+++ /dev/null
-####################################################################
-##
-## File: aux.r
-##
-## Description: Miscelaneous functions for clustering with kcca
-##
-## Modified: june 2010
-##
-####################################################################
-
-
- #######################################################
-
- # Transforms a matrix of data (one observation by row)
- # into an array where position[ , , i] gives
- # the smoothed modulus of the i-th cwt observation
-
- ########################################################
-
-
-##NOTE: renvoie une matrice 3D
- toCWT <- function(X, sw= 0, tw= 0, swabs= 0,
- nvoice= 12, noctave= 5,
- s0= 2, w0= 2*pi, lt= 24, dt= 0.5,
- spectra = FALSE, smooth = TRUE,
- scaled = FALSE,
- scalevector)
- { noctave <- adjust.noctave(lt, dt, s0, tw, noctave)
- if(missing(scalevector))
- scalevector <- 2^(0:(noctave * nvoice) / nvoice) * s0
- res <- lapply(1:nrow(X), function(n)
- { tsX <- ts( X[n,] )
- tsCent <- tsX - mean(tsX)
- if(scaled) tsCent <- ts(scale(tsCent))
- tsCent.cwt <- cwt.ts(tsCent, s0, noctave, nvoice, w0)
- tsCent.cwt
- } )
- if( spectra ) res <- lapply(res, function(l) Mod(l)^2 )
- if( smooth ) res <- lapply(res, smCWT, swabs = swabs,
- tw = tw, dt = dt,
- scalevector = scalevector)
- resArray <- array(NA, c(nrow(res[[1]]), ncol(res[[1]]),
- length(res)))
- for( l in 1:length(res) ) resArray[ , , l] <- res[[l]]
- resArray
- }
-
-
- # ===============================================================
-
- smCWT <- function(CWT, sw= 0, tw= 0, swabs= 0,
- nvoice= 12, noctave= 2, s0= 2, w0= 2*pi,
- lt= 24, dt= 0.5, scalevector )
- {
-# noctave <- adjust.noctave(lt, dt, s0, tw, noctave)
-# scalevector <- 2^(0:(noctave * nvoice) / nvoice) * s0
- wsp <- Mod(CWT)
- smwsp <- smooth.matrix(wsp, swabs)
- smsmwsp <- smooth.time(smwsp, tw, dt, scalevector)
- smsmwsp
- }
-
-
- # ===============================================================
-
- toDWT <- function(x, filter.number = 6, family = "DaubLeAsymm")
-{ x2 <- spline(x, n = 2^ceiling( log(length(x), 2) ),
- method = 'natural')$y
- Dx2 <- wd(x2, family = family, filter.number = filter.number)$D
- Dx2
-}
-
- # ===============================================================
-
- contrib <- function(x)
- { J <- log( length(x)+1, 2)
- nrj <- numeric(J)
- t0 <- 1
- t1 <- 0
- for( j in 1:J ) {
- t1 <- t1 + 2^(J-j)
- nrj[j] <- sqrt( sum( x[t0:t1]^2 ) )
- t0 <- t1 + 1
- }
- return(nrj)
- }
-
-
- # ========================================= distance for coh ===
-
- coherence <- function( x, y)
- { J <- log(length(x) + 1, 2)
- t0 <- 1
- sg2_x <- 0
- sg2_y <- 0
- sg_xy <- 0
- for(j in 0:(J - 1))
- { t1 <- t0 + 2^(J - j)/2 - 1
- tt <- t0:t1
- sg2_x <- sg2_x + mean(x[t0:t1]^2)
- sg2_y <- sg2_y + mean(y[t0:t1]^2)
- sg_xy <- sg_xy + mean(x[t0:t1] * y[t0:t1])
- t0 <- t1 + 1
- }
- res <- sg_xy^2 / sg2_x / sg2_y
- res
- }
-
-
- vect2mat <- function(vect){
- vect <- as.vector(vect)
- matrix(vect[-(1:2)], delta, lscvect)
- }
-
-
- # ========================================= # myimg for graphics
- jet.colors <- colorRampPalette(c("#00007F", "blue", "#007FFF",
- "cyan", "#7FFF7F", "yellow",
- "#FF7F00", "red", "#7F0000"))
-
- myimg <- function(MAT, x = 1:nrow(MAT), y = 1:col(MAT), ... )
- filled.contour( x = x, y = y, z = MAT,
- xlab= 'Time', ylab= 'scale',
- color.palette = jet.colors,
- ... )
-
-