Play_with_Quarto.md

Play with Quarto v. 1.4

Charalampos A. Lazaris 2024-02-18

• Introduction
• Code
  • Markdown formatting:

Introduction

This is a Quarto tutorial based on the official Posit cheatsheet. It features some of the new features in Quarto v. 1.4.

Code

Let’s insert some inline code in R: 2 gives 2

Here is some R code:

Code

p <- 1 + 1
print(p)

[1] 2

Now, let’s import some data and create a graph, after loading the required libraries:

Code

library(tidyverse)

Code

data(iris)
glimpse(iris)

Rows: 150
Columns: 5
$ Sepal.Length <dbl> 5.1, 4.9, 4.7, 4.6, 5.0, 5.4, 4.6, 5.0, 4.4, 4.9, 5.4, 4.…
$ Sepal.Width  <dbl> 3.5, 3.0, 3.2, 3.1, 3.6, 3.9, 3.4, 3.4, 2.9, 3.1, 3.7, 3.…
$ Petal.Length <dbl> 1.4, 1.4, 1.3, 1.5, 1.4, 1.7, 1.4, 1.5, 1.4, 1.5, 1.5, 1.…
$ Petal.Width  <dbl> 0.2, 0.2, 0.2, 0.2, 0.2, 0.4, 0.3, 0.2, 0.2, 0.1, 0.2, 0.…
$ Species      <fct> setosa, setosa, setosa, setosa, setosa, setosa, setosa, s…

We now plot Petal.Length vs. Petal.Width:

Code

#| fig-cap: "Petal length vs. petal width in iris species"
ggplot(data = iris, aes(x = Petal.Width, y = Petal.Length)) +
    geom_point() +
    geom_smooth(method = "lm", se = TRUE) +
    ggtitle("Petal length vs. petal width") +
    xlab("Petal width") + ylab("Petal length") +
    theme_bw()

`geom_smooth()` using formula = 'y ~ x'

Tip

Consistency

Use dplyr for data wrangling and ggplot2 for plotting - keep it consistent

Markdown formatting:

Here is some bold text and here is some text in italics. We can also text or strikethrough text: hello. We can also create some lists. Let’s start with a numbered list:

1. First
2. Second
3. Third

Now, let’s make the same list, nested:

1. First
   1. Hello
   2. Hi
   3. Ciao
2. Second
3. Third

We can also have unordered lists:

• First
  • Hello
  • Hi
  • Ciao
    • 1
• Second
• Third

We can also insert links to URLs: my website or links to pictures. Here is a photo of my favorite writer:

We can also insert tables:

ID	Name	Surname
1	James	Dean
2	Marlon	Brando
3	Montgomery	Cliff