a character string giving the name of the quote
symbol to download. See the web page of the data provider for
information about the available quote symbols.
start
an R object specifying the date of the start of the
period to download. This must be in a form which is recognized by
as.POSIXct, which includes R POSIX date/time objects,
objects of class "date" (from package date) and
"chron" and "dates" (from package chron), and
character strings representing dates in ISO 8601 format. Defaults
to 1992-01-02.
end
an R object specifying the end of the download period, see
above. Defaults to yesterday.
quote
a character string or vector indicating whether to
download opening, high, low, or closing quotes, or volume. For the
default provider, this can be specified as "Open",
"High", "Low", "Close", and "Volume",
respectively. Abbreviations are allowed.
provider
a character string with the name of the data
provider. Currently, only "yahoo" is implemented. See
http://quote.yahoo.com/ for more information.
method
tool to be used for downloading the data. See
download.file for the available download methods.
origin
an R object specifying the origin of the Julian dates, see
above. Defaults to 1899-12-30 (Popular spreadsheet programs
internally also use Julian dates with this origin).
quiet
a flag to suppress output
compression
Governs the granularity of the retrieved data;
"d" for daily, "w" for weekly or "m" for monthly. Defaults to "d".
Details
This function is a direct copy from package tseries, and
all credit must go to the author of that package.
Value
An "its" object with the requested data
Author(s)
A. Trapletti [*not* responsible for errors, adapted from his original idea by Giles Heywood]