position-identity
Identity position adjustment: no offset applied to any row.
Typically set on a layer as position: "identity" rather than constructed directly; the constructor exists for symmetry with the other positions.
Usage
position-identity()Returns
Position dictionary with name: "identity", consumed by plot.
Examples
Explicit identity position on a scatter, equivalent to the default behaviour of most geoms.
#let d = (
(x: 1, y: 2),
(x: 2, y: 4),
(x: 3, y: 3),
)
#plot(
data: d,
mapping: aes(x: "x", y: "y"),
layers: (geom-point(size: 3pt, position: "identity"),),
width: 10cm,
height: 6cm,
)
Use identity on geom-col when you have pre-computed bar heights you want drawn unchanged, even if a fill mapping is present.
#let d = (
(q: "Q1", grp: "a", y: 3),
(q: "Q1", grp: "b", y: 5),
(q: "Q2", grp: "a", y: 4),
(q: "Q2", grp: "b", y: 2),
)
#plot(
data: d,
mapping: aes(x: "q", y: "y", fill: "grp"),
layers: (geom-col(position: "identity", alpha: 0.6),),
width: 10cm,
height: 6cm,
)
