matplotlib.patches.FancyArrowPatch

class matplotlib.patches.FancyArrowPatch(posA=None, posB=None, path=None, arrowstyle='simple', arrow_transmuter=None, connectionstyle='arc3', connector=None, patchA=None, patchB=None, shrinkA=2, shrinkB=2, mutation_scale=1, mutation_aspect=None, dpi_cor=1, **kwargs) [source]

Bases: matplotlib.patches.Patch

A fancy arrow patch. It draws an arrow using the ArrowStyle.

The head and tail positions are fixed at the specified start and end points of the arrow, but the size and shape (in display coordinates) of the arrow does not change when the axis is moved or zoomed.

There are two ways for defining an arrow:

• If posA and posB are given, a path connecting two points is created according to connectionstyle. The path will be clipped with patchA and patchB and further shrunken by shrinkA and shrinkB. An arrow is drawn along this resulting path using the arrowstyle parameter.
• Alternatively if path is provided, an arrow is drawn along this path and patchA, patchB, shrinkA, and shrinkB are ignored.

Parameters:

posA, posB(float, float), optional (default: None) (x, y) coordinates of arrow tail and arrow head respectively. pathPath, optional (default: None) If provided, an arrow is drawn along this path and patchA, patchB, shrinkA, and shrinkB are ignored. arrowstylestr or ArrowStyle, optional (default: 'simple') Describes how the fancy arrow will be drawn. It can be string of the available arrowstyle names, with optional comma-separated attributes, or an ArrowStyle instance. The optional attributes are meant to be scaled with the mutation_scale. The following arrow styles are available: Class Name Attrs Curve - None CurveB -> head_length=0.4, head_width=0.2 BracketB -[ widthB=1.0, lengthB=0.2, angleB=None CurveFilledB -|> head_length=0.4, head_width=0.2 CurveA <- head_length=0.4, head_width=0.2 CurveAB <-> head_length=0.4, head_width=0.2 CurveFilledA <|- head_length=0.4, head_width=0.2 CurveFilledAB <|-|> head_length=0.4, head_width=0.2 BracketA ]- widthA=1.0, lengthA=0.2, angleA=None BracketAB ]-[ widthA=1.0, lengthA=0.2, angleA=None, widthB=1.0, lengthB=0.2, angleB=None Fancy fancy head_length=0.4, head_width=0.4, tail_width=0.4 Simple simple head_length=0.5, head_width=0.5, tail_width=0.2 Wedge wedge tail_width=0.3, shrink_factor=0.5 BarAB |-| widthA=1.0, angleA=None, widthB=1.0, angleB=None arrow_transmuter Ignored. connectionstylestr or ConnectionStyle or None, optional (default: 'arc3') Describes how posA and posB are connected. It can be an instance of the ConnectionStyle class or a string of the connectionstyle name, with optional comma-separated attributes. The following connection styles are available: Class Name Attrs Angle angle angleA=90, angleB=0, rad=0.0 Angle3 angle3 angleA=90, angleB=0 Arc arc angleA=0, angleB=0, armA=None, armB=None, rad=0.0 Arc3 arc3 rad=0.0 Bar bar armA=0.0, armB=0.0, fraction=0.3, angle=None connector Ignored. patchA, patchBPatch, optional (default: None) Head and tail patch respectively. matplotlib.patch.Patch instance. shrinkA, shrinkBfloat, optional (default: 2) Shrinking factor of the tail and head of the arrow respectively. mutation_scalefloat, optional (default: 1) Value with which attributes of arrowstyle (e.g., head_length) will be scaled. mutation_aspectNone or float, optional (default: None) The height of the rectangle will be squeezed by this value before the mutation and the mutated box will be stretched by the inverse of it. dpi_corfloat, optional (default: 1) dpi_cor is currently used for linewidth-related things and shrink factor. Mutation scale is affected by this.

Other Parameters:

**kwargsPatch properties, optional Here is a list of available Patch properties: 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 antialiased or aa unknown capstyle {'butt', 'round', 'projecting'} clip_box Bbox clip_on bool clip_path Patch or (Path, Transform) or None color color contains callable edgecolor or ec color or None or 'auto' facecolor or fc color or None figure Figure fill bool gid str hatch {'/', '\', '|', '-', '+', 'x', 'o', 'O', '.', '*'} in_layout bool joinstyle {'miter', 'round', 'bevel'} label object linestyle or ls {'-', '--', '-.', ':', '', (offset, on-off-seq), ...} linewidth or lw float or None path_effects AbstractPathEffect picker None or bool or float or callable rasterized bool or None sketch_params (scale: float, length: float, randomness: float) snap bool or None transform Transform url str visible bool zorder float In contrast to other patches, the default capstyle and joinstyle for FancyArrowPatch are set to "round".

draw(self, renderer) [source]

Draw to the given renderer.

get_arrowstyle(self) [source]

Return the arrowstyle object.

get_connectionstyle(self) [source]

Return the ConnectionStyle instance.

get_dpi_cor(self) [source]

dpi_cor is currently used for linewidth-related things and shrink factor. Mutation scale is affected by this.

Returns:	dpi_corscalar

get_mutation_aspect(self) [source]

Return the aspect ratio of the bbox mutation.

get_mutation_scale(self) [source]

Return the mutation scale.

Returns:	scalescalar

get_path(self) [source]

Return the path of the arrow in the data coordinates. Use get_path_in_displaycoord() method to retrieve the arrow path in display coordinates.

get_path_in_displaycoord(self) [source]

Return the mutated path of the arrow in display coordinates.

set_arrowstyle(self, arrowstyle=None, **kw) [source]

Set the arrow style. Old attributes are forgotten. Without arguments (or with arrowstyle=None) returns available box styles as a list of strings.

Parameters:	arrowstyleNone, ArrowStyle, str, optional (default: None) Can be a string with arrowstyle name with optional comma-separated attributes, e.g.: set_arrowstyle("Fancy,head_length=0.2") Alternatively attributes can be provided as keywords, e.g.: set_arrowstyle("fancy", head_length=0.2)

set_connectionstyle(self, connectionstyle, **kw) [source]

Set the connection style. Old attributes are forgotten.

Parameters:

connectionstylestr or ConnectionStyle or None, optional Can be a string with connectionstyle name with optional comma-separated attributes, e.g.: set_connectionstyle("arc,angleA=0,armA=30,rad=10") Alternatively, the attributes can be provided as keywords, e.g.: set_connectionstyle("arc", angleA=0,armA=30,rad=10) Without any arguments (or with connectionstyle=None), return available styles as a list of strings.

set_dpi_cor(self, dpi_cor) [source]

dpi_cor is currently used for linewidth-related things and shrink factor. Mutation scale is affected by this.

Parameters:	dpi_corscalar

set_mutation_aspect(self, aspect) [source]

Set the aspect ratio of the bbox mutation.

Parameters:	aspectscalar

set_mutation_scale(self, scale) [source]

Set the mutation scale.

Parameters:	scalescalar

set_patchA(self, patchA) [source]

Set the tail patch.

Parameters:	patchAPatch matplotlib.patch.Patch instance.

set_patchB(self, patchB) [source]

Set the head patch.

Parameters:	patchBPatch matplotlib.patch.Patch instance.

set_positions(self, posA, posB) [source]

Set the begin and end positions of the connecting path.

Parameters:	posA, posBNone, tuple (x, y) coordinates of arrow tail and arrow head respectively. If None use current value.

Examples using matplotlib.patches.FancyArrowPatch