mpl_toolkits.axes_grid1.anchored_artists.AnchoredSizeBar

class mpl_toolkits.axes_grid1.anchored_artists.AnchoredSizeBar(transform, size, label, loc, pad=0.1, borderpad=0.1, sep=2, frameon=True, size_vertical=0, color='black', label_top=False, fontproperties=None, fill_bar=None, **kwargs)[source]

Bases: matplotlib.offsetbox.AnchoredOffsetbox

Draw a horizontal scale bar with a center-aligned label underneath.

Parameters
transformmatplotlib.transforms.Transform

The transformation object for the coordinate system in use, i.e., matplotlib.axes.Axes.transData.

sizefloat

Horizontal length of the size bar, given in coordinates of transform.

labelstr

Label to display.

locstr

Location of this ellipse. Valid locations are 'upper left', 'upper center', 'upper right', 'center left', 'center', 'center right', 'lower left', 'lower center, 'lower right'. For backward compatibility, numeric values are accepted as well. See the parameter loc of Legend for details.

padfloat, default: 0.1

Padding around the label and size bar, in fraction of the font size.

borderpadfloat, default: 0.1

Border padding, in fraction of the font size.

sepfloat, default: 2

Separation between the label and the size bar, in points.

frameonbool, default: True

If True, draw a box around the horizontal bar and label.

size_verticalfloat, default: 0

Vertical length of the size bar, given in coordinates of transform.

colorstr, default: 'black'

Color for the size bar and label.

label_topbool, default: False

If True, the label will be over the size bar.

fontpropertiesmatplotlib.font_manager.FontProperties, optional

Font properties for the label text.

fill_barbool, optional

If True and if size_vertical is nonzero, the size bar will be filled in with the color specified by the size bar. Defaults to True if size_vertical is greater than zero and False otherwise.

**kwargs

Keyword arguments forwarded to AnchoredOffsetbox.

Notes

If prop is passed as a keyword argument, but fontproperties is not, then prop is be assumed to be the intended fontproperties. Using both prop and fontproperties is not supported.

Examples

>>> import matplotlib.pyplot as plt
>>> import numpy as np
>>> from mpl_toolkits.axes_grid1.anchored_artists import (
...     AnchoredSizeBar)
>>> fig, ax = plt.subplots()
>>> ax.imshow(np.random.random((10, 10)))
>>> bar = AnchoredSizeBar(ax.transData, 3, '3 data units', 4)
>>> ax.add_artist(bar)
>>> fig.show()

Using all the optional parameters

>>> import matplotlib.font_manager as fm
>>> fontprops = fm.FontProperties(size=14, family='monospace')
>>> bar = AnchoredSizeBar(ax.transData, 3, '3 units', 4, pad=0.5,
...                       sep=5, borderpad=0.5, frameon=False,
...                       size_vertical=0.5, color='white',
...                       fontproperties=fontprops)
Attributes
size_barmatplotlib.offsetbox.AuxTransformBox

Container for the size bar.

txt_labelmatplotlib.offsetbox.TextArea

Container for the label of the size bar.

set(*, agg_filter=<UNSET>, alpha=<UNSET>, animated=<UNSET>, bbox_to_anchor=<UNSET>, child=<UNSET>, clip_box=<UNSET>, clip_on=<UNSET>, clip_path=<UNSET>, gid=<UNSET>, height=<UNSET>, in_layout=<UNSET>, label=<UNSET>, mouseover=<UNSET>, offset=<UNSET>, path_effects=<UNSET>, picker=<UNSET>, rasterized=<UNSET>, sketch_params=<UNSET>, snap=<UNSET>, transform=<UNSET>, url=<UNSET>, visible=<UNSET>, width=<UNSET>, zorder=<UNSET>)[source]

Set multiple properties at once.

Supported properties are

Property

Description

agg_filter

a filter function, which takes a (m, n, 3) float array and a dpi value, and returns a (m, n, 3) array

alpha

scalar or None

animated

bool

bbox_to_anchor

unknown

child

unknown

clip_box

Bbox

clip_on

bool

clip_path

Patch or (Path, Transform) or None

figure

Figure

gid

str

height

float

in_layout

bool

label

object

mouseover

bool

offset

(float, float) or callable

path_effects

AbstractPathEffect

picker

None or bool or float or callable

rasterized

bool

sketch_params

(scale: float, length: float, randomness: float)

snap

bool or None

transform

Transform

url

str

visible

bool

width

float

zorder

float

Examples using mpl_toolkits.axes_grid1.anchored_artists.AnchoredSizeBar