Using R for Introductory Statistics : John Verzani

Data 71.2.3 AssignmentIt is often convenient to name a value so that we can use it later. Doing so is calledassignment. Assigment is straightforward. We put a name on the left-hand side of theequals sign and the value on the right. Assignment does not produce any printed output.> x = 2 # assignment is quiet> x + 3 # x is now 2[1] 5> pi # pi is a built-inconstant[1] 3.142> e^2 # e is notError: Object “e” not found> e = exp(1) # e is now its familiarvalue> e^2[1] 7.389The variable e is not previously assigned, unlike the built-in constant pi. If we insistthough, we can assign it as illustrated.Assignment with=versus AReallySmallNumber = 0.000000001Case is important. Some variable names are naturally used to represent certain types ofdata. Often n is for a length; x or y stores a data vector; and i and j are for integers and