Nothing
#' Calculate Run-time Statistics
#'
#' This is stand-alone function. It computes the runtime stats
#' without rendering the md/html/pdf file.
#'
#' @param stud_fname The rmd filename of the student.
#' @param knit_root_dir The working directory to use when knitting the file.
#' @param return_env A logical value to indicate if the environment from the
#' rmd file should be return. If FALSE, an NA value is returned.
#'
#' @details This routine is not used within any other function within the
#' package. Figures are not cleaned or removed.
#'
#' @return A list containing the running time in seconds, the memory used
#' by the final environment in bytes (as a numeric scalar), and the
#' environment object containing all the generated objects from the rmd file.
#' @seealso \code{\link{render_one}}
#' @export
#'
check_runtime <- function(stud_fname, knit_root_dir, return_env=FALSE) {
# create tempdir
if(!missing(knit_root_dir)){
old_root <- knitr::opts_knit$get("root.dir")
knitr::opts_knit$set(root.dir = knit_root_dir)
}
e_stud <- new.env()
start_time <- Sys.time()
stud_out <- knitr::knit(stud_fname, quiet=TRUE, envir=e_stud)
end_time <- Sys.time()
mem_usage <- env_size(e_stud)
if(file.exists(stud_out)) {
unlink(stud_out) # does not clean figures!
}
if(!missing(knit_root_dir)){
knitr::opts_knit$set(root.dir = old_root)
}
runtime_secs <- as.numeric(difftime(end_time, start_time, units="secs"))
out_obj <- list(run_time = runtime_secs,
mem_usage = mem_usage,
env=NA)
if(return_env)
out_obj$env <- e_stud
return(out_obj)
}
Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.