Dear all R users,

Suppose I have a data set like this:

date              price

1-Jan-02     4.8803747
2-Jan-02     4.8798430
3-Jan-02     4.8840133
4-Jan-02     4.8803747
5-Jan-02     4.8749683
6-Jan-02     4.8754263
7-Jan-02     4.8746628
8-Jan-02     4.8753500
9-Jan-02     4.8882416
10-Jan-02     4.8895217
11-Jan-02     4.8871108

I want to get a time series plot of that dataset. But in x-axis I want to
see the first day, and last day, and other day in between them  i.e.
1-Jan-02,  6-Jan-02, and  11-Jan-02 only. Can anyone tell me how to do that?

My second question is that is there any way to define a secondary axis like
Microsoft Excel in the same plot window?

Thanks and regards,
Arun

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