On Sep 9, 2013, at 9:00 AM, Cech, Christian wrote:
> Dear all,
>
> I want to create a line-plot with two lines and some additional scatter-plots.
> However, adding a line to the plot does not work when I specify the
> y-argument in the plot command, while it does work when y is not specified.
>
> I first send you an example that works:
> plot(var[, 3],
> type="l",
> ylim=c(-0.04, 0),
> ylab = 'portfolio returns',
> xlab = 'time')
> lines(var[, 5], type="l", lty=3)
> for (i in 1:nrow(var)) {
> if(var[i, 4] | var[i,6])
> points(i, var[i, 2], pch=4)
> }
>
> --> the result is displayed in attachment "Plot1.pdf"
>
> What does not work is the following code, where as the first argument of plot
> (ie the y-argument) is defined:
> plot(as.Date(var[, 1], origin="1899-12-30"),
> var[, 3],
> type="l",
> ylim=c(-0.04, 0),
> ylab='portfolio returns',
> xlab='time')
> lines(var[, 5], type="l", lty=3)
> for (i in 1:nrow(var)) {
> if(var[i, 4] | var[i,6])
> points(i, var[i, 2], pch=4)
> }
>
> --> the result is displayed in attachment "Plot2.pdf"
>
> The same problem appears if instead of
>
> as.Date(var[, 1], origin="1899-12-30")
>
> I use
>
> var[, 1]
>
> to define the y-argument.
This puzzles me. At the moment yu are using postional matching and it is
var[,3] that would be matched to the y argument.
You need to post output of str(var) so that we can see the class of var[,1].
>
--
David Winsemius
Alameda, CA, USA
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