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rquantmod

Modify chart_Series theme

I am trying to change the colours of the bars using the theme argument, but I get an error:

library(quantmod)
getSymbols("SPY", from=Sys.Date()-500, to=Sys.Date())
chart_Series(SPY)
chart_Series(SPY,theme=chart_theme(dn.col = "cyan"))
# Error in chart_theme(dn.col = "cyan") : unused argument (dn.col = "cyan")
Solution

  • Look at the code. chart_theme takes no arguments, so trying chart_theme(dn.col="cyan") makes no sense.

    > args(chart_theme)
function () 
NULL

    chart_theme() returns a list and you want to modify portions of it, so just do that.

    myTheme <- chart_theme()
myTheme$col$dn.col <- "cyan"
chart_Series(SPY,theme=myTheme)