Some Common Functions

Abstract

This chapter covers some common functions in R. The first section discusses the function options(), which sets the default options for R. The second section describes the functions round(), signif(), and noquote(), which are used in formatting objects. The third section covers the function cat(), which is used to print results to the console, a file, or a connection. The fourth section discusses the functions format(), print(), plot(), and summary() for displaying objects. The functions in the fourth section operate differently on different classes of objects. In the fifth section, we cover the functions anova(), coef(), effects(), residuals(), fitted(), vcov(), confint(), and predict(), which are functions that operate specifically on models and which also operate differently depending on the class of the object.