getSymbols.rda: Load Data from R Binary File

In quantmod: Quantitative Financial Modelling Framework

Description

Downloads Symbols to specified env from local R data file. This method is not to be called directly, instead a call to getSymbols(Symbols,src='rda') will in turn call this method. It is documented for the sole purpose of highlighting the arguments accepted, and to serve as a guide to creating additional getSymbols ‘methods’.

Usage

getSymbols.rda(Symbols,
                 env,
                 dir="",
                 return.class = "xts",
                 extension="rda",
                 col.names=c("Open","High","Low","Close","Volume","Adjusted"),
                 ...)

Arguments

Symbols	a character vector specifying the names of each symbol to be loaded
env	where to create objects. (.GlobalEnv)
dir	directory of rda/RData file
return.class	class of returned object
extension	extension of R data file
col.names	data column names
...	additional parameters

Details

Meant to be called internally by getSymbols (see also).

One of a few currently defined methods for loading data for use with quantmod. Essentially a simple wrapper to the underlying R load.

Value

A call to getSymbols.csv will load into the specified environment one object for each Symbol specified, with class defined by return.class. Presently this may be ts, its, zoo, xts, data.frame, or timeSeries.

Author(s)

Jeffrey A. Ryan

See Also

getSymbols, load, setSymbolLookup

Examples

## Not run: 
# All 3 getSymbols calls return the same
# MSFT to the global environment
# The last example is what NOT to do!

## Method #1
getSymbols('MSFT',src='rda')
getSymbols('MSFT',src='RData')


## Method #2
setDefaults(getSymbols,src='rda')
  # OR
setSymbolLookup(MSFT='rda')
  # OR
setSymbolLookup(MSFT=list(src='rda'))

getSymbols('MSFT')

#########################################
##  NOT RECOMMENDED!!!
#########################################
## Method #3
getSymbols.rda('MSFT',verbose=TRUE,env=globalenv())

## End(Not run)

Example output

Loading required package: xts
Loading required package: zoo

Attaching package: 'zoo'

The following objects are masked from 'package:base':

    as.Date, as.Date.numeric

Loading required package: TTR
Version 0.4-0 included new data defaults. See ?getSymbols.
'getSymbols' currently uses auto.assign=TRUE by default, but will
use auto.assign=FALSE in 0.5-0. You will still be able to use
'loadSymbols' to automatically load data. getOption("getSymbols.env")
and getOption("getSymbols.auto.assign") will still be checked for
alternate defaults.

This message is shown once per session and may be disabled by setting 
options("getSymbols.warning4.0"=FALSE). See ?getSymbols for details.


file  MSFT.rda  does not exist  in   ....skipping
[1] "MSFT"

file  MSFT.rda  does not exist  in   ....skipping
[1] "MSFT"

file  MSFT.rda  does not exist  in   ....skipping
[1] "MSFT"
loading  MSFT .....
file  MSFT.rda  does not exist  in   ....skipping
[1] "MSFT"

quantmod documentation built on May 2, 2019, 5:48 p.m.