Shades a grid of predictions to show a two-dimensional classifier's
decision regions; overlay geom_point() for the training data.
geom_decision_boundary(mapping = NULL, data = NULL, alpha = NULL)
Arguments
- mapping, data
Standard layer overrides. Map the grid coordinates to
x/y and the predicted class to color.
- alpha
Region opacity.
Value
A Layer to add with +.
Examples
g <- expand.grid(x = seq(0, 1, 0.05), y = seq(0, 1, 0.05))
g$cls <- ifelse(g$x + g$y > 1, "a", "b")
ggnext(g, aes(x, y, color = cls)) + geom_decision_boundary()
#> <ggnext plot>
#> data: 441 x 3
#> aes: x = x, y = y, color = cls
#> layers: 1
#> coord: cartesian
#> mode: static