Index values

Index numeric vector to first value. By default, the index base will be 0, turning regular values into percentage change. In some cases, you may want to index to a different base, like 100, such as if you're looking at financial data.

calc_index(m, base = 0)

Arguments

m

Numeric vector to index to first value.

base

Base to index against. (Default: 0)

Value

An vector of indexed values.

Examples

calc_index(c(5, 2, 8, 17, 7, 3, 1, -4))
#> [1]  0.0 -0.6  0.6  2.4  0.4 -0.4 -0.8 -1.8
calc_index(c(5, 2, 8, 17, 7, 3, 1, -4), base = 100)
#> [1] 100  40 160 340 140  60  20 -80