self._palette))
self.customise()
else:
SeabornPlotStyle = DefaultPlotStyle
