download_RStudio_CRAN_data.Rd

% Generated by roxygen2 (4.0.2): do not edit by hand
\name{download_RStudio_CRAN_data}
\alias{download_RStudio_CRAN_data}
\title{Download RStudio CRAN mirror data files into a folder}
\usage{
download_RStudio_CRAN_data(START = as.Date(Sys.time()) - 5,
  END = as.Date(Sys.time()), log_folder = tempdir(),
  trunc_END_date_to_today = TRUE, override = FALSE, message = TRUE, ...)
}
\arguments{
  \item{START}{the defaults is 5 days before today. A
  character string of the START date for files to be
  downloaded. The date format is "YYYY-MM-DD".}

  \item{END}{the defaults is today. A character string of
  the END date for files to be downloaded. The date format
  is "YYYY-MM-DD".}

  \item{log_folder}{the folder into which we would like the
  files to be downloaded to. Default is the temporary
  folder picked by \link{tempdir}.}

  \item{trunc_END_date_to_today}{default is TRUE. Makes
  sure that if END date is later then today, the END date
  will be change to today (since otherwise, we will only
  get many 404 errors)}

  \item{override}{boolean (default is FALSE) - should the
  function download files that are already available in the
  temp folder}

  \item{...}{not in use.}

  \item{massage}{boolean (default is TRUE) - should a
  massage be printed in interesting cases.}
}
\value{
Returns the value of log_folder.
}
\description{
This function downlaod these files based on the code from
the downlaod page (\url{http://cran-logs.rstudio.com/})
into a temporary folder.
}
\details{
RStudio maintains its own CRAN mirror,
\url{http://cran.rstudio.com} and offers its log files.
}
\examples{
\dontrun{
# The first two functions might take a good deal of time to run (depending on the date range)
RStudio_CRAN_data_folder <-
      download_RStudio_CRAN_data(START = '2013-04-02',
                                 END = '2013-04-05')
                                 # around the time R 3.0.0 was released
# RStudio_CRAN_data_folder <- download_RStudio_CRAN_data()
my_RStudio_CRAN_data <- read_RStudio_CRAN_data(RStudio_CRAN_data_folder)

# barplots: (more functions can easily be added in the future)
barplot_package_users_per_day("installr", my_RStudio_CRAN_data)
barplot_package_users_per_day("plyr", my_RStudio_CRAN_data)
}
}
\seealso{
\link{download_RStudio_CRAN_data},
\link{read_RStudio_CRAN_data},\link{barplot_package_users_per_day}
}