Web Application Development with R Using Shiny - Third Edition

Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "The [1] phrase tells you that R returned one result; in this case, 4."

A block of code is set as follows:

<ul> 
  <li>First bullet</li> 
  <li>Second bullet</li> 
  <li>Third bullet</li> 
</ul> 

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

tabsetPanel(id = "theTabs",  tabPanel("Summary", textOutput("summary"),     value = "summary"),  tabPanel("Trend", plotOutput("trend"),    value = "trend"), tabPanel("Map", leafletOutput("map"), ...