simple question

[Eric yang <yang_eric9@yahoo.com>]

 

Dear all,

 

Can someone help me with a very simple question. Suppose I have the dates

 

 

my.dates <- c("03/01/05", "04/01/05", "05/01/05", "06/01/05", "07/01/05", "08/01/05", "09/01/05", "10/01/05", "11/01/05", "12/01/05", "01/01/06", "02/01/06", "03/01/06", "04/01/06", "05/01/06", "06/01/06", "07/01/06", "08/01/06", "09/01/06", "10/01/06", "11/01/06")

 

 

and I want to split the my.dates into a sequence related to the quarterly period, i.e. grouping into ("01", "02", "03"), ("04", "05", "06"), ("07", "08", "09") and ("10", "11", "12")

 

to give

> my.sequence

[1] 1 2 2 2 3 3 3 4 4 4 5 5 5 6 6 6 7 7 7 8 8

Thanks in advance for any help.

 

Regards

Eric

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