Nothing
eegpsd <-
function(x, Fs, lower, upper, units = "dB",
xlab = NULL, ylab = NULL, zlab = NULL, ...){
###### Plot Power Spectral Density of EEG Data
###### Nathaniel E. Helwig (helwig@umn.edu)
###### Last modified: August 9, 2018
# fft of data
xfft <- eegfft(x, Fs, lower, upper)
# transform units?
units <- units[1]
if(units == "dB"){
xfft$strength <- 10 * log10(xfft$strength^2)
} else if(units == "mV^2"){
xfft$strength <- xfft$strength^2
}
# plot
if(is.data.frame(xfft)){
if(is.null(xlab)) xlab <- "Frequency (Hz)"
if(is.null(ylab)) ylab <- paste0("Power (", units, ")")
plot(xfft$frequency, xfft$strength,
xlab = xlab, ylab = ylab, ...)
} else {
if(is.null(xlab)) xlab <- "Frequency (Hz)"
if(is.null(ylab)) ylab <- "Channel"
if(is.null(zlab)) zlab <- paste0("Power (", units, ")")
nc <- ncol(xfft$strength)
imagebar(xfft$frequency, 1:nc, xfft$strength,
xlab = xlab, ylab = ylab, zlab = zlab, ...)
}
} # end eegpsd.R
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