/Matplotlib 3.0


class matplotlib.lines.Line2D(xdata, ydata, linewidth=None, linestyle=None, color=None, marker=None, markersize=None, markeredgewidth=None, markeredgecolor=None, markerfacecolor=None, markerfacecoloralt='none', fillstyle=None, antialiased=None, dash_capstyle=None, solid_capstyle=None, dash_joinstyle=None, solid_joinstyle=None, pickradius=5, drawstyle=None, markevery=None, **kwargs) [source]

Bases: matplotlib.artist.Artist

A line - the line can have both a solid linestyle connecting all the vertices, and a marker at each vertex. Additionally, the drawing of the solid line is influenced by the drawstyle, e.g., one can create "stepped" lines in various styles.

Create a Line2D instance with x and y data in sequences xdata, ydata.

The kwargs are Line2D 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
animated bool
antialiased bool
clip_box Bbox
clip_on bool
clip_path [(Path, Transform) | Patch | None]
color color
contains callable
dash_capstyle {'butt', 'round', 'projecting'}
dash_joinstyle {'miter', 'round', 'bevel'}
dashes sequence of floats (on/off ink in points) or (None, None)
drawstyle {'default', 'steps', 'steps-pre', 'steps-mid', 'steps-post'}
figure Figure
fillstyle {'full', 'left', 'right', 'bottom', 'top', 'none'}
gid str
in_layout bool
label object
linestyle {'-', '--', '-.', ':', '', (offset, on-off-seq), ...}
linewidth float
marker unknown
markeredgecolor color
markeredgewidth float
markerfacecolor color
markerfacecoloralt color
markersize float
markevery unknown
path_effects AbstractPathEffect
picker float or callable[[Artist, Event], Tuple[bool, dict]]
pickradius float
rasterized bool or None
sketch_params (scale: float, length: float, randomness: float)
snap bool or None
solid_capstyle {'butt', 'round', 'projecting'}
solid_joinstyle {'miter', 'round', 'bevel'}
transform matplotlib.transforms.Transform
url str
visible bool
xdata 1D array
ydata 1D array
zorder float

See set_linestyle() for a description of the line styles, set_marker() for a description of the markers, and set_drawstyle() for a description of the draw styles.


The Axes instance the artist resides in, or None.

contains(mouseevent) [source]

Test whether the mouse event occurred on the line. The pick radius determines the precision of the location test (usually within five points of the value). Use get_pickradius() or set_pickradius() to view or modify it.

Returns True if any values are within the radius along with {'ind': pointlist}, where pointlist is the set of points within the radius.

TODO: sort returned indices by distance

draw(renderer) [source]

draw the Line with renderer unless visibility is False

drawStyleKeys = ['default', 'steps-mid', 'steps-pre', 'steps-post', 'steps']
drawStyles = {'default': '_draw_lines', 'steps': '_draw_steps_pre', 'steps-mid': '_draw_steps_mid', 'steps-post': '_draw_steps_post', 'steps-pre': '_draw_steps_pre'}
fillStyles = ('full', 'left', 'right', 'bottom', 'top', 'none')
filled_markers = ('o', 'v', '^', '<', '>', '8', 's', 'p', '*', 'h', 'H', 'D', 'd', 'P', 'X')
get_aa(*args, **kwargs)

alias for get_antialiased

get_antialiased() [source]
get_c(*args, **kwargs)

alias for get_color

get_color() [source]
get_dash_capstyle() [source]

Get the cap style for dashed linestyles

get_dash_joinstyle() [source]

Get the join style for dashed linestyles

get_data(orig=True) [source]

Return the xdata, ydata.

