multipleComp function

Multiple Comparisons

Calculates and prints the estimate, multiple 95% confidence intervals; unadjusted, Tukey and Bonferroni p-values for all possible differences in means in a one-way ANOVA.

multipleComp(fit, conf.level = 0.95, FUN = identity)

Arguments

• fit: output from the command 'lm()'.
• conf.level: confidence level for the confidence interval, expressed as a percentage.
• FUN: optional function to be applied to estimates and confidence intervals. Typically for backtransformation operations.

Returns

Returns a list of estimates, confidence intervals and p-values.

Examples

## computer data
data(computer.df)
fit = lm(score ~ factor(selfassess), data = computer.df)
multipleComp(fit)

## butterfat data
data("butterfat.df")
fit <- lm(log(Butterfat) ~ Breed, data=butterfat.df)
multipleComp(fit, FUN=exp)