anova_plot: ANOVA Plot

In jasonmoy28/psycModel: Integrated Toolkit for Psychological Analysis and Modeling in R

ANOVA Plot

Description

Plot categorical variable with barplot. Continuous moderator are plotted at ± 1 SD from the mean.

Usage

anova_plot(model, predictor = NULL, graph_label_name = NULL, y_lim = NULL)

Arguments

model	fitted model (usually lm or aov object). Variables must be converted to correct data type before fitting the model. Specifically, continuous variables must be converted to type numeric and categorical variables to type factor.
predictor	predictor variable. Must specified for non-interaction plot and must not specify for interaction plot.
graph_label_name	vector or function. Vector should be passed in the form of c(response_var, predict_var1, predict_var2, ...). Function should be passed as a switch function that return the label based on the name passed (e.g., a switch function)
y_lim	the plot's upper and lower limit for the y-axis. Length of 2. Example: c(lower_limit, upper_limit)

Value

a ggplot object

Examples

# Main effect plot with 1 categorical variable
fit_1 = lavaan::HolzingerSwineford1939 %>% 
  dplyr::mutate(school = as.factor(school)) %>% 
  lm(data = ., grade ~ school)
anova_plot(fit_1,predictor = school)

# Interaction effect plot with 2 categorical variables 
fit_2 = lavaan::HolzingerSwineford1939 %>% 
  dplyr::mutate(dplyr::across(c(school,sex),as.factor)) %>% 
  lm(data = ., grade ~ school*sex)
anova_plot(fit_2)

# Interaction effect plot with 1 categorical variable and 1 continuous variable
fit_3 = lavaan::HolzingerSwineford1939 %>% 
  dplyr::mutate(school = as.factor(school)) %>% 
  dplyr::mutate(ageyr = as.numeric(ageyr)) %>% 
  lm(data = ., grade ~ ageyr*school)
anova_plot(fit_3)

jasonmoy28/psycModel documentation built on Sept. 6, 2024, 11:45 a.m.