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At the beginning of the month I always need to calculate the age of people within a certain database. I always consider the last date of that month, for example: in September I calculated the age using the date of 30 September as a reference, so everyone who was born within this month I consider with one year more complete. Is there a function that will return me the final date of a given month so I can automate the task, or I will have to do it manually?
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With the following function, you get the last days of the months following a given last day of month
seq_monthly <- function(from,length.out) {
return(from %m+% months(c(0:(length.out-1))))
}
It uses the function %m+% package lubridate. You can then create a vector with all the last days of a given year
seq_monthly(as.Date("????-01-31"),length.out=12)
and index within its function the reference month. I found this function in an English OS topic.
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