View source: R/augment-ts-acceleration.R
ts_acceleration_augment | R Documentation |
Takes a numeric vector and will return the acceleration of that vector.
ts_acceleration_augment(.data, .value, .names = "auto")
.data |
The data being passed that will be augmented by the function. |
.value |
This is passed |
.names |
The default is "auto" |
Takes a numeric vector and will return the acceleration of that vector. The acceleration of a time series is computed by taking the second difference, so
(x_t - x_t1) - (x_t - x_t1)_t1
This function is intended to be used on its own in order to add columns to a tibble.
A augmented tibble
Steven P. Sanderson II, MPH
Other Augment Function:
ts_growth_rate_augment()
,
ts_velocity_augment()
suppressPackageStartupMessages(library(dplyr))
len_out = 10
by_unit = "month"
start_date = as.Date("2021-01-01")
data_tbl <- tibble(
date_col = seq.Date(from = start_date, length.out = len_out, by = by_unit),
a = rnorm(len_out),
b = runif(len_out)
)
ts_acceleration_augment(data_tbl, b)
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