tadaa_aov: Tadaa, ANOVA!

In tadaadata/tadaatoolbox: Helpers for Data Analysis and Presentation Focused on Undergrad Psychology

Description

Performs one-, two-way or factorial ANOVA with adjustable sums of squares method and optionally displays effect sizes ((partial) η^2 and Cohen's f).

Usage

tadaa_aov(
  formula,
  data = NULL,
  show_effect_size = TRUE,
  factorize = TRUE,
  type = 3,
  check_contrasts = TRUE,
  print = c("df", "console", "html", "markdown")
)

Arguments

formula	Formula for model, passed to aov.
data	Data for model.
show_effect_size	If TRUE (default), effect sizes partial eta^2 and Cohen's f are appended as columns.
factorize	If TRUE (default), non-factor independent variables will automatically converted via as.factor, so beware of your inputs.
type	Which type of SS to use. Default is 3, can also be 1 or 2.
check_contrasts	Only applies to type = 3. If TRUE (default), the contrasts of each non-ordered factor are set to "contr.sum".
print	Print method, default df: A regular data.frame. Otherwise passed to pixiedust::sprinkle_print_method for fancyness.

Details

If a specified independent variable is not properly encoded as a factor, it is automatically converted if factorize = TRUE to ensure valid results.

If type = 3 and check_contrasts = TRUE, the "contrasts" of each non-ordered factor will be checked and set to contr.sum to ensure the function yields usable results. It is highly recommended to only use check_contrasts = FALSE for debugging or educational purposes, or of you know what you're doing and using your own contrast matrix.

Value

A data.frame by default, otherwise dust object, depending on print.

See Also

Other Tadaa-functions: tadaa_chisq(), tadaa_kruskal(), tadaa_levene(), tadaa_nom(), tadaa_one_sample(), tadaa_ord(), tadaa_pairwise_tukey(), tadaa_pairwise_t(), tadaa_t.test(), tadaa_wilcoxon()

Examples

tadaa_aov(stunzahl ~ jahrgang, data = ngo)
tadaa_aov(stunzahl ~ jahrgang * geschl, data = ngo)

# Other types of sums and print options
## Not run: 
tadaa_aov(stunzahl ~ jahrgang * geschl, data = ngo, type = 1, print = "console")
tadaa_aov(stunzahl ~ jahrgang * geschl, data = ngo, type = 3, print = "console")
tadaa_aov(stunzahl ~ jahrgang * geschl,
  data = ngo,
  type = 3, check_contrasts = FALSE, print = "console"
)

## End(Not run)

tadaadata/tadaatoolbox documentation built on June 3, 2020, 10:34 a.m.