If orig is True, return the original data.

get_drawstyle() [source]
get_fillstyle() [source]

return the marker fillstyle

get_linestyle() [source]
get_linewidth() [source]
get_ls(*args, **kwargs)

alias for get_linestyle

get_lw(*args, **kwargs)

alias for get_linewidth

get_marker() [source]
get_markeredgecolor() [source]
get_markeredgewidth() [source]
get_markerfacecolor() [source]
get_markerfacecoloralt() [source]
get_markersize() [source]
get_markevery() [source]

return the markevery setting

get_mec(*args, **kwargs)

alias for get_markeredgecolor

get_mew(*args, **kwargs)

alias for get_markeredgewidth

get_mfc(*args, **kwargs)

alias for get_markerfacecolor

get_mfcalt(*args, **kwargs)

alias for get_markerfacecoloralt

get_ms(*args, **kwargs)

alias for get_markersize

get_path() [source]

Return the Path object associated with this line.

get_pickradius() [source]

return the pick radius used for containment tests

get_solid_capstyle() [source]

Get the cap style for solid linestyles

get_solid_joinstyle() [source]

Get the join style for solid linestyles

get_window_extent(renderer) [source]

Get the axes bounding box in display space. Subclasses should override for inclusion in the bounding box "tight" calculation. Default is to return an empty bounding box at 0, 0.

Be careful when using this function, the results will not update if the artist window extent of the artist changes. The extent can change due to any changes in the transform stack, such as changing the axes limits, the figure size, or the canvas used (as is done when saving a figure). This can lead to unexpected behavior where interactive figures will look fine on the screen, but will save incorrectly.

get_xdata(orig=True) [source]

Return the xdata.

If orig is True, return the original data, else the processed data.

get_xydata() [source]

Return the xy data as a Nx2 numpy array.

get_ydata(orig=True) [source]

Return the ydata.

If orig is True, return the original data, else the processed data.

is_dashed() [source]

return True if line is dashstyle

lineStyles = {'': '_draw_nothing', ' ': '_draw_nothing', '-': '_draw_solid', '--': '_draw_dashed', '-.': '_draw_dash_dot', ':': '_draw_dotted', 'None': '_draw_nothing'}
markers = {'.': 'point', ',': 'pixel', 'o': 'circle', 'v': 'triangle_down', '^': 'triangle_up', '<': 'triangle_left', '>': 'triangle_right', '1': 'tri_down', '2': 'tri_up', '3': 'tri_left', '4': 'tri_right', '8': 'octagon', 's': 'square', 'p': 'pentagon', '*': 'star', 'h': 'hexagon1', 'H': 'hexagon2', '+': 'plus', 'x': 'x', 'D': 'diamond', 'd': 'thin_diamond', '|': 'vline', '_': 'hline', 'P': 'plus_filled', 'X': 'x_filled', 0: 'tickleft', 1: 'tickright', 2: 'tickup', 3: 'tickdown', 4: 'caretleft', 5: 'caretright', 6: 'caretup', 7: 'caretdown', 8: 'caretleftbase', 9: 'caretrightbase', 10: 'caretupbase', 11: 'caretdownbase', 'None': 'nothing', None: 'nothing', ' ': 'nothing', '': 'nothing'}
recache(always=False) [source]
recache_always() [source]
set_aa(*args, **kwargs)

alias for set_antialiased

set_antialiased(b) [source]

Set whether to use antialiased rendering.

b : bool
set_c(*args, **kwargs)

alias for set_color

set_color(color) [source]

Set the color of the line

color : color
set_dash_capstyle(s) [source]

Set the cap style for dashed linestyles.

s : {'butt', 'round', 'projecting'}
set_dash_joinstyle(s) [source]

Set the join style for dashed linestyles.

s : {'miter', 'round', 'bevel'}
set_dashes(seq) [source]

Set the dash sequence, sequence of dashes with on off ink in points. If seq is empty or if seq = (None, None), the linestyle will be set to solid.

seq : sequence of floats (on/off ink in points) or (None, None)
set_data(*args) [source]

Set the x and y data

ACCEPTS: 2D array (rows are x, y) or two 1D arrays

set_drawstyle(drawstyle) [source]

Set the drawstyle of the plot

'default' connects the points with lines. The steps variants produce step-plots. 'steps' is equivalent to 'steps-pre' and is maintained for backward-compatibility.

drawstyle : {'default', 'steps', 'steps-pre', 'steps-mid', 'steps-post'}
set_fillstyle(fs) [source]

Set the marker fill style; 'full' means fill the whole marker. 'none' means no filling; other options are for half-filled markers.

fs : {'full', 'left', 'right', 'bottom', 'top', 'none'}
set_linestyle(ls) [source]

Set the linestyle of the line (also accepts drawstyles, e.g., 'steps--')

linestyle description
'-' or 'solid' solid line
'--' or 'dashed' dashed line
'-.' or 'dashdot' dash-dotted line
':' or 'dotted' dotted line
'None' draw nothing
' ' draw nothing
'' draw nothing

'steps' is equivalent to 'steps-pre' and is maintained for backward-compatibility.

