Diagnostic plots for an ols fit — plot.ols • roadrunner

Four diagnostic panels modelled on stats::plot.lm(): residuals vs fitted, normal Q-Q of standardized residuals, scale-location, and residuals vs leverage with Cook's-distance contours.

Usage

# S3 method for class 'ols'
plot(x, which = 1:4, id.n = 3L, ...)

Arguments

x: A fitted object of class "ols".
which: Integer subset of 1:4 selecting which panels to draw. Default 1:4.
id.n: Number of extreme points to label per panel (default 3; set 0 to suppress).
...: Further graphical parameters passed to the underlying plot() calls.

Value

Invisibly returns x.

Examples

if (FALSE) { # \dontrun{
  fit <- ols(mpg ~ wt + hp, data = mtcars)
  plot(fit)
} # }