stftcalc: calculate the fft components
In GENEAread: Package for Reading Binary Files

stftcalc calculating the short time fourier transform component

stftcalc(
  X,
  win = 10,
  inc = win/2,
  coef = Inf,
  wtype = "hanning.window",
  freq,
  centre = T,
  calc.null = F,
  pvalues = F,
  time = NULL,
  reassign = T,
  quiet = F
)

`win`	Window size in number of recordings to use.
`inc`	increment size from one window to the next
`coef`	Number of fourier frequencies to compute. Small values will remove the higher frequencies from the processed object. Defaults to the maximum, win/2.
`wtype`	Window type for the STFT calculation.
`freq`	frequency of dataset. If missing and length(time) > 1, freq =(length(time) -1) /( max(time) - min(time) ) If just missing, freq = 1
`centre`	If TRUE (Default), centre the data in each window before processing is done. Useful for avoiding excessively large DC offset coefficients in results.
`calc.null`	If TRUE (Defaults to FALSE), compute a 'null' STFT by resampling the data completely, then doing a STFT.
`pvalues`	If TRUE (Defaults to FALSE) Compute bootstrapped pvalues for each position by resampling within each window and applying a wilcox test.
`time`	Allows the user to set an overriding timestamp vector to be used for processing.
`reassign`	logical. If TRUE, compute the time-reassigned STFT. For type %in% c("mv", "sum"), this is done with the first coordinate in mv.indices.
`quiet`	If TRUE, suppress output.
`x`	The dataset to be processed