[R-SIG-Finance] plot log scale on y axis using zoo object (with plot.zoo)

[Brian G. Peterson]

try chartSeries with log.scale=TRUE

On 03/31/2010 02:40 PM, Pierre Lapointe wrote:
> Hi,
>
> I'd like to plot a times series with a log on the y-axis. I'm plotting a zoo
> object as it is easier to format the dates on the x-axis. Unfortunately,
> log="y" does not work with plot.zoo. Any idea?
>
> Here's a reproducible example
>
> x<-seq(1,10000,length.out=10)
> plot(x,log="y",type="l")  #works
>
> z<- zoo(seq(1,10000,length.out=10),
>       as.Date(c("1992-01-10", "1992-01-17", "1992-01-24", "1992-01-31",
>         "1992-02-07", "1992-02-14", "1992-02-21", "1992-02-28", "1992-03-06",
>         "1992-03-13")))
> plot(z,log="y")          #gives error
>
> #Warning message:
> #In plot.xy(xy.coords(x, y), type = type, ...) :
> #  "log" is not a graphical parameter
>
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>
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-- 
Brian G. Peterson
http://braverock.com/brian/
Ph: 773-459-4973
IM: bgpbraverock