pyvista.Plotter.add_scalar_bar

Plotter.add_scalar_bar(

title='',

mapper=None,

n_labels=5,

italic=False,

bold=False,

title_font_size=None,

label_font_size=None,

color=None,

font_family=None,

shadow=False,

width=None,

height=None,

position_x=None,

position_y=None,

vertical=None,

interactive=None,

fmt=None,

use_opacity=True,

outline=False,

nan_annotation=False,

below_label=None,

above_label=None,

background_color=None,

n_colors=None,

fill=False,

render=False,

theme=None,

unconstrained_font_size=False,

)

Create scalar bar using the ranges as set by the last input mesh.

Parameters:

titlestr, default: “”

Title of the scalar bar. Default is rendered as an empty title.

mappervtkMapper, optional

Mapper used for the scalar bar. Defaults to the last mapper created by the plotter.

n_labelsint, default: 5

Number of labels to use for the scalar bar.

italicbool, default: False

Italicises title and bar labels.

boldbool, default: False

Bolds title and bar labels.

title_font_sizefloat, optional

Sets the size of the title font. Defaults to None and is sized according to pyvista.plotting.themes.Theme.font.

label_font_sizefloat, optional

Sets the size of the title font. Defaults to None and is sized according to pyvista.plotting.themes.Theme.font.

colorColorLike, optional

Either a string, rgb list, or hex color string. Default set by pyvista.plotting.themes.Theme.font. Can be in one of the following formats:

• color='white'

• color='w'

• color=[1.0, 1.0, 1.0]

• color='#FFFFFF'

font_family{‘courier’, ‘times’, ‘arial’}

Font family. Default is set by pyvista.plotting.themes.Theme.font.

shadowbool, default: False

Adds a black shadow to the text.

widthfloat, optional

The percentage (0 to 1) width of the window for the colorbar. Default set by pyvista.plotting.themes.Theme.colorbar_vertical or pyvista.plotting.themes.Theme.colorbar_horizontal depending on the value of vertical.

heightfloat, optional

The percentage (0 to 1) height of the window for the colorbar. Default set by pyvista.plotting.themes.Theme.colorbar_vertical or pyvista.plotting.themes.Theme.colorbar_horizontal depending on the value of vertical.

position_xfloat, optional

The percentage (0 to 1) along the windows’s horizontal direction to place the bottom left corner of the colorbar. Default set by pyvista.plotting.themes.Theme.colorbar_vertical or pyvista.plotting.themes.Theme.colorbar_horizontal depending on the value of vertical.

position_yfloat, optional

The percentage (0 to 1) along the windows’s vertical direction to place the bottom left corner of the colorbar. Default set by pyvista.plotting.themes.Theme.colorbar_vertical or pyvista.plotting.themes.Theme.colorbar_horizontal depending on the value of vertical.

verticalbool, optional

Use vertical or horizontal scalar bar. Default set by pyvista.plotting.themes.Theme.colorbar_orientation.

interactivebool, optional

Use a widget to control the size and location of the scalar bar. Default set by pyvista.plotting.themes.Theme.interactive.

fmtstr, optional

printf format for labels. Default set by pyvista.plotting.themes.Theme.font.

use_opacitybool, default: True

Optionally display the opacity mapping on the scalar bar.

outlinebool, default: False

Optionally outline the scalar bar to make opacity mappings more obvious.

nan_annotationbool, default: False

Annotate the NaN color.

below_labelstr, optional

String annotation for values below the scalars range.

above_labelstr, optional

String annotation for values above the scalars range.

background_colorColorLike, optional

The color used for the background in RGB format.

n_colorsint, optional

The maximum number of color displayed in the scalar bar.

fillbool, default: False

Draw a filled box behind the scalar bar with the background_color.

renderbool, default: False

Force a render when True.

themepyvista.plotting.themes.Theme, optional

Plot-specific theme. By default, calling from the Plotter, will use the plotter theme. Setting to None will use the global theme.

unconstrained_font_sizebool, default: False

Whether the font size of title and labels is unconstrained. When it is constrained, the size of the scalar bar will constrain the font size. When it is not, the size of the font will always be respected. Using custom labels will force this to be True.

Added in version 0.44.0.

Returns:

vtk.vtkScalarBarActor

Scalar bar actor.

Notes

Setting title_font_size, or label_font_size disables automatic font sizing for both the title and label.

Examples

Add a custom interactive scalar bar that is horizontal, has an outline, and has a custom formatting.

>>> import pyvista as pv
>>> sphere = pv.Sphere()
>>> sphere['Data'] = sphere.points[:, 2]
>>> plotter = pv.Plotter()
>>> _ = plotter.add_mesh(sphere, show_scalar_bar=False)
>>> _ = plotter.add_scalar_bar(
...     'Data',
...     interactive=True,
...     vertical=False,
...     title_font_size=35,
...     label_font_size=30,
...     outline=True,
...     fmt='%10.5f',
... )
>>> plotter.show()

Static Scene

Interactive Scene