matplotlib.text

Classes for including text in a figure.

class matplotlib.text.Annotation(text, xy, xytext=None, xycoords='data', textcoords=None, arrowprops=None, annotation_clip=None, **kwargs)

Bases: matplotlib.text.Text, matplotlib.text._AnnotationBase

An Annotation is a Text that can refer to a specific position xy. Optionally an arrow pointing from the text to xy can be drawn.

Attributes:

xy

The annotated position.

xycoords

The coordinate system for xy.

arrow_patch

A FancyArrowPatch to point from xytext to xy.

Annotate the point xy with text text.

In the simplest form, the text is placed at xy.

Optionally, the text can be displayed in another position xytext. An arrow pointing from the text to the annotated point xy can then be added by defining arrowprops.

Parameters:

textstr

The text of the annotation. s is a deprecated synonym for this parameter.

xy(float, float)

The point (x, y) to annotate. The coordinate system is determined by xycoords.

xytext(float, float), default: xy

The position (x, y) to place the text at. The coordinate system is determined by textcoords.

xycoordsstr or Artist or Transform or callable or (float, float), default: 'data'

The coordinate system that xy is given in. The following types of values are supported:

• One of the following strings:

  Value	Description
  'figure points'	Points from the lower left of the figure
  'figure pixels'	Pixels from the lower left of the figure
  'figure fraction'	Fraction of figure from lower left
  'axes points'	Points from lower left corner of axes
  'axes pixels'	Pixels from lower left corner of axes
  'axes fraction'	Fraction of axes from lower left
  'data'	Use the coordinate system of the object being annotated (default)
  'polar'	(theta, r) if not native 'data' coordinates

• An Artist: xy is interpreted as a fraction of the artist's Bbox. E.g. (0, 0) would be the lower left corner of the bounding box and (0.5, 1) would be the center top of the bounding box.

• A Transform to transform xy to screen coordinates.

• A function with one of the following signatures:

  def transform(renderer) -> Bbox
  def transform(renderer) -> Transform
  

  where renderer is a RendererBase subclass.

  The result of the function is interpreted like the Artist and Transform cases above.

• A tuple (xcoords, ycoords) specifying separate coordinate systems for x and y. xcoords and ycoords must each be of one of the above described types.

See Advanced Annotations for more details.

textcoordsstr or Artist or Transform or callable or (float, float), default: value of xycoords

The coordinate system that xytext is given in.

All xycoords values are valid as well as the following strings:

Value	Description
'offset points'	Offset (in points) from the xy value
'offset pixels'	Offset (in pixels) from the xy value

arrowpropsdict, optional

The properties used to draw a FancyArrowPatch arrow between the positions xy and xytext.

If arrowprops does not contain the key 'arrowstyle' the allowed keys are:

Key	Description
width	The width of the arrow in points
headwidth	The width of the base of the arrow head in points
headlength	The length of the arrow head in points
shrink	Fraction of total length to shrink from both ends
?	Any key to matplotlib.patches.FancyArrowPatch

If arrowprops contains the key 'arrowstyle' the above keys are forbidden. The allowed values of 'arrowstyle' are:

Name	Attrs
'-'	None
'->'	head_length=0.4,head_width=0.2
'-['	widthB=1.0,lengthB=0.2,angleB=None
'|-|'	widthA=1.0,widthB=1.0
'-|>'	head_length=0.4,head_width=0.2
'<-'	head_length=0.4,head_width=0.2
'<->'	head_length=0.4,head_width=0.2
'<|-'	head_length=0.4,head_width=0.2
'<|-|>'	head_length=0.4,head_width=0.2
'fancy'	head_length=0.4,head_width=0.4,tail_width=0.4
'simple'	head_length=0.5,head_width=0.5,tail_width=0.2
'wedge'	tail_width=0.3,shrink_factor=0.5

Valid keys for FancyArrowPatch are:

Key	Description
arrowstyle	the arrow style
connectionstyle	the connection style
relpos	default is (0.5, 0.5)
patchA	default is bounding box of the text
patchB	default is None
shrinkA	default is 2 points
shrinkB	default is 2 points
mutation_scale	default is text size (in points)
mutation_aspect	default is 1.
?	any key for matplotlib.patches.PathPatch

Defaults to None, i.e. no arrow is drawn.

annotation_clipbool or None, default: None

Whether to draw the annotation when the annotation point xy is outside the axes area.

• If True, the annotation will only be drawn when xy is within the axes.
• If False, the annotation will always be drawn.
• If None, the annotation will only be drawn when xy is within the axes and xycoords is 'data'.

**kwargs

Additional kwargs are passed to Text.

Returns:

Annotation

See also

Advanced Annotations

property anncoords

The coordinate system to use for Annotation.xyann.

contains(event)

Return whether the mouse event occurred inside the axis-aligned bounding-box of the text.

draw(renderer)

Draw the Artist (and its children) using the given renderer.

