diffya | R Documentation |
Compute year-over-year difference for annual data
diffya(value, year)
value |
numeric vector |
year |
integer or numeric vector |
numeric vector
set.seed(1234) year <- 1970:1990 value <- 100 * (1 + .05 + rnorm(length(year), 0, .002)) cbind(year, value, diffya(value, year))
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