python matplotlib notes: configuration management

python matplotlib notes: configuration management

Common configuration items:

axes: Set the color of the axis boundary and surface, axis scale, and grid display;

xticks, yticks: Set the color, size, spacing, direction, label size, etc. for the major and minor ticks of the x-axis and y-axis;

backend: Set the TkAgg and GTKAgg of the target output;

Figure: Control dpi, border color, figure size and subplot settings;

font: font family, font size, style settings;

grid: Set grid color and line style;

legend: Set the display of the legend and its text;

line: Set lines (color, line type, width, etc.) and markers;

Patch: Graphic objects that fill 2D space, such as polygons and circles, control line width, color, anti-aliasing settings, etc.;

savefig: You can make individual settings for saved graphics, such as setting the background of the rendered file to white, etc.;

text: Set font color, text parsing, etc.;

verbose: Set the information output of matplotlib during execution, such as silent, helpful, etc.;

2. Modify the default configuration
matplotlib.rc(group, **kwargs):
set the current rcParams.
group is a grouping of rc, for example, for lines.linewidth, the grouping is lines, for axes.facecolor, the grouping is axes, and so on.
group can also be a list or tuple of group names, such as (xtick, ytick).
kwargs is a dictionary of attribute name/value pairs.
Two usages:

rc('lines', linewidth=2, color='r')

another kind:

rcParams['lines.linewidth'] = 2
rcParams['lines.color'] = 'r'

Expand the first way of writing:

font = {
    
    'family' : 'monospace',
        'weight' : 'bold',
        'size'   : 'larger'}
rc('font', **font)  # pass in the font dict as kwargs

The following aliases can be used to save interactive user input:

Alias	Property
‘lw’	‘linewidth’
‘ls’	'line style'
‘c’	‘color’
‘fc’	‘facecolor’
‘ec’	‘edgecolor’
‘mew’	‘markeredgewidth’
‘aa’	‘antialiased’

rc_context:
Returns a context manager for temporarily changing rcParams

with mpl.rc_context({
    
    'interactive': False}):
    fig, ax = plt.subplots()
    ax.plot(range(3), range(3))
    fig.savefig('example.png')
    plt.close(fig)

rcdefaults:
Restore the setting of rcParams from Matplotlib's internal default styles.
Those defined in matplotlib.style.core.STYLE_BLACKLIST will not be updated;

matplotlib.rcdefaults()

Other configuration methods include:

# 从 Matplotlib 的内部默认样式恢复
matplotlib.rc_file_defaults()

# 从文件更新。
matplotlib.rc_file(fname, *, use_default_template=True)

# 从 Matplotlib 加载的原始 rc 文件中恢复rc_params
matplotlib.rc_params(fail_on_error=False)

# 从文件fname中读取 配置列表
matplotlib.rc_params_from_file(fname, fail_on_error=False, use_default_template=True)

# 获取配置文件的位置。
matplotlib.get_configdir()

# Get the location of the config file.
matplotlib.matplotlib_fname()

# 返回 Matplotlib 数据的路径。
matplotlib.get_data_path()