This has no effect if the artist is not visible (Artist.get_visible returns False).

Parameters:

rendererRendererBase subclass.

Notes

This method is overridden in the Artist subclasses.

get_anncoords()

Return the coordinate system to use for Annotation.xyann.

See also xycoords in Annotation.

get_window_extent(renderer=None)

Return the Bbox bounding the text and arrow, in display units.

Parameters:

rendererRenderer, optional

A renderer is needed to compute the bounding box. If the artist has already been drawn, the renderer is cached; thus, it is only necessary to pass this argument when calling get_window_extent before the first draw. In practice, it is usually easier to trigger a draw first (e.g. by saving the figure).

set_anncoords(coords)

Set the coordinate system to use for Annotation.xyann.

See also xycoords in Annotation.

set_figure(fig)

Set the Figure instance the artist belongs to.

Parameters:

figFigure

update_positions(renderer)

Update the pixel positions of the annotation text and the arrow patch.

property xyann

The text position.

See also xytext in Annotation.

property xycoords

class matplotlib.text.OffsetFrom(artist, ref_coord, unit='points')

Bases: object

Callable helper class for working with Annotation.

Parameters:

artistArtist or BboxBase or Transform

The object to compute the offset from.

ref_coord(float, float)

If artist is an Artist or BboxBase, this values is the location to of the offset origin in fractions of the artist bounding box.

If artist is a transform, the offset origin is the transform applied to this value.

unit{'points, 'pixels'}, default: 'points'

The screen units to use (pixels or points) for the offset input.

get_unit()

Return the unit for input to the transform used by __call__.

set_unit(unit)

Set the unit for input to the transform used by __call__.

Parameters:

unit{'points', 'pixels'}

class matplotlib.text.Text(x=0, y=0, text='', color=None, verticalalignment='baseline', horizontalalignment='left', multialignment=None, fontproperties=None, rotation=None, linespacing=None, rotation_mode=None, usetex=None, wrap=False, **kwargs)

Bases: matplotlib.artist.Artist

Handle storing and drawing of text in window or data coordinates.

Create a Text instance at x, y with string text.

Valid keyword arguments 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	float or None
animated	bool
backgroundcolor	color
bbox	dict with properties for patches.FancyBboxPatch
clip_box	Bbox
clip_on	bool
clip_path	Patch or (Path, Transform) or None
color or c	color
contains	unknown
figure	Figure
fontfamily or family	{FONTNAME, 'serif', 'sans-serif', 'cursive', 'fantasy', 'monospace'}
fontproperties or font or font_properties	font_manager.FontProperties or str or pathlib.Path
fontsize or size	float or {'xx-small', 'x-small', 'small', 'medium', 'large', 'x-large', 'xx-large'}
fontstretch or stretch	{a numeric value in range 0-1000, 'ultra-condensed', 'extra-condensed', 'condensed', 'semi-condensed', 'normal', 'semi-expanded', 'expanded', 'extra-expanded', 'ultra-expanded'}
fontstyle or style	{'normal', 'italic', 'oblique'}
fontvariant or variant	{'normal', 'small-caps'}
fontweight or weight	{a numeric value in range 0-1000, 'ultralight', 'light', 'normal', 'regular', 'book', 'medium', 'roman', 'semibold', 'demibold', 'demi', 'bold', 'heavy', 'extra bold', 'black'}
gid	str
horizontalalignment or ha	{'center', 'right', 'left'}
in_layout	bool
label	object
linespacing	float (multiple of font size)
multialignment or ma	{'left', 'right', 'center'}
path_effects	AbstractPathEffect
picker	None or bool or callable
position	(float, float)
rasterized	bool or None
rotation	float or {'vertical', 'horizontal'}
rotation_mode	{None, 'default', 'anchor'}
sketch_params	(scale: float, length: float, randomness: float)
snap	bool or None
text	object
transform	Transform
url	str
usetex	bool or None
verticalalignment or va	{'center', 'top', 'bottom', 'baseline', 'center_baseline'}
visible	bool
wrap	bool
x	float
y	float
zorder	float

contains(mouseevent)

Return whether the mouse event occurred inside the axis-aligned bounding-box of the text.

draw(renderer)

Draw the Artist (and its children) using the given renderer.

This has no effect if the artist is not visible (Artist.get_visible returns False).

Parameters:

rendererRendererBase subclass.

Notes

This method is overridden in the Artist subclasses.

get_bbox_patch()

Return the bbox Patch, or None if the patches.FancyBboxPatch is not made.

get_c()

Alias for get_color.

get_color()

Return the color of the text.

get_family()

Alias for get_fontfamily.

get_font()

Alias for get_fontproperties.

get_font_properties()

Alias for get_fontproperties.

get_fontfamily()

Return the list of font families used for font lookup.

