`quiver`

Draw a field of arrows (vectors) at given positions.

Matplotlib: Axes.quiver. Coordinates are forwarded as quiver(x, y, u, v, ...).

Axes: rectangular (ax).

Coordinates

Key	Required	Meaning
`x`	yes	Arrow base x positions
`y`	yes	Arrow base y positions
`u`	yes	Arrow x-components
`v`	yes	Arrow y-components

Style

Key	Type	Purpose
`scale`	float	Inverse arrow length (smaller → longer arrows)
`angles`	string	`"uv"` or `"xy"`
`units`	string	Arrow dimension units, e.g. `"xy"`, `"width"`
`width`	float	Shaft width
`color`	color	Arrow color
`pivot`	string	`"tail"`, `"mid"`, `"tip"`
`zorder`	number	Draw order

Any other Axes.quiver keyword is also accepted.

Example

- name: gradient
  data:
    - source: field
  axes: ax
  method: quiver
  coordinates:
    x: {expr: x}
    y: {expr: y}
    u: {expr: dx}
    v: {expr: dy}
  style:
    angles: xy
    scale: 20
    color: black