Ggplot 2 - Essentials - Easy Guides - Wiki - Sthda PDF

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3/17/2021

ggplot2 - Essentials - Easy Guides - Wiki - STHDA

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Home / Easy Guides / R software / Data Visualization / ggplot2 - Essentials

Intro to R with Tidyverse This course is designed so people can take it even if they have no experience programming.

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 ggplot2 - Essentials Tools

Introduction ggplot2 is a powerful and a exible R package, implemented by Hadley Wickham, for producing elegant graphics. The concept behind ggplot2 divides plot into three dierent fundamental parts: Plot = data + Aesthetics + Geometry. The principal components of every plot can be dened as follow: data is a data frame Aesthetics is used to indicate x and y variables. It can also be used to control the color, the size or the shape of points, the height of bars, etc….. Geometry denes the type of graphics (histogram, box plot, line plot, density plot, dot plot, ….) There are two major functions in ggplot2 package: qplot() and ggplot() functions. qplot() stands for quick plot, which can be used to produce easily simple plots. ggplot() function is more exible and robust than qplot for building a plot piece by piece. This document provides R course material for producing dierent types of plots using ggplot2. www.sthda.com/english/wiki/ggplot2-essentials

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3/17/2021

ggplot2 - Essentials - Easy Guides - Wiki - STHDA

 If you want be highly eective, download our book: Guide to Create Beautiful Graphics in R

Install and load ggplot2 package # Installation install.packages('ggplot2') # Loading library(ggplot2)

Data format and preparation

 The data should be a data.frame (columns are variables and rows are observations). The data set mtcars is used in the examples below: # Load the data data(mtcars) df...