text

matplotlib.text

Classes for including text in a figure.

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

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

Annotate the point xy with text s.

Additional kwargs are passed to Text.

Parameters:

s : str

The text of the annotation

xy : iterable

Length 2 sequence specifying the (x,y) point to annotate

xytext : iterable, optional

Length 2 sequence specifying the (x,y) to place the text at. If None, defaults to xy.

xycoords : str, Artist, Transform, callable or tuple, optional

The coordinate system that xy is given in.

For a str the allowed values are:

Property	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

If a Artist object is passed in the units are fraction if it's bounding box.

If a Transform object is passed in use that to transform xy to screen coordinates

If a callable it must take a RendererBase object as input and return a Transform or Bbox object

If a tuple must be length 2 tuple of str, Artist, Transform or callable objects. The first transform is used for the x coordinate and the second for y.

See Advanced Annotation for more details.

Defaults to 'data'

textcoords : str, Artist, Transform, callable or tuple, optional

The coordinate system that xytext is given, which may be different than the coordinate system used for xy.

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

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

defaults to the input of xycoords

arrowprops : dict, optional

If not None, properties used to draw a FancyArrowPatch arrow between 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 the 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

annotation_clip : bool, optional

Controls the visibility of the annotation when it goes outside the axes area.

If True, the annotation will only be drawn when the xy is inside the axes. If False, the annotation will always be drawn regardless of its position.

The default is None, which behave as True only if xycoords is "data".

Returns:

Annotation

anncoords

contains(event)

Test whether the mouse event occurred in the patch.

In the case of text, a hit is true anywhere in the axis-aligned bounding-box containing the text.

Returns True or False.

draw(renderer)

Draw the Annotation object to the given renderer.

get_window_extent(renderer=None)

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

renderer defaults to the _renderer attribute of the text object. This is not assigned until the first execution of draw(), so you must use this kwarg if you want to call get_window_extent() prior to the first draw(). For getting web page regions, it is simpler to call the method after saving the figure. The dpi used defaults to self.figure.dpi; the renderer dpi is irrelevant.

set_figure(fig)

Set the Figure instance the artist belongs to.

Parameters:

fig : Figure

update_positions(renderer)

"Update the pixel positions of the annotated point and the text.

xyann

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

Bases: object

Callable helper class for working with Annotation

Parameters:

artist : Artist, BboxBase, or Transform

The object to compute the offset from.

ref_coord : length 2 sequence

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'}

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

get_unit()

The unit for input to the transform used by __call__

set_unit(unit)

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 kwargs 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 (0.0 transparent through 1.0 opaque)
animated	bool
backgroundcolor	any matplotlib color
bbox	FancyBboxPatch prop dict
clip_box	a matplotlib.transforms.Bbox instance
clip_on	bool
clip_path	[ (Path, Transform) | Patch | None ]
color	any matplotlib color
contains	a callable function
family or fontfamily or fontname or name	[FONTNAME | 'serif' | 'sans-serif' | 'cursive' | 'fantasy' | 'monospace' ]
figure	a Figure instance
fontproperties or font_properties	a matplotlib.font_manager.FontProperties instance
gid	an id string
horizontalalignment or ha	[ 'center' | 'right' | 'left' ]
label	object
linespacing	float (multiple of font size)
multialignment or ma	['left' | 'right' | 'center' ]
path_effects	AbstractPathEffect
picker	[None | bool | float | callable]
position	(x,y)
rasterized	bool or None
rotation	[ angle in degrees | 'vertical' | 'horizontal' ]
rotation_mode	[ None | "default" | "anchor" ]
size or fontsize	[size in points | 'xx-small' | 'x-small' | 'small' | 'medium' | 'large' | 'x-large' | 'xx-large' ]
sketch_params	(scale: float, length: float, randomness: float)
snap	bool or None
stretch or fontstretch	[a numeric value in range 0-1000 | 'ultra-condensed' | 'extra-condensed' | 'condensed' | 'semi-condensed' | 'normal' | 'semi-expanded' | 'expanded' | 'extra-expanded' | 'ultra-expanded' ]
style or fontstyle	[ 'normal' | 'italic' | 'oblique']
text	string or anything printable with '%s' conversion.
transform	Transform
url	a url string
usetex	bool or None
variant or fontvariant	[ 'normal' | 'small-caps' ]
verticalalignment or va	[ 'center' | 'top' | 'bottom' | 'baseline' ]
visible	bool
weight or fontweight	[a numeric value in range 0-1000 | 'ultralight' | 'light' | 'normal' | 'regular' | 'book' | 'medium' | 'roman' | 'semibold' | 'demibold' | 'demi' | 'bold' | 'heavy' | 'extra bold' | 'black' ]
wrap	bool
x	float
y	float
zorder	float

