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Set curvature for multiple edges at once

Source: R/dagify.R
set_curve_edges.Rd

set_curve_edges() replaces all edge curvatures on a dagitty or tidy_dagitty object from a data frame. Use curve_edge() to set a single edge.

Usage

set_curve_edges(.dag, edges)

Arguments

.dag

A dagitty or tidy_dagitty object.

edges

A data frame with columns from, to, and curvature.

Value

The modified .dag object with updated curvatures.

Curvature sign convention

The curvature value is passed directly to the active edge rendering engine. The ggraph engine (default) and ggarrow engine interpret the sign differently:

  • ggraph: positive curvature curves above (to the left of) a left-to-right edge.

  • ggarrow / grid: positive curvature curves below (to the right of) a left-to-right edge, following grid::curveGrob() convention.

This means the same curvature value will render as a mirror image depending on the engine. ggdag does not negate or transform the value; each engine uses its native convention.

Examples

dag <- dagify(y ~ x + m, m ~ x)
edges <- data.frame(
  from = c("x", "m"),
  to = c("y", "y"),
  curvature = c(0.3, -0.4)
)
dag <- set_curve_edges(dag, edges)