tricontourf

Draw filled contours of a field defined on a triangulation of scattered points.

Matplotlib: Axes.tricontourf.

Axes: rectangular (ax) and ternary (axtri).

Coordinates

Key	Required	Meaning
x	yes¹	Point x
y	yes¹	Point y
z	yes	Value per point

¹ On a ternary axis use left / right / bottom instead of x / y.

Style

Key	Type	Purpose
levels	int or list	Number of bands, or explicit boundaries
cmap	string	Colormap
vmin / vmax	float	Color scale limits
extend	string	"neither", "min", "max", "both"
alpha	0–1	Opacity
zorder	number	Draw order

Any other Axes.tricontourf keyword is also accepted.

Example (ternary)

- name: trifill
  data:
    - source: df
  axes: axtri
  method: tricontourf
  coordinates:
    left:   {expr: a}
    right:  {expr: b}
    bottom: {expr: c}
    z:      {expr: z}
  style:
    cmap: terrain
    levels: 50
    vmin: 0.0
    vmax: 1.0
    zorder: 8
  colorbar: axc

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See also: Plot Methods index · tricontour · tripcolor