contains(mouseevent)

Test whether the mouse event occurred in the patch.

In the case of text, a hit is true anywhere in the axis-aligned bounding-box containing the text.

Returns True or False.

draw(renderer)

Draws the Text object to the given renderer.

get_bbox_patch()

Return the bbox Patch object. Returns None if the FancyBboxPatch is not made.

get_color()

Return the color of the text

get_family()

Return the list of font families used for font lookup

get_font_properties()

alias for get_fontproperties

get_fontfamily()

alias for get_family

get_fontname()

alias for get_name

get_fontproperties()

Return the FontProperties object

get_fontsize()

alias for get_size

get_fontstretch()

alias for get_stretch

get_fontstyle()

alias for get_style

get_fontvariant()

alias for get_variant

get_fontweight()

alias for get_weight

get_ha()

alias for get_horizontalalignment

get_horizontalalignment()

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

get_name()

Return the font name as string

get_position()

Return the position of the text as a tuple (x, y)

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 as float in degrees

get_rotation_mode()

get text rotation mode

get_size()

Return the font size as integer

get_stretch()

Get the font stretch as a string or number

get_style()

Return the font style as string

get_text()

Get the text as string

get_unitless_position()

Return the unitless position of the text as a tuple (x, y)

get_usetex()

Return whether this Text object uses TeX for rendering.

If the user has not manually set this value, it defaults to rcParams["text.usetex"].

get_va()

alias for getverticalalignment()

get_variant()

Return the font variant as a string

get_verticalalignment()

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

get_weight()

Get the font weight as string or number

get_window_extent(renderer=None, dpi=None)

Return a Bbox object 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.

renderer defaults to the _renderer attribute of the text object. This is not assigned until the first execution of draw(), so you must use this kwarg if you want to call get_window_extent() prior to the first draw(). For getting web page regions, it is simpler to call the method after saving the figure.

dpi defaults to self.figure.dpi; the renderer dpi is irrelevant. For the web application, if figure.dpi is not the value used when saving the figure, then the value that was used must be specified as the dpi argument.

get_wrap()

Returns the wrapping state for the text.

static is_math_text(s, usetex=None)

Returns a cleaned string and a boolean flag. The flag indicates if the given string s contains any mathtext, determined by counting unescaped dollar signs. If no mathtext is present, the cleaned string has its dollar signs unescaped. If usetex is on, the flag always has the value "TeX".

set_backgroundcolor(color)

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

See also

set_bbox()

To change the position of the bounding box.

ACCEPTS: any matplotlib color

set_bbox(rectprops)

Draw a bounding box around self. rectprops are any settable properties for a FancyBboxPatch, e.g., facecolor='red', alpha=0.5.

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

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

ACCEPTS: FancyBboxPatch prop dict

set_clip_box(clipbox)

Set the artist's clip Bbox.

ACCEPTS: a matplotlib.transforms.Bbox instance

set_clip_on(b)

Set whether artist uses clipping.

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

Parameters:

b : bool

set_clip_path(path, transform=None)

Set the artist's clip path, which may be:

• a Patch (or subclass) instance

• a Path instance, in which case

  an optional Transform instance may be provided, which will be applied to the path before using it for clipping.

