R中的Quantmod中的多个时间序列的叠加

Question

I want to create a chart using chartSeries with two or more time series on the SAME chart (overlaying each other). Bing/search doc have gotten me nowhere. Seems like should be fairly easy, I tried addTA, but didn't work. I tried the following code.

chartSeries(c(PSEC, ARCC), type = "line")

That resulted into this: (nevermind the fonts, the hell is the green blob?)

Answer 1

The green blob is what you asked R to plot. c(PSEC, ARCC) is the same as rbind(PSEC, ARCC) , which creates a single OHLCVA object with two observations per index value (one for PSEC, one for ARCC). You said you tried addTA , but it "didn't work". Saying something "doesn't work" does not help people help you, especially when you don't even show the code that "doesn't work".

Here's a chartSeries call that uses addTA , and a corresponding chart_Series version. Note that chart_Series automatically handles the y-axis range for you.

> chartSeries(Cl(PSEC), TA="addTA(Cl(ARCC), on=1)")
> chart_Series(Cl(PSEC), TA="add_TA(Cl(ARCC), on=1)")

Answer 2

Your data, if it is not daily, could easily look like a green blob.

For example, if that's minute-by-minute prices, I'd expect it to look like this upon visual inspection.