contourf

Draw filled contours of a 2D scalar field — colored bands between contour levels.

Matplotlib: Axes.contourf. The x/y/z coordinates are assembled into the Matplotlib X, Y, Z grid.

Axes: rectangular (ax).

Coordinates

Key	Required	Meaning
x	yes	Grid x positions
y	yes	Grid y positions
z	yes	Scalar field to fill

The field must be gridded. For filled contours straight from scattered points, use jpcontourf.

Style

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

Any other Axes.contourf keyword is also accepted.

Example

- name: filled
  data:
    - source: density_grid
  axes: ax
  method: contourf
  coordinates:
    x: {expr: x}
    y: {expr: y}
    z: {expr: density}
  style:
    levels: 50
    cmap: jarvis_rainbow2_r
  colorbar: axc

Notes

• Pair with contour for crisp outlines on top of the filled bands.

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See also: Plot Methods index · contour · jpcontourf · pcolormesh