?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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