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#' Signal/Noise ratio
#'
#' @export SNR
#' @param x Original reference signal.
#' @param y Restored or noisy signal.
#' @return Signal/Noise ratio.
#' @examples
#' n <- 2^4
#' x <- MakeSignal('HeaviSine', n)
#' y <- x + rnorm(n, mean=0, sd=1)
#' SNR(x, y)
SNR <- function(x, y) {
v <- 20 * log10(normvec(as.vector(x))/normvec(as.vector(x) - as.vector(y)))
return(v)
}
# Written by Maureen Clerc and Jerome Kalifa, 1997
# clerc@cmapx.polytechnique.fr, kalifa@cmapx.polytechnique.fr
# Part of Wavelab Version 850 Built Tue Jan 3 13:20:39 EST 2006 This is
# Copyrighted Material For Copying permissions see COPYING.m Comments? e-mail
# wavelab@stat.stanford.edu
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