broom (version 0.3.7)

anova_tidiers: Tidying methods for anova and AOV objects

Description

Tidies the result of an analysis of variance into an ANOVA table. Only a tidy method is provided, not an augment or glance method.

Usage

## S3 method for class 'anova':
tidy(x, ...)
## S3 method for class 'aov':
tidy(x, ...)
## S3 method for class 'aovlist':
tidy(x, ...)

Arguments

x

An object of class "anova", "aov", or "aovlist"

...

extra arguments (not used)

Value

• A data.frame with columns
• term
  Term within the model, or "Residuals"
• df
  Degrees of freedom used by this term in the model
• sumsq
  Sum of squares explained by this term
• meansq
  Mean of sum of squares among degrees of freedom
• statistic
  F statistic
• p.value
  P-value from F test
• In the case of an "aovlist" object, there is also a stratum column describing the error stratum

Details

Note that the "term" column of an ANOVA table can come with leading or trailing whitespace, which this tidying method trims.

Examples

a <- anova(lm(mpg ~ wt + qsec + disp, mtcars))
tidy(a)

a <- aov(mpg ~ wt + qsec + disp, mtcars)
tidy(a)

al <- aov(mpg ~ wt + qsec + Error(disp / am), mtcars)
tidy(al)