evaluate: evaluate – R documentation

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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.

Usage

evaluate(input, envir = parent.frame(), enclos = NULL, debug = FALSE, 
    stop_on_error = 0L, keep_warning = TRUE, keep_message = TRUE, new_device = TRUE, 
    output_handler = default_output_handler, filename = NULL, include_timing = FALSE)

Arguments

`input`	input object to be parsed and evaluated. May be a string, file connection or function. Passed on to `parse_all()`.
`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.
`filename`	string overrriding the `base::srcfile()` filename.
`include_timing`	if `TRUE`, evaluate will wrap each input expression in `system.time()`, which will be accessed by following `replay()` call to produce timing information for each evaluated command.

evaluate

Parsing and Evaluation Tools that Provide More Details than the Default

v0.14

MIT + file LICENSE

Authors

Hadley Wickham [aut], Yihui Xie [aut, cre] (<https://orcid.org/0000-0003-0645-5666>), Michael Lawrence [ctb], Thomas Kluyver [ctb], Jeroen Ooms [ctb], Barret Schloerke [ctb], Adam Ryczkowski [ctb], Hiroaki Yutani [ctb], Michel Lang [ctb], Karolis Koncevičius [ctb]

Initial release

evaluate

Description

Usage

Arguments

evaluate

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