[R] plotting time series with zoo pckg

[ahmad ajakh]

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