| plotOHLC {tseries} | R Documentation |
Plots open-high-low-close bar chart of a (financial) time series.
plotOHLC(x, xlim = NULL, ylim = NULL, xlab = "Time", ylab, col = par("col"),
bg = par("bg"), axes = TRUE, frame.plot = axes, ann = par("ann"),
main = NULL, date = c("calendar", "julian"), format = "%Y-%m-%d",
origin = "1899-12-30", ...)
x |
a multivariate time series object of class |
xlim, ylim, xlab, ylab, col, bg, axes, frame.plot, ann,
main |
graphical arguments, see |
date |
a string indicating the type of x axis annotation. Default is calendar dates. |
format |
a string indicating the format of the x axis annotation if
|
origin |
an R object specifying the origin of the Julian dates
if |
... |
further graphical arguments passed to
|
Within an open-high-low-close bar chart, each bar represents price information for the time interval between the open and the close price. The left tick for each bar indicates the open price for the time interval. The right tick indicates the closing price for the time interval. The vertical length of the bar represents the price range for the time interval.
The time scale of x must be in Julian dates (days since the
origin).
A. Trapletti
plot.default,
format.POSIXct,
get.hist.quote
if(!inherits(try(open(url("http://quote.yahoo.com")), silent = TRUE),
"try-error")) {
## Plot OHLC bar chart for the last 'nDays' days of the instrument
## 'instrument'
nDays <- 50
instrument <- "^gspc"
start <- strftime(as.POSIXlt(Sys.time() - nDays*24*3600),
format="%Y-%m-%d")
end <- strftime(as.POSIXlt(Sys.time()), format = "%Y-%m-%d")
x <- get.hist.quote(instrument = instrument, start = start, end = end,
retclass = "ts")
plotOHLC(x, ylab = "price", main = instrument)
}