countWarnings: Evaluates an Expression and Return the Number of Warnings

In guytuori/simScores: Similarity Scores for Baseball Players

Description

Evaluates an expression. Returns a list with the value of expression and the number of warnings thrown by an expression.

Usage

countWarnings(expr)

Arguments

expr	the expression to evaluate

Value

list of length two. The first element of the list is names "ans" and it contains the results of the expression. The second element of the list is named "warnings" and contains the number of warning generated by the expression.

References

http://stackoverflow.com/questions/4020239/warnings-does-not-work-within-a-function-how-can-one-work-around-this

Examples

countWarnings(log(-1))
foo <- function(){
   warning("first warning!")
   warning("second warning!")
   warning("third warning!")
   invisible()
 }
 countWarnings(foo())

guytuori/simScores documentation built on May 17, 2019, 9:29 a.m.