See also

font_manager.FontProperties.get_family

get_fontname()

Return the font name as a string.

See also

font_manager.FontProperties.get_name

get_fontproperties()

Return the font_manager.FontProperties.

get_fontsize()

Return the font size as an integer.

See also

font_manager.FontProperties.get_size_in_points

get_fontstyle()

Return the font style as a string.

See also

font_manager.FontProperties.get_style

get_fontvariant()

Return the font variant as a string.

See also

font_manager.FontProperties.get_variant

get_fontweight()

Return the font weight as a string or a number.

See also

font_manager.FontProperties.get_weight

get_ha()

Alias for get_horizontalalignment.

get_horizontalalignment()

Return the horizontal alignment as a string. Will be one of 'left', 'center' or 'right'.

get_name()

Alias for get_fontname.

get_position()

Return the (x, y) position of the text.

get_prop_tup(renderer=None)

Return a hashable tuple of properties.

Not intended to be human readable, but useful for backends who want to cache derived information about text (e.g., layouts) and need to know if the text has changed.

get_rotation()

Return the text angle in degrees between 0 and 360.

get_rotation_mode()

Return the text rotation mode.

get_size()

Alias for get_fontsize.

get_stretch()

Return the font stretch as a string or a number.

See also

font_manager.FontProperties.get_stretch

get_style()

Alias for get_fontstyle.

get_text()

Return the text string.

get_unitless_position()

Return the (x, y) unitless position of the text.

get_usetex()

Return whether this Text object uses TeX for rendering.

get_va()

Alias for get_verticalalignment.

get_variant()

Alias for get_fontvariant.

get_verticalalignment()

Return the vertical alignment as a string. Will be one of 'top', 'center', 'bottom' or 'baseline'.

get_weight()

Alias for get_fontweight.

get_window_extent(renderer=None, dpi=None)

Return the Bbox bounding the text, in display units.

In addition to being used internally, this is useful for specifying clickable regions in a png file on a web page.

Parameters:

rendererRenderer, optional

A renderer is needed to compute the bounding box. If the artist has already been drawn, the renderer is cached; thus, it is only necessary to pass this argument when calling get_window_extent before the first draw. In practice, it is usually easier to trigger a draw first (e.g. by saving the figure).

dpifloat, optional

The dpi value for computing the bbox, defaults to self.figure.dpi (not the renderer dpi); should be set e.g. if to match regions with a figure saved with a custom dpi value.

get_wrap()

Return whether the text can be wrapped.

set_backgroundcolor(color)

Set the background color of the text by updating the bbox.

Parameters:

colorcolor

See also

set_bbox

To change the position of the bounding box

set_bbox(rectprops)

Draw a bounding box around self.

Parameters:

rectpropsdict with properties for patches.FancyBboxPatch

The default boxstyle is 'square'. The mutation scale of the patches.FancyBboxPatch is set to the fontsize.

Examples

t.set_bbox(dict(facecolor='red', alpha=0.5))

set_c(color)

Alias for set_color.

set_clip_box(clipbox)

Set the artist's clip Bbox.

Parameters:

clipboxBbox

set_clip_on(b)

Set whether the artist uses clipping.

When False artists will be visible outside of the axes which can lead to unexpected results.

Parameters:

bbool

set_clip_path(path, transform=None)

Set the artist's clip path.

Parameters:

pathPatch or Path or TransformedPath or None

The clip path. If given a Path, transform must be provided as well. If None, a previously set clip path is removed.

transformTransform, optional

Only used if path is a Path, in which case the given Path is converted to a TransformedPath using transform.

Notes

For efficiency, if path is a Rectangle this method will set the clipping box to the corresponding rectangle and set the clipping path to None.

For technical reasons (support of set), a tuple (path, transform) is also accepted as a single positional parameter.

set_color(color)

Set the foreground color of the text

Parameters:

colorcolor

set_family(fontname)

Alias for set_fontfamily.

set_font(fp)

Alias for set_fontproperties.

set_font_properties(fp)

Alias for set_fontproperties.

set_fontfamily(fontname)

Set the font family. May be either a single string, or a list of strings in decreasing priority. Each string may be either a real font name or a generic font class name. If the latter, the specific font names will be looked up in the corresponding rcParams.

If a Text instance is constructed with fontfamily=None, then the font is set to rcParams["font.family"] (default: ['sans-serif']), and the same is done when set_fontfamily() is called on an existing Text instance.

Parameters:

fontname{FONTNAME, 'serif', 'sans-serif', 'cursive', 'fantasy', 'monospace'}

See also

font_manager.FontProperties.set_family

set_fontname(fontname)

Alias for set_family.

