[R-SIG-Finance] chartSeries() and addTA() from within an S4 method

[Jeff Ryan]

Hi Lorenzo,

add*** functions need to work 'magically' from the command line _and_
from within the chartSeries (or calls in general), so there is a check
of where it is called from to determine _when_ it does the drawing.

Simply change addTA(mktPositions) plot(addTA(mktPositions)), to cause
the TA to be draw.

HTH
Jeff

On Fri, Dec 12, 2008 at 12:07 PM, Lorenzo Bertolini
<sig.lorenzo.bertolini at googlemail.com> wrote:
> Hello list,
>
> wonder if anyone can help me out. I want to call chartSeries() and
> subsequently addTA() from within an S4 method.
> The chartSeries() works, but the addTA() does not....
>
> setMethod("plot", "TradingSystem_FX", function(x){
> ..
> ..
>                    # plot fx timeseries
>                    x11()
>                    fxSeries = as.quantmod.OHLC(seriesFX,col.names="Close")
>
> chartSeries(fxSeries,theme="white",TA="addEMA(200,col=4)",name=seriesName)
>
>                    #plot marketposition
>                    addTA(mktPositions)
>
> ..
>
>                    })
>
> Thanks and have a nice WE,
>
> Lorenzo Bertolini
>
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>
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-- 
Jeffrey Ryan
jeffrey.ryan at insightalgo.com

ia: insight algorithmics
www.insightalgo.com