`tripcolor`

Color an irregular set of points by triangulating them and shading each triangle. Good for continuous fields over scattered data without an explicit grid.

Matplotlib: Axes.tripcolor.

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

Coordinates

Key	Required	Meaning
`x`	yes¹	Point x
`y`	yes¹	Point y
`z`	yes	Value per point (mapped through `cmap`)

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

Style

Key	Type	Purpose
`cmap`	string	Colormap
`vmin` / `vmax`	float	Color scale limits
`shading`	string	`"flat"` (per triangle) or `"gouraud"` (smooth)
`space`	string	`axes` (default) or `data` triangulation — see Notes
`alpha`	0–1	Opacity
`zorder`	number	Draw order

Any other Axes.tripcolor keyword is also accepted.

Example

- name: tri
  data:
    - source: df
  axes: ax
  method: tripcolor
  coordinates:
    x: {expr: xx}
    y: {expr: yy}
    z: {expr: LogL}
  style:
    cmap: jarvis_rainbow2_r
    shading: gouraud
  colorbar: axc

Notes

By default tripcolor triangulates in axes space, which keeps triangles undistorted under log-scaled axes. Force data-space triangulation with style: {space: data} (see also tripcolor_axes, which always uses axes space).
Triangles touching a non-finite z are masked (leaving holes); add - filter: "np.isfinite(z0)" upstream if you prefer to drop them.