Managing Precision

Managing Precision

• floor() The floor function
  
• ceiling() The ceiling function
  
• round() Round to the nearest integer
• round( ,2) Round to two decimal places

Also - Absolute Value Function

• abs() Absolute Value Function

floor and ceiling function

floor(pi)

## [1] 3

ceiling(pi)

## [1] 4

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# Exercise:  write pi  with 4 decimal places.
round(pi,4)

## [1] 3.1416

Changing Types

• as.numeric()

• as.integer()

> pi
[1] 3.141593
> floor(pi)
[1] 3
> ceiling(pi)
[1] 4
> round(pi,3)
[1] 3.142
> as.integer(pi)
[1] 3