Hi,
I'm having trouble with quantmod's addTA plotting functions. They seem to
work fine when run from the command line. But when run inside a function,
only the last one run is visible. Here's an example.
test.addTA <- function(from = "2010-06-01") {
getSymbols("^GSPC", from = from)
GSPC.close <- GSPC[,"GSPC.Close"]
GSPC.EMA.3 <- EMA(GSPC.close, n=3, ratio=NULL)
GSPC.EMA.10 <- EMA(GSPC.close, n=10, ratio=NULL)
chartSeries(GSPC.close, theme=chartTheme('white'), up.col="black",
dn.col="black")
addTA(GSPC.EMA.3, on = 1, col = "#0000ff")
addTA(GSPC.EMA.10, on = 1, col = "#ff0000")
# browser()
}
When I run this, GSPC.close always appears. But only GSPC.EMA10 appears on
the plot along with it. If I switch the order of the addTA calls,
only GSPC.EMA3 appears. If I uncomment the call to browser() neither appears
when the browser() interrupt occurs. I can then draw both GSPC.EMA.3 and
GSPC.EMA10 manually, and let the function terminate. All intended plots are
visible after the function terminates. So it isn't as if one wipes out the
other. This shows that it's possible to get all three lines on the plot, but
I can't figure out how to do it without manual intervention. Any suggestions
are appreciated.
Thanks.
*-- Russ *
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