hej
i'm plotting time-series and label the x-axis as follows:
r <- as.POSIXct(round(range(p1$time), "month"))
to define the time range for labeling the xaxis
plot(p1$time,p1$ p1, type="l", xaxt="n")
plots p1 against time
axis.POSIXct(1, at=seq(r[1], r[2], by="month"), format="%m")
labels the axis in mothly steps.
what I want do do now, is a second label for the x-axis, that stands lower and
indicates the years.
like 05 06 07 08 09 10 11 12 01 02 03 04 05 etc...
2004 2005
I don't know how to proceed with all the possibilities in axis, par and plot
thanks for your help
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