evalCapture

From R.utils v1.9.6 by Henrik Bengtsson

Evaluates an expression and captures the code and/or the output

Evaluates an expression and captures the code and/or the output.

Keywords: utilities

Usage

evalCapture(expr, code=TRUE, output=code, ..., trim=TRUE, collapse="
", envir=parent.frame())

Arguments

expr: The expression to be evaluated.
...: Additional arguments passed to sourceTo which in turn passes arguments to source().
code: If TRUE, the deparsed code of the expression is echoed.
output: If TRUE, the output of each evaluated subexpression is echoed.
envir: The @enviroment in which the expression is evaluated.
trim: If TRUE, the captured rows are trimmed.
collapse: A character string used for collapsing the captured rows. If NULL, the rows are not collapsed.

Value

Returns a character string class 'CapturedEvaluation'.

Examples

print(evalCapture({
 n <- 3;
 n;

 for (kk in 1:3) {
   printf("Iteration #%d
", kk);
 }

 print(Sys.time());

 type <- "horse";
 type;
}))

## > n <- 3
## > n
## [1] 3
## > for (kk in 1:3) {
## +     printf("Iteration #\%d\n", kk)
## + }
## Iteration #1
## Iteration #2
## Iteration #3
## > print(Sys.time())
## [1] "2011-11-06 11:06:32 PST"
## > type <- "horse"
## > type
## [1] "horse"

Documentation reproduced from package R.utils, version 1.9.6, License: LGPL (>= 2.1)

Community examples

Looks like there are no examples yet.