Alternatively a dash tuple of the following form can be provided:

(offset, onoffseq),

where onoffseq is an even length tuple of on and off ink in points.

See also

To set the drawing style (stepping) of the plot.
ls : {'-', '--', '-.', ':', '', (offset, on-off-seq), ...}

The line style.

set_linewidth(w) [source]

Set the line width in points

w : float
set_ls(*args, **kwargs)

alias for set_linestyle

set_lw(*args, **kwargs)

alias for set_linewidth

set_marker(marker) [source]

Set the line marker.

marker: marker style

See markers for full description of possible arguments.

set_markeredgecolor(ec) [source]

Set the marker edge color.

ec : color
set_markeredgewidth(ew) [source]

Set the marker edge width in points.

ew : float
set_markerfacecolor(fc) [source]

Set the marker face color.

fc : color
set_markerfacecoloralt(fc) [source]

Set the alternate marker face color.

fc : color
set_markersize(sz) [source]

Set the marker size in points.

sz : float
set_markevery(every) [source]

Set the markevery property to subsample the plot when using markers.

e.g., if every=5, every 5-th marker will be plotted.

every: None or int or (int, int) or slice or List[int] or float or (float, float)

Which markers to plot.

  • every=None, every point will be plotted.
  • every=N, every N-th marker will be plotted starting with marker 0.
  • every=(start, N), every N-th marker, starting at point start, will be plotted.
  • every=slice(start, end, N), every N-th marker, starting at point start, up to but not including point end, will be plotted.
  • every=[i, j, m, n], only markers at points i, j, m, and n will be plotted.
  • every=0.1, (i.e. a float) then markers will be spaced at approximately equal distances along the line; the distance along the line between markers is determined by multiplying the display-coordinate distance of the axes bounding-box diagonal by the value of every.
  • every=(0.5, 0.1) (i.e. a length-2 tuple of float), the same functionality as every=0.1 is exhibited but the first marker will be 0.5 multiplied by the display-cordinate-diagonal-distance along the line.


Setting the markevery property will only show markers at actual data points. When using float arguments to set the markevery property on irregularly spaced data, the markers will likely not appear evenly spaced because the actual data points do not coincide with the theoretical spacing between markers.

When using a start offset to specify the first marker, the offset will be from the first data point which may be different from the first the visible data point if the plot is zoomed in.

If zooming in on a plot when using float arguments then the actual data points that have markers will change because the distance between markers is always determined from the display-coordinates axes-bounding-box-diagonal regardless of the actual axes data limits.

set_mec(*args, **kwargs)

alias for set_markeredgecolor

set_mew(*args, **kwargs)

alias for set_markeredgewidth

set_mfc(*args, **kwargs)

alias for set_markerfacecolor

set_mfcalt(*args, **kwargs)

alias for set_markerfacecoloralt

set_ms(*args, **kwargs)

alias for set_markersize

set_picker(p) [source]

Sets the event picker details for the line.

p : float or callable[[Artist, Event], Tuple[bool, dict]]

If a float, it is used as the pick radius in points.

set_pickradius(d) [source]

Set the pick radius used for containment tests.

d : float

Pick radius, in points.

set_solid_capstyle(s) [source]

Set the cap style for solid linestyles.

s : {'butt', 'round', 'projecting'}
set_solid_joinstyle(s) [source]

Set the join style for solid linestyles.

s : {'miter', 'round', 'bevel'}
set_transform(t) [source]

set the Transformation instance used by this artist

t : matplotlib.transforms.Transform
set_xdata(x) [source]

Set the data array for x.

x : 1D array
set_ydata(y) [source]

Set the data array for y.

y : 1D array
update_from(other) [source]

copy properties from other to self

validCap = ('butt', 'round', 'projecting')
validJoin = ('miter', 'round', 'bevel')
zorder = 2

Examples using matplotlib.lines.Line2D

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Licensed under the Matplotlib License Agreement.