prepanel.ci: Prepanel for ciplot

View source: R/panel.ci.R

prepanel.ciR Documentation

Prepanel for ciplot

Description

Prepanel for ciplot

Usage

prepanel.ci(x, y, lower, upper, subscripts, groups = NULL, ...)

Arguments

x, y

x and y values, numeric or factor

lower

lower confidence limits

upper

upper confidence limits

groups, subscripts

See xyplot. Whenever appropriate, calculations are done separately for each group and then combined.

...

other arguments, usually ignored

Examples

mod <- lm(Petal.Width ~ Petal.Length * Species, data = iris)
newdat <- expand.grid(
  Petal.Length = seq(1, 7, by = 0.1),
  Species = c("setosa", "versicolor", "virginica")
)
pred <- predict(mod, newdat, interval = "confidence")
dd <- cbind(newdat, pred)

xyplot(
  fit ~ Petal.Length,
  groups = Species, data = dd,
  prepanel = prepanel.ci,
  ylab = "Petal Width",
  xlab = "Petal Length",
  lower = dd$lwr, upper = dd$upr, alpha = 0.3,
  panel = function(...) {
    panel.ci(..., grid = TRUE)
    panel.xyplot(type = "l", ...)
  }
)


tactile documentation built on May 31, 2023, 9:47 p.m.