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#' Circular left shift of 1-d signal
#'
#' @export lshift
#' @param a 1-d signal.
#' @return \code{l} 1-d signal l(i) = x(i+1) except l(n) = x(1).
#' @examples
#' x <- MakeSignal('HeaviSine',2^3)
#' lshift(x)
lshift <- function(a) {
return(c(a[2:length(a)], a[1]))
}
# Copyright (c) 1993. Iain M. Johnstone
# Part of WaveLab Version 802 Built Sunday, October 3, 1999 8:52:27 AM This
# is Copyrighted Material For Copying permissions see COPYING.m Comments?
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