md: Diagram elements

In modeldiagramR: Generate Model Diagrams for Linear Mixed Effect Models

Diagram elements

Description

Similar to ggplot2::ggplot()'s ggplot2::theme() system, the md_ functions specify the display of how the node components of the diagram are drawn.

• md_color(): border of the node.

• md_fill(): fill color of the node.

• md_fontColor(): font color of the text in the nodes.

Usage

md_color(diagram = "gray25", random = "gray25", fixed = "gray25")

md_fill(diagram = "aliceblue", random = "aliceblue", fixed = "darkseagreen1")

md_fontColor(diagram = "black", random = "black", fixed = "black")

Arguments

diagram	Specifies the outline color, fill color, or font color for the elements in the measurement diagram circles (hierarchical diagram). Default is "gray25" for (md_color()), "aliceblue" for (md_fill()), and "black" for (md_fontColor()).
random	Specifies the outline color, fill color, or font color for the elements in the random effect variable boxes. Default is "gray25" for (md_color()), "aliceblue" for (md_fill()), and "black" for (md_fontColor()).
fixed	Specifies the outline color, fill color, or font color for the elements in the fixed effect variable boxes. Default is "gray25" for (md_color()), "darkseagreen1" for (md_fill()), and "black" for (md_fontColor()).

Value

A list object containing color specifications for the border of the nodes.

A list object containing color specifications for the fill of the nodes.

A list object containing color specifications for the font color of the nodes.

Examples

# merMod object example
library(lme4)

sleepstudy_lmer <- lmer(Reaction ~ Days + (Days | Subject), sleepstudy)
summary(sleepstudy_lmer)
model_diagram(sleepstudy_lmer,
  nodeColors = md_color(diagram="steelblue", random="steelblue", fixed="darkolivegreen1"),
  nodeFillColors = md_fill(diagram="aliceblue", random="aliceblue", fixed="darkseagreen1"),
  nodeFontColors = md_fontColor(diagram="black", random="blue", fixed="black"))

modeldiagramR documentation built on April 15, 2026, 5:07 p.m.