Continue after errors

DESCRIPTION:

Evaluate a possible erroneous expression without returning to prompt.

USAGE:

try(expr, silent = TRUE) 

REQUIRED ARGUMENTS:

expr
An expression to evaluate. It will be evaluated in the frame of the caller.

OPTIONAL ARGUMENTS:

silent
If FALSE then print the error message if there is an error evaluating expr. By default the error message is not printed. (It is returned by the function if there is an error, so it will be printed if the result is not assigned to a variable, just like the return value of any function.)

VALUE:

Either the value of the expression or an object of class "Error" containing the error message generated if there was an error while evaluating the expression.

SEE ALSO:

,

EXAMPLES:

# avoid stopping simulation because of bad data points 
set.seed(1) 
inputs <- sapply(1:10, function(i)rpois(1,1)) 
f <- function(x) if(x<1) stop("x<1") else log(x) 
val <- lapply(inputs, function(x)try(f(x))) 
unlist(val[!sapply(val, is, "Error")]) # extract ones that worked