magni.utils.plotting module¶
Module providing utilities for control of plotting using matplotlib
.
The module has a number of public attributes which provide settings for
colormap cycles, linestyle cycles, and marker cycles that may be used in
combination with matplotlib
.
Routine listings¶
- setup_matplotlib(settings={}, cmap=None)
- Function that set the Magni default
matplotlib
configuration. - colour_collections : dict
- Collections of colours that may be used in e.g., a
matplotlib
color_cycle / prop_cycle. - seq_cmaps : list
- Names of
matplotlib.cm
colormaps optimized for sequential data. - div_cmaps : list
- Names of
matplotlib.cm
colormaps optimized for diverging data. - linestyles : list
- A subset of linestyles from
matplotlib.lines
- markers : list
- A subset of markers from
matplotlib.markers
Examples
Use the default Magni matplotlib settings.
>>> import magni
>>> magni.utils.plotting.setup_matplotlib()
Get the normalised ‘Blue’ colour brew from the psp colour map:
>>> magni.utils.plotting.colour_collections['psp']['Blue']
((0.1255, 0.502, 0.8745),)
-
class
magni.utils.plotting.
_ColourCollection
(brews)[source]¶ Bases:
object
A container for colour maps.
A single colour is stored as an RGB 3-tuple of integers in the interval [0,255]. A set of related colours is termed a colour brew and is stored as a list of colours. A set of related colour brews is termed a colour collection and is stored as a dictionary. The dictionary key identifies the name of the colour collection whereas the value is the list of colour brews.
The default colour collections named “cb*” are colorblind safe, print friendly, and photocopy-able. They have been created using the online ColorBrewer 2.0 tool [1].
Parameters: brews (dict) – The dictionary of colour brews from which the colour collection is created. Notes
Each colour brew is a list (or tuple) of length 3 lists (or tuples) of RGB values.
References
[1] M. Harrower and C. A. Brewer, “ColorBrewer.org: An Online Tool for Selecting Colour Schemes for Maps”, The Cartographic Journal, vol. 40, pp. 27-37, 2003 (See also: http://colorbrewer2.org/) -
__getitem__
(name)[source]¶ Return a single colour brew.
The returned colour brew is normalised in the sense of matplotlib normalised rgb values, i.e., colours are 3-tuples of floats in the interval [0, 1].
Parameters: name (str) – Name of the colour brew to return. Returns: brew (tuple) – A colour brew list.
-
-
magni.utils.plotting.
setup_matplotlib
(settings={}, cmap=None)[source]¶ Adjust the configuration of
matplotlib
.Sets the default configuration of
matplotlib
to optimize for producing high quality plots of the data produced by the functionality provided in the Magni.Parameters: - settings (dict, optional) – A dictionary of custom matplotlibrc settings. See examples for details about the structure of the dictionary.
- cmap (str or tuple, optional) – Colormap to be used by matplotlib (the default is None, which implices that the ‘coolwarm’ colormap is used). If a tuple is supplied it must be a (‘colormap_name’, matplotlib.colors.Colormap()) tuple.
Raises: UserWarning
– If the supplied custom settings are invalid.Examples
For example, set lines.linewidth=2 and lines.color=’r’.
>>> from magni.utils.plotting import setup_matplotlib >>> custom_settings = {'lines': {'linewidth': 2, 'color': 'r'}} >>> setup_matplotlib(custom_settings)