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cum_var calculates an accumulated variation of a rate, _var means the data must be a percentage variation.
cum_var(data, colnum, t, div100 = FALSE)
a dataframe
number of column
number of periods to accumulate
divide data by 100, use if data is not fraction
Return a dataframe.
# NOT RUN { v=data.frame(c(0.03,0.02,0.05)) cum_var(v,colnum=1,t=3) v=data.frame(c('3%','2%','5%')) v=colpct2num(v,start=1,div100=TRUE) cum_var(v,colnum=1,t=3) # }
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