pie_chart: Create Pie or Donut Charts

In IOBR: Immune Oncology Biological Research

Create Pie or Donut Charts

Description

Generates a pie chart or donut chart from input data.

Usage

pie_chart(
  input,
  var,
  var2 = NULL,
  type = 2,
  show_freq = FALSE,
  color = NULL,
  palette = "jama",
  title = NULL,
  text_size = 10,
  title_size = 20,
  add_sum = FALSE
)

Arguments

input	Input dataframe.
var	Variable for the chart.
var2	Secondary variable for donut chart (type = 3).
type	Chart type: 1 (pie), 2 (donut), 3 (PieDonut via webr).
show_freq	Logical to show frequencies. Default is FALSE.
color	Optional color palette.
palette	Color palette name. Default is "jama".
title	Plot title. Default is NULL.
text_size	Text size. Default is 10.
title_size	Title size. Default is 20.
add_sum	Logical to add sum to labels. Default is FALSE.

Value

A ggplot object.

Author(s)

Dongqiang Zeng

Examples

# Simulate data
set.seed(123)
sim_data <- data.frame(
  Subtype = sample(c("EBV", "GS", "MSI", "CIN"), 100, replace = TRUE)
)

# Create pie chart
p1 <- pie_chart(input = sim_data, var = "Subtype", palette = "jama")
if (!is.null(p1)) print(p1)

# Create donut chart
p2 <- pie_chart(input = sim_data, var = "Subtype", type = 2)
if (!is.null(p2)) print(p2)

IOBR documentation built on May 30, 2026, 5:07 p.m.