R Markdown Themes

Cristiano Gabrieli — Mon, 13 Apr 2026 14:11:56 +0000

R Markdown is one of the best tools for creating technical reports — but the default theme often looks outdated.
A clean, modern theme makes your reports easier to read and more professional.

In this guide, I’ll show you how to build a simple, reusable R Markdown theme you can apply to any project.

---
title: "Clean R Markdown Theme"
author: "Your Name"
output:
  html_document:
    theme: null
    css: "style.css"
---
We disable the default theme (theme: null) so we can fully control the styling.
Create a Custom CSS File

body {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
background: #f7f7f7;
line-height: 1.6;
color: #333;
}

h1, h2, h3 {
font-weight: 600;
color: #222;
}

code {
background: #eee;
padding: 2px 4px;
border-radius: 4px;
}

pre {
background: #272822;
color: #f8f8f2;
padding: 12px;
border-radius: 6px;
}

This gives your report a clean, modern look.

Style the Title Block

h1.title {
  margin-top: 40px;
  font-size: 2.2rem;
  text-align: center;
}

.author, .date {
  text-align: center;
  color: #555;
}

This makes your report look polished and professional.

Improve Tables and Figures

table {
width: 100%;
border-collapse: collapse;
margin-bottom: 20px;
}

th, td {
padding: 10px;
border-bottom: 1px solid #ddd;
}

img {
display: block;
margin: 20px auto;
max-width: 100%;
}

Render the Document

rmarkdown::render("report.Rmd")

You’ll get a clean, modern HTML report using your custom theme.

Wrap‑Up
A custom R Markdown theme gives your reports:

a professional look

consistent branding

better readability

a reusable structure for future projects

This is the same approach I use in my own R Markdown templates and upcoming HTML template pack.

“R Programming for Absolute Beginners: Learn R with Simple Code Snippets”

Cristiano Gabrieli — Sat, 11 Apr 2026 13:21:55 +0000

Introduction
If you're starting your journey with R, the fastest way to learn is by experimenting with small, simple code snippets. In this post, I’m sharing three beginner‑friendly examples taken from my book R Programming for Absolute Beginners. Each snippet is short, practical, and designed to help you build confidence quickly.

Let’s jump in.
A simple print statement is often the first step in learning any programming language.

print("Hello, R!")
What it does:

Displays a message in the console.
Why it matters:

It teaches you how R outputs text and confirms your environment is working.

Create a Numeric Vector Vectors are one of the core data structures in R. Here’s how to create one:

numbers <- c(1, 2, 3, 4, 5)
numbers

What it does:

Creates a vector of numbers and prints it.
Why it matters:

Vectors are used everywhere in R — data analysis, statistics, machine learning, and more.

Calculate the Mean Once you have a vector, you can perform basic calculations easily.

numbers <- c(10, 20, 30, 40, 50)
mean(numbers)

What it does:

Computes the average of the values.
Why it matters:

This introduces you to R’s built‑in functions, which are extremely powerful for data analysis.

r
beginners
programming
tutorial
data science

You can continue your R journey with my full book here:

https://artifactcentral.org/landing-page
https://books2read.com/R-Thestoryteller

Learning R doesn’t have to be complicated. Small, simple snippets like these help you build confidence quickly and understand the language step by step.

DEV Community: Cristiano Gabrieli

R Markdown Themes

“R Programming for Absolute Beginners: Learn R with Simple Code Snippets”