R: Evaluate input and return all details of evaluation.
evaluate
R Documentation
Evaluate input and return all details of evaluation.
Description
Compare to eval, evaluate captures all of the
information necessary to recreate the output as if you had copied and pasted
the code into a R terminal. It captures messages, warnings, errors and
output, all correctly interleaved in the order in which they occured. It
stores the final result, whether or not it should be visible, and the
contents of the current graphics device.
input object to be parsed and evaluated. May be a string, file
connection or function.
envir
environment in which to evaluate expressions.
enclos
when envir is a list or data frame, this is treated as
the parent environment to envir.
debug
if TRUE, displays information useful for debugging,
including all output that evaluate captures.
stop_on_error
if 2, evaluation will halt on first error and you
will get no results back. If 1, evaluation will stop on first error
without signaling the error, and you will get back all results up to that
point. If 0 will continue running all code, just as if you'd pasted
the code into the command line.
keep_warning, keep_message
whether to record warnings and messages.
new_device
if TRUE, will open a new graphics device and
automatically close it after completion. This prevents evaluation from
interfering with your existing graphics environment.
output_handler
an instance of output_handler that
processes the output from the evaluation. The default simply prints the
visible return values.