growth: calculate growth of a series

In Nisus-Liu/CompositeIndex: Composite Index

Description

calculate some type of growth such as rate of increase, symmetrical rate, in addition get chain relative ratio or other type ratios by specifying gap.

Usage

growth(x, diff_gap = 1, method = c("division", "difference", "auto"),
  symrate = FALSE, standard = FALSE)

Arguments

x	a numeric vector
diff_gap	the gap of calculating rate, you can get year on year rate of a annual series by specifing diff_gap for 12.
method	division: (x_t-x_{t-1})/x_{t-1}; difference: x_t-x_{t-1}; auto: select method automatically.
symrate	symmetry rate if TRUE.
standard	whether to standard the ratio. FALSE:no, TRUE:yes.

Examples

x = 1:30
growth(x, method = "division" )
growth(x, method = 2)
growth(x, method = 3, symrate = T)
x[2] = -2
growth(x, method = 3, symrate = T)

Nisus-Liu/CompositeIndex documentation built on May 7, 2019, 6:18 p.m.