Environmental noise wrapper

Adapts periodogram and calculates the 'colour' of the noise of unpredicted de-trended residuals

noise_calc(
  resid_time_series,
  predictor,
  noise_method = c("spectrum", "lomb_scargle")
)

Arguments

resid_time_series	A `numeric` vector containing unpredicted de-trended residuals as obtained by function `monthly_bins`.
predictor	A `numeric` vector containing the time (in days) for each observation in `resid_time_series`. Needs to start at day 0.
noise_method	A method for estimating the slope beta. Takes 2 possible values: `'spectrum'` for evenly distributed time series or `'lomb_scargle'` for unevenly distributed ones.

A list containing the beta slope, the original spec_obj data.frame, and the fitted linear model.

This function calculates beta slope (assuming 1/f noise family) on the residual time series using function spec_slope_get.

Diego Barneche and Scott Burgess.