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rquantmod

Get the right series for ttr function

I got a few examples from TTR documentation like:

data(ttrc)

mfi <- MFI(ttrc[,c("High","Low","Close")], ttrc[,"Volume"])

data(ttrc)
price <- ttrc[,"Close"]

data(ttrc)
macd <- MACD( ttrc[,"Close"], 12, 26, 9, maType="EMA" )

data(ttrc)
ema.20 <- EMA(ttrc[,"Close"], 20)

Is data(ttrc) a data-dummy or what? I want to use 

getSymbols("AAPL",src="yahoo")

for the Series and select the right column from it like 'close' or 'volume'

"series that is coercible to xts or matrix" How do I transform the timeseries from getSymbols to right matrix to use the examples from the documentation?

Thanks!

Solution

  • The manual, ?ttrc, confirms that the data is random.

    You can extract the columns you want with the Ad, Vo, etc. functions or directly with square brackets.

    tail( MACD(Ad(AAPL)) )
tail( MACD( AAPL[,"AAPL.Adjusted"] ) )