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2009 Feb 22
0
calculating compound growth rates - creating a flexible function
R-listers I am still finding my way with R - and feel that I am making a complete dogs dinner of something that should be pretty simple. What I'd like to do is to create a simple function that i can use to calculate compound growth rates (CAGRs) over a data frame. I'd like the function to be flexible enough to vary the time period and to run over 'panel data'. The issue is that I can get a function to work over one variable, but cant figure out how to generalise it, specifically ... how do i get the original variable to be...