• None, to remove the clipping path

For efficiency, if the path happens to be an axis-aligned rectangle, this method will set the clipping box to the corresponding rectangle and set the clipping path to None.

ACCEPTS: [ (Path, Transform) | Patch | None ]

set_color(color)

Set the foreground color of the text

ACCEPTS: any matplotlib color

set_family(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 matplotlibrc file.

ACCEPTS: [FONTNAME | 'serif' | 'sans-serif' | 'cursive' | 'fantasy' |

'monospace' ]

set_font_properties(fp)

alias for set_fontproperties

set_fontname(fontname)

alias for set_family

set_fontproperties(fp)

Set the font properties that control the text. fp must be a matplotlib.font_manager.FontProperties object.

ACCEPTS: a matplotlib.font_manager.FontProperties instance

set_fontsize(fontsize)

alias for set_size

set_fontstretch(stretch)

alias for set_stretch

set_fontstyle(fontstyle)

alias for set_style

set_fontvariant(variant)

alias for set_variant

set_fontweight(weight)

alias for set_weight

set_ha(align)

alias for set_horizontalalignment

set_horizontalalignment(align)

Set the horizontal alignment to one of

ACCEPTS: [ 'center' | 'right' | 'left' ]

set_linespacing(spacing)

Set the line spacing as a multiple of the font size. Default is 1.2.

ACCEPTS: float (multiple of font size)

set_ma(align)

alias for set_multialignment

set_multialignment(align)

Set the alignment for multiple lines layout. The layout of the bounding box of all the lines is determined bu the horizontalalignment and verticalalignment properties, but the multiline text within that box can be

ACCEPTS: ['left' | 'right' | 'center' ]

set_name(fontname)

alias for set_family

set_position(xy)

Set the (x, y) position of the text

ACCEPTS: (x,y)

set_rotation(s)

Set the rotation of the text

ACCEPTS: [ angle in degrees | 'vertical' | 'horizontal' ]

set_rotation_mode(m)

Set text rotation mode.

Parameters:

m : None or "default" or "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)

Set the font size. May be either a size string, relative to the default font size, or an absolute font size in points.

ACCEPTS: [size in points | 'xx-small' | 'x-small' | 'small' |

'medium' | 'large' | 'x-large' | 'xx-large' ]

set_stretch(stretch)

Set the font stretch (horizontal condensation or expansion).

ACCEPTS: [a numeric value in range 0-1000 | 'ultra-condensed' |

'extra-condensed' | 'condensed' | 'semi-condensed' | 'normal' | 'semi-expanded' | 'expanded' | 'extra-expanded' | 'ultra-expanded' ]

set_style(fontstyle)

Set the font style.

ACCEPTS: [ 'normal' | 'italic' | 'oblique']

set_text(s)

Set the text string s

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

ACCEPTS: string or anything printable with '%s' conversion.

set_usetex(usetex)

Parameters:

usetex : bool or None

Whether to render using TeX, None means to use rcParams["text.usetex"].

set_va(align)

alias for set_verticalalignment

set_variant(variant)

Set the font variant, either 'normal' or 'small-caps'.

ACCEPTS: [ 'normal' | 'small-caps' ]

set_verticalalignment(align)

Set the vertical alignment

ACCEPTS: [ 'center' | 'top' | 'bottom' | 'baseline' ]

set_weight(weight)

Set the font weight.

ACCEPTS: [a numeric value in range 0-1000 | 'ultralight' | 'light' |

'normal' | 'regular' | 'book' | 'medium' | 'roman' | 'semibold' | 'demibold' | 'demi' | 'bold' | 'heavy' | 'extra bold' | 'black' ]

set_wrap(wrap)

Sets the wrapping state for the text.

Parameters:

wrap : bool

set_x(x)

Set the x position of the text

ACCEPTS: float

set_y(y)

Set the y position of the text

ACCEPTS: float

update(kwargs)

Update properties from a dictionary.

