plotting time series with zoo pckg

Dear Gabor,
Thank you for your quick reply.
This solution works for my univariate zoo class time series. I first tried
it for a timeseries with 4 columns of data, it did not plot the labels nor the
ticks, I tried it on a one dim timeseries (one column zoo class data as the example
in the question) and it worked!  is there something that I am missing?
Thanks again.
AA.


----- Original Message ----
From: Gabor Grothendieck <ggrothendieck at gmail.com>
To: ahmad ajakh <aajakh at yahoo.com>
Cc: r-help at stat.math.ethz.ch
Sent: Tuesday, December 26, 2006 8:31:07 PM
Subject: Re: [R] plotting time series with zoo pckg

Try this:


# test data
library(zoo)
z <- structure(c(21, 34, 33, 41, 39, 38, 37, 28, 33, 40),
    index = structure(c(8044, 8051, 8058, 8065, 8072, 8079, 8086,
    8093, 8100, 8107), class = "Date"), class = "zoo")
z

# plot without X axis
plot(z, xaxt = "n")

# unlabelled tick at each point
axis(1, time(z), lab = FALSE)

# labelled tick every third point
dd <- time(z)[seq(1, length(z), 3)]
axis(1, dd, as.character(dd), cex.axis = 0.7, tcl = -0.7)



On 12/26/06, ahmad ajakh <aajakh at yahoo.com> wrote:

Hi all,

I am using the zoo package to plot time series. I have a problem with formatting the axes.
my zoo object (z) looks like the following.

               c1
1992-01-10     21
1992-01-17     34
1992-01-24     33
1992-01-31     41
1992-02-07     39
1992-02-14     38
1992-02-21     37
1992-02-28     28
1992-03-06     33
1992-03-13     40

plot.zoo(z) produces a plot with the labels on the x-axis that I cannot control.
I want a an xtick every 10 data points with corresponding date labels.
I have tried different combination of axis command without success
any idea?
Thanks