One-way alias only: the getter differs.

Parameters:

fontname{FONTNAME, 'serif', 'sans-serif', 'cursive', 'fantasy', 'monospace'}

See also

font_manager.FontProperties.set_family

set_fontproperties(fp)

Set the font properties that control the text.

Parameters:

fpfont_manager.FontProperties or str or pathlib.Path

If a str, it is interpreted as a fontconfig pattern parsed by FontProperties. If a pathlib.Path, it is interpreted as the absolute path to a font file.

set_fontsize(fontsize)

Set the font size.

Parameters:

fontsizefloat or {'xx-small', 'x-small', 'small', 'medium', 'large', 'x-large', 'xx-large'}

If float, the fontsize in points. The string values denote sizes relative to the default font size.

See also

font_manager.FontProperties.set_size

set_fontstretch(stretch)

Set the font stretch (horizontal condensation or expansion).

Parameters:

stretch{a numeric value in range 0-1000, 'ultra-condensed', 'extra-condensed', 'condensed', 'semi-condensed', 'normal', 'semi-expanded', 'expanded', 'extra-expanded', 'ultra-expanded'}

See also

font_manager.FontProperties.set_stretch

set_fontstyle(fontstyle)

Set the font style.

Parameters:

fontstyle{'normal', 'italic', 'oblique'}

See also

font_manager.FontProperties.set_style

set_fontvariant(variant)

Set the font variant.

Parameters:

variant{'normal', 'small-caps'}

See also

font_manager.FontProperties.set_variant

set_fontweight(weight)

Set the font weight.

Parameters:

weight{a numeric value in range 0-1000, 'ultralight', 'light', 'normal', 'regular', 'book', 'medium', 'roman', 'semibold', 'demibold', 'demi', 'bold', 'heavy', 'extra bold', 'black'}

See also

font_manager.FontProperties.set_weight

set_ha(align)

Alias for set_horizontalalignment.

set_horizontalalignment(align)

Set the horizontal alignment to one of

Parameters:

align{'center', 'right', 'left'}

set_linespacing(spacing)

Set the line spacing as a multiple of the font size.

The default line spacing is 1.2.

Parameters:

spacingfloat (multiple of font size)

set_ma(align)

Alias for set_multialignment.

set_multialignment(align)

Set the text alignment for multiline texts.

The layout of the bounding box of all the lines is determined by the horizontalalignment and verticalalignment properties. This property controls the alignment of the text lines within that box.

Parameters:

align{'left', 'right', 'center'}

set_name(fontname)

Alias for set_fontname.

set_position(xy)

Set the (x, y) position of the text.

Parameters:

xy(float, float)

set_rotation(s)

Set the rotation of the text.

Parameters:

sfloat or {'vertical', 'horizontal'}

The rotation angle in degrees in mathematically positive direction (counterclockwise). 'horizontal' equals 0, 'vertical' equals 90.

set_rotation_mode(m)

Set text rotation mode.

Parameters:

m{None, 'default', 'anchor'}

If None or "default", the text will be first rotated, then aligned according to their horizontal and vertical alignments. If "anchor", then alignment occurs before rotation.

set_size(fontsize)

Alias for set_fontsize.

set_stretch(stretch)

Alias for set_fontstretch.

set_style(fontstyle)

Alias for set_fontstyle.

set_text(s)

Set the text string s.

It may contain newlines (\n) or math in LaTeX syntax.

Parameters:

sobject

Any object gets converted to its str representation, except for None which is converted to an empty string.

set_usetex(usetex)

Parameters:

usetexbool or None

Whether to render using TeX, None means to use rcParams["text.usetex"] (default: False).

set_va(align)

Alias for set_verticalalignment.

set_variant(variant)

Alias for set_fontvariant.

set_verticalalignment(align)

Set the vertical alignment.

Parameters:

align{'center', 'top', 'bottom', 'baseline', 'center_baseline'}

set_weight(weight)

Alias for set_fontweight.

set_wrap(wrap)

Set whether the text can be wrapped.

Parameters:

wrapbool

set_x(x)

Set the x position of the text.

Parameters:

xfloat

set_y(y)

Set the y position of the text.

Parameters:

yfloat

update(kwargs)

Update this artist's properties from the dict props.

Parameters:

propsdict

update_bbox_position_size(renderer)

Update the location and the size of the bbox.

This method should be used when the position and size of the bbox needs to be updated before actually drawing the bbox.

update_from(other)

Copy properties from other to self.

zorder = 3

matplotlib.text.get_rotation(rotation)

Return rotation normalized to an angle between 0 and 360 degrees.

Parameters:

rotationfloat or {None, 'horizontal', 'vertical'}

Rotation angle in degrees. None and 'horizontal' equal 0, 'vertical' equals 90.

Returns:

float