matplotlib.axes.Axes.tripcolor

Axes.tripcolor(*args, alpha=1.0, norm=None, cmap=None, vmin=None, vmax=None, shading='flat', facecolors=None, **kwargs)

Create a pseudocolor plot of an unstructured triangular grid.

Call signatures:

tripcolor(triangulation, c, *, ...)
tripcolor(x, y, c, *, [triangles=triangles], [mask=mask], ...)

The triangular grid can be specified either by passing a Triangulation object as the first parameter, or by passing the points x, y and optionally the triangles and a mask. See Triangulation for an explanation of these parameters.

It is possible to pass the triangles positionally, i.e. tripcolor(x, y, triangles, c, ...). However, this is discouraged. For more clarity, pass triangles via keyword argument.

If neither of triangulation or triangles are given, the triangulation is calculated on the fly. In this case, it does not make sense to provide colors at the triangle faces via c or facecolors because there are multiple possible triangulations for a group of points and you don't know which triangles will be constructed.

Parameters:

triangulationTriangulation

An already created triangular grid.

x, y, triangles, mask

Parameters defining the triangular grid. See Triangulation. This is mutually exclusive with specifying triangulation.

carray-like

The color values, either for the points or for the triangles. Which one is automatically inferred from the length of c, i.e. does it match the number of points or the number of triangles. If there are the same number of points and triangles in the triangulation it is assumed that color values are defined at points; to force the use of color values at triangles use the keyword argument facecolors=c instead of just c. This parameter is position-only.

facecolorsarray-like, optional

Can be used alternatively to c to specify colors at the triangle faces. This parameter takes precedence over c.

shading{'flat', 'gouraud'}, default: 'flat'

If 'flat' and the color values c are defined at points, the color values used for each triangle are from the mean c of the triangle's three points. If shading is 'gouraud' then color values must be defined at points.

cmapstr or Colormap, default: rcParams["image.cmap"] (default: 'viridis')

The Colormap instance or registered colormap name used to map scalar data to colors.

normstr or Normalize, optional

The normalization method used to scale scalar data to the [0, 1] range before mapping to colors using cmap. By default, a linear scaling is used, mapping the lowest value to 0 and the highest to 1.

If given, this can be one of the following:

• An instance of Normalize or one of its subclasses (see Colormap normalization).

• A scale name, i.e. one of "linear", "log", "symlog", "logit", etc. For a list of available scales, call matplotlib.scale.get_scale_names(). In that case, a suitable Normalize subclass is dynamically generated and instantiated.

vmin, vmaxfloat, optional

When using scalar data and no explicit norm, vmin and vmax define the data range that the colormap covers. By default, the colormap covers the complete value range of the supplied data. It is an error to use vmin/vmax when a norm instance is given (but using a str norm name together with vmin/vmax is acceptable).

colorizerColorizer or None, default: None

The Colorizer object used to map color to data. If None, a Colorizer object is created from a norm and cmap.

Returns:

PolyCollection or TriMesh

The result depends on shading: For shading='flat' the result is a PolyCollection, for shading='gouraud' the result is a TriMesh.

Other Parameters:

**kwargsCollection 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 and two offsets from the bottom left corner of the image
alpha	array-like or float or None
animated	bool
antialiased or aa or antialiaseds	bool or list of bools
array	array-like or None
capstyle	CapStyle or {'butt', 'projecting', 'round'}
clim	(vmin: float, vmax: float)
clip_box	BboxBase or None
clip_on	bool
clip_path	Patch or (Path, Transform) or None
cmap	Colormap or str or None
color	color or list of RGBA tuples
edgecolor or ec or edgecolors	color or list of color or 'face'
facecolor or facecolors or fc	color or list of color
figure	Figure or SubFigure
gid	str
hatch	{'/', '\', '|', '-', '+', 'x', 'o', 'O', '.', '*'}
hatch_linewidth	unknown
in_layout	bool
joinstyle	JoinStyle or {'miter', 'round', 'bevel'}
label	object
linestyle or dashes or linestyles or ls	str or tuple or list thereof
linewidth or linewidths or lw	float or list of floats
mouseover	bool
norm	Normalize or str or None
offset_transform or transOffset	Transform
offsets	(N, 2) or (2,) array-like
path_effects	list of AbstractPathEffect
paths	unknown
picker	None or bool or float or callable
pickradius	float
rasterized	bool
sketch_params	(scale: float, length: float, randomness: float)
snap	bool or None
transform	Transform
url	str
urls	list of str or None
visible	bool
zorder	float

Examples using matplotlib.axes.Axes.tripcolor

Tripcolor Demo

Tripcolor Demo

tripcolor(x, y, z)

tripcolor(x, y, z)