FFdownload: Downloads Datasets from Kenneth French's Website

Description Usage Arguments Value Examples

View source: R/FFdownload.R

Description

FFdownload returns an RData file with all (possibility to exclude the large daily) datasets from Kenneth French's Website. Should help researchers to work with the datasets and update the regularly. Allows for reproducible research. Be aware that processing (especially when including daily files) takes quite a long time!

Usage

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FFdownload(
  output_file = "data.Rdata",
  tempd = NULL,
  exclude_daily = FALSE,
  download = TRUE,
  download_only = FALSE,
  listsave = NULL,
  inputlist = NULL
)

Arguments

output_file

name of the .RData file to be saved (include path if necessary)

tempd

specify if you want to keep downloaded files somewhere save. Seems to be necessary for reproducible research as the files on the website do change from time to time

exclude_daily

excludes the daily datasets (are not downloaded) ==> speeds the process up considerably

download

set to TRUE if you actually want to download again. set to false and specify tempd to keep processing the already downloaded files

download_only

set to FALSE if you want to process all your downloaded files at once

listsave

if not NULL, the list of unzipped files is saved here (good for processing only a limited number of files through inputlist). Is written before inputlist is processed.

inputlist

if not NULL, FFdownload tries to match the names from the list with the list of zip-files

Value

RData file

Examples

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## Not run: 
tempf <- tempfile(fileext = ".RData"); outd <- paste0(tempdir(),"/",format(Sys.time(), "%F_%H-%M"))
temptxt <- tempfile(fileext = ".txt")
# Example 1: Use FFdownload to get a list of all monthly zip-files. Save that list as temptxt.
FFdownload(exclude_daily=TRUE,download=FALSE,download_only=TRUE,listsave=temptxt)
read.delim(temptxt,sep = ",")
# set vector with only files to download (we try a fuzzyjoin, so "Momentum" should be enough to get
# the Momentum Factor)
inputlist <- c("Research_Data_Factors","Momentum_Factor","ST_Reversal_Factor","LT_Reversal_Factor")
# Now process only these files if they can be matched (download only)
FFdownload(exclude_daily=FALSE,tempd=outd,download=TRUE,download_only=FALSE,
inputlist=inputlist,output_file = tempf)
list.files(outd)
# Then process all the downloaded files
FFdownload(output_file = tempf, exclude_daily=TRUE,tempd=outd,download=FALSE,
download_only=FALSE,inputlist=inputlist)
load(tempf); FFdownload$`x_F-F_Momentum_Factor`$monthly$Temp2[1:10]
# Example 2: Download all non-daily files and process them
# Commented out to not being tested
# tempf2 <- tempfile(fileext = ".RData");
# outd2<- paste0(tempdir(),"/",format(Sys.time(), "%F_%H-%M"))
# FFdownload(output_file = tempf2,tempd = outd2, exclude_daily = TRUE, download = TRUE,
# download_only=FALSE, listsave=temptxt)
# load(tempf2)
# FFdownload$x_25_Portfolios_5x5$monthly$average_value_weighted_returns

## End(Not run)

FFdownload documentation built on May 28, 2021, 1:06 a.m.