tf_morlet: Perform Morlet time-frequency analysis
In kusumikakd/EEG: A collection of utilities for EEG analysis

Internal function for performing Morlet wavelet transforms using convolution in frequency domain

tf_morlet(
  data,
  foi,
  n_freq,
  n_cycles,
  keep_trials,
  output,
  downsample,
  demean = TRUE,
  lang = "R",
  verbose
)

`data`	Data in `eeg_epochs` format.
`foi`	Frequencies of interest. Scalar or character vector of the lowest and highest frequency to resolve.
`n_freq`	Number of frequencies to be resolved.
`n_cycles`	Number of cycles at each frequency.
`keep_trials`	Keep single trials or average over them before returning.
`output`	Sets whether output is power, phase, or fourier coefficients.
`downsample`	Downsampling factor (integer).
`demean`	Remove mean before transforming.
`lang`	defaults to R
`verbose`	Print informative messages in console.