Making knitr run a r script: do I use read_chunk or source?

Question

I am running R version 2.15.3 with RStudio version 0.97.312. I have one script that reads my data from various sources and creates several data.tables. I then have another r

Answer 1

There isn't an option to run a chunk interactively from within knitr AFAIK. However, this can be done easily enough with something like:

#' Run a previously loaded chunk interactively
#'
#' Takes labeled code loaded with load_chunk and runs it in the /global/ envir (unless otherwise specified)
#'
#' @param chunkName The name of the chunk as a character string
#' @param envir The environment in which the chunk is to be evaluated 
run_chunk <- function(chunkName,envir=.GlobalEnv) {
    chunkName <- unlist(lapply(as.list(substitute(.(chunkName)))[-1], as.character))    
    eval(parse(text=knitr:::knit_code$get(chunkName)),envir=envir) 
} 
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