hrbrmstr

gadenbuie

#' Render Table of Contents
#' 
#' A simple function to extract headers from an RMarkdown or Markdown document
#' and build a table of contents. Returns a markdown list with links to the 
#' headers using 
#' [pandoc header identifiers](http://pandoc.org/MANUAL.html#header-identifiers).
#' 
#' WARNING: This function only works with hash-tag headers.
#' 
#' Because this function returns only the markdown list, the header for the

tjmahr

library(ggplot2)

# preview a file that would be created by ggsave()
ggpreview <- function(...) {
  fname <- tempfile(fileext = ".png")
  ggsave(filename = fname, ...)
  system2("open", fname)
  invisible(NULL)
}

hrbrmstr