step_fft_welch: step_fft_welch

In jkennel/hydrorecipes: Hydrogeology steps

step_fft_welch

Description

calculates the periodogram (estimate of spectral density) using Welch's method.

Usage

step_fft_welch(
  .rec,
  terms,
  length_subset,
  overlap = 0.8,
  window,
  time_step = 1,
  role = "augment",
  ...
)

Arguments

.rec	the R6 recipe object.
terms	the unquoted names of the variables to use or a selector function. terms replaces the '...' of the recipes package but requires variables to be included within 'c()'. For example to include variables x and y you would write 'c(x,y)' in the hydrorecipes package.
length_subset	length of fft section
overlap	amount of overlap
window	window weights
role	character - the name of the role
...	additional arguments

Value

an updated recipe

Examples

formula <- as.formula(y~.)

dat <- data.frame(x = rnorm(200),
                  y = rnorm(200))

frec = recipe(formula = formula, data = dat) |>
  step_fft_welch(c(x,y), length_subset = 10, window = window_rectangle(10))

jkennel/hydrorecipes documentation built on Dec. 24, 2024, 5:38 p.m.