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R.utils (version 1.28.4)

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

Description

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

Usage

evalCapture(expr, code=TRUE, output=code, ..., trim=TRUE, collapse="",
  envir=parent.frame())
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.}
Returns a character string class 'CapturedEvaluation'.
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", kk)
## +
## Iteration #1
## Iteration #2
## Iteration #3
## > print(Sys.time())
## [1] "2011-11-06 11:06:32 PST"
## > type <- "horse"
## > type
## [1] "horse"
}
[object Object]

utilities

Arguments