Created
September 17, 2021 20:48
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library(tidyverse) | |
library(ggdag) | |
library(patchwork) | |
data_confounder <- dagify( | |
Y ~ Z + X, | |
X ~ Z, | |
coords = list(x = c(X = 1, Y = 3, Z = 2), | |
y = c(X = 1, Y = 1, Z = 2)) | |
) %>% | |
tidy_dagitty() %>% | |
mutate(arrow_color = ifelse(name == "Z", "#F05B12", "grey80")) %>% | |
mutate(node_color = ifelse(name == "Z", TRUE, FALSE)) | |
confounder <- ggplot(data_confounder, aes(x = x, y = y, xend = xend, yend = yend)) + | |
geom_dag_edges(aes(edge_colour = arrow_color), edge_width = 1) + | |
geom_dag_point(aes(color = node_color), size = 12) + | |
geom_dag_text(data = filter(data_confounder, name != "Z"), size = 4) + | |
geom_dag_text(data = filter(data_confounder, name == "Z"), color = "white", size = 4) + | |
scale_color_manual(values = c("grey80", "#F05B12"), guide = "none") + | |
coord_cartesian(ylim = c(0.95, 2.05)) + | |
labs(title = "Confounder", subtitle = "(Fork)") + | |
theme_dag(base_family = "Assistant") + | |
theme(plot.title = element_text(hjust = 0.5, face = "bold", color = "#F05B12"), | |
plot.subtitle = element_text(hjust = 0.5, color = "#F05B12")) | |
data_mediator <- dagify( | |
Y ~ X + Z, | |
Z ~ X, | |
coords = list(x = c(X = 1, Y = 3, Z = 2), | |
y = c(X = 1, Y = 1, Z = 2)) | |
) %>% | |
tidy_dagitty() %>% | |
mutate(arrow_color = case_when( | |
name == "Z" & to == "Y" ~ "#30123B", | |
name == "X" & to == "Z" ~ "#30123B", | |
TRUE ~ "grey80")) %>% | |
mutate(node_color = ifelse(name == "Z", TRUE, FALSE)) | |
mediator <- ggplot(data_mediator, aes(x = x, y = y, xend = xend, yend = yend)) + | |
geom_dag_edges(aes(edge_colour = arrow_color), edge_width = 1) + | |
geom_dag_point(aes(color = node_color), size = 12) + | |
geom_dag_text(data = filter(data_mediator, name != "Z"), size = 4) + | |
geom_dag_text(data = filter(data_mediator, name == "Z"), color = "white", size = 4) + | |
scale_color_manual(values = c("grey80", "#30123B"), guide = "none") + | |
coord_cartesian(ylim = c(0.95, 2.05)) + | |
labs(title = "Mediator", subtitle = "(Chain)") + | |
theme_dag(base_family = "Assistant") + | |
theme(plot.title = element_text(hjust = 0.5, face = "bold", color = "#30123B"), | |
plot.subtitle = element_text(hjust = 0.5, color = "#30123B")) | |
data_collider <- dagify( | |
Y ~ X, | |
Z ~ X + Y, | |
coords = list(x = c(X = 1, Y = 3, Z = 2), | |
y = c(X = 1, Y = 1, Z = 2)) | |
) %>% | |
tidy_dagitty() %>% | |
mutate(arrow_color = ifelse(to == "Z", "#7A0403", "grey80")) %>% | |
mutate(node_color = ifelse(name == "Z", TRUE, FALSE)) | |
collider <- ggplot(data_collider, aes(x = x, y = y, xend = xend, yend = yend)) + | |
geom_dag_edges(aes(edge_colour = arrow_color), edge_width = 1) + | |
geom_dag_point(aes(color = node_color), size = 12) + | |
geom_dag_text(data = filter(data_collider, name != "Z"), size = 4) + | |
geom_dag_text(data = filter(data_collider, name == "Z"), color = "white", size = 4) + | |
scale_color_manual(values = c("grey80", "#7A0403"), guide = "none") + | |
coord_cartesian(ylim = c(0.95, 2.05)) + | |
labs(title = "Collider", subtitle = "(Inverted fork)") + | |
theme_dag(base_family = "Assistant") + | |
theme(plot.title = element_text(hjust = 0.5, face = "bold", color = "#7A0403"), | |
plot.subtitle = element_text(hjust = 0.5, color = "#7A0403")) | |
combined_associations <- (confounder | plot_spacer() | mediator | plot_spacer() | collider) + | |
plot_layout(widths = c(0.32, 0.02, 0.32, 0.02, 0.32)) | |
combined_associations |
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