[R] Data manipulation problem

[Erik Iverson]

?cut to create categories
?table to make the table

moleps wrote:
> Dear R´ers.
> 
> I´ve got a dataset with age and year of diagnosis. In order to age-standardize the incidence I need to transform the data into a matrix with age-groups (divided in 5 or 10 years) along one axis and year divided into 5 years along the other axis. Each cell should contain the number of cases for that age group and for that period. 
> 
> I.e.
> My data format now is
> ID-age (to one decimal)-year(yearly data).
> 
> What I´d like is 
> 
> 
> age 1960-1965 1966-1970 etc...
> 0-5 3 8 10 15
> 6-10 2 5 8 13
> etc..
> 
> 
> Any good ideas?
> 
> Regards,
> M
> 
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