r - quantmod::chartSeries does not plot all components -

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i have read quite lot of r docs, can't find recognized answer this. forehead sore banging against desk. ;)

this specific library(quantmod), because trying learn, suppose general question too.

r 2.12.2 gui 1.36 leopard build 64-bit (5691) mac os x 10.6.6

i trying replicate behaviour of quantmod example @ http://www.quantmod.com/examples/intro/

from gui, - below generates chart http://www.quantmod.com/examples/intro/aapl-full.png:

> require(ttr) > getsymbols("aapl") [1] "aapl" > chartseries(aapl) > addmacd() > addbbands()

but when source() .r file gui, chart for

> chartseries(aapl)

that is, price chart , volume chart underneath it. further, if try following command line kind of works expected.

$ r --no-save `<`quantmod.r

a file called rplots.pdf generated, contains 3 pages. third page contains price + volume + macd + bollinger bands.

what quantmod doing make life difficult? or not understand blindingly obvious , making life difficult?

what have sourced script able use addmacd() , addbbands() functions chart?

as side question, data generated addmacd() , addbbands() stored?

after reading through quantmod docs , before banging head against desk, try searching r-sig-finance mailing list archives (one way via "support lists" tab on rseek.org). question has come several times on list.

to answer main question, see "note" section of ?ta:

 calling of above methods within function or script  require them wrapped in ‘plot’ call  rely on context of call initiate actual charting  addition.

so should change example to:

> require(ttr) > getsymbols("aapl") [1] "aapl" > chartseries(aapl) > plot(addmacd()) > plot(addbbands())

to answer side question, see "value" section of ?chartseries, along help("chob-class") , help("chobta-class").


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