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

class matplotlib.text.TextWithDash(x=0, y=0, text='', color=None, verticalalignment='center', horizontalalignment='center', multialignment=None, fontproperties=None, rotation=None, linespacing=None, dashlength=0.0, dashdirection=0, dashrotation=None, dashpad=3, dashpush=0)

Bases: matplotlib.text.Text

This is basically a Text with a dash (drawn with a Line2D) before/after it. It is intended to be a drop-in replacement for Text, and should behave identically to it when dashlength = 0.0.

The dash always comes between the point specified by set_position() and the text. When a dash exists, the text alignment arguments (horizontalalignment, verticalalignment) are ignored.

dashlength is the length of the dash in canvas units. (default = 0.0).

dashdirection is one of 0 or 1, where 0 draws the dash after the text and 1 before. (default = 0).

dashrotation specifies the rotation of the dash, and should generally stay None. In this case get_dashrotation() returns get_rotation(). (i.e., the dash takes its rotation from the text's rotation). Because the text center is projected onto the dash, major deviations in the rotation cause what may be considered visually unappealing results. (default = None)

dashpad is a padding length to add (or subtract) space between the text and the dash, in canvas units. (default = 3)

dashpush "pushes" the dash and text away from the point specified by set_position() by the amount in canvas units. (default = 0)

Note

The alignment of the two objects is based on the bounding box of the Text, as obtained by get_window_extent(). This, in turn, appears to depend on the font metrics as given by the rendering backend. Hence the quality of the "centering" of the label text with respect to the dash varies depending on the backend used.

Note

I'm not sure that I got the get_window_extent() right, or whether that's sufficient for providing the object bounding box.

draw(renderer)

Draw the TextWithDash object to the given renderer.

get_dashdirection()

Get the direction dash. 1 is before the text and 0 is after.

get_dashlength()

Get the length of the dash.

get_dashpad()

Get the extra spacing between the dash and the text, in canvas units.

get_dashpush()

Get the extra spacing between the dash and the specified text position, in canvas units.

get_dashrotation()

Get the rotation of the dash in degrees.

get_figure()

return the figure instance the artist belongs to

get_position()

Return the position of the text as a tuple (x, y)

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_unitless_position()

Return the unitless position of the text as a tuple (x, y)

get_window_extent(renderer=None)

Return a Bbox object 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.

renderer defaults to the _renderer attribute of the text object. This is not assigned until the first execution of draw(), so you must use this kwarg if you want to call get_window_extent() prior to the first draw(). For getting web page regions, it is simpler to call the method after saving the figure.

set_dashdirection(dd)

Set the direction of the dash following the text. 1 is before the text and 0 is after. The default is 0, which is what you'd want for the typical case of ticks below and on the left of the figure.

ACCEPTS: int (1 is before, 0 is after)

set_dashlength(dl)

Set the length of the dash.

ACCEPTS: float (canvas units)

set_dashpad(dp)

Set the "pad" of the TextWithDash, which is the extra spacing between the dash and the text, in canvas units.

ACCEPTS: float (canvas units)

set_dashpush(dp)

Set the "push" of the TextWithDash, which is the extra spacing between the beginning of the dash and the specified position.

ACCEPTS: float (canvas units)

set_dashrotation(dr)

Set the rotation of the dash, in degrees

ACCEPTS: float (degrees)

set_figure(fig)

Set the figure instance the artist belong to.

ACCEPTS: a matplotlib.figure.Figure instance

set_position(xy)

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

ACCEPTS: (x, y)

set_transform(t)

Set the matplotlib.transforms.Transform instance used by this artist.

ACCEPTS: a matplotlib.transforms.Transform instance

set_x(x)

Set the x position of the TextWithDash.

ACCEPTS: float

set_y(y)

Set the y position of the TextWithDash.

ACCEPTS: float

update_coords(renderer)

Computes the actual x, y coordinates for text based on the input x, y and the dashlength. Since the rotation is with respect to the actual canvas's coordinates we need to map back and forth.

matplotlib.text.get_rotation(rotation)

Return the text angle as float. The returned angle is between 0 and 360 deg.

rotation may be 'horizontal', 'vertical', or a numeric value in degrees.