Nothing
tINV <- function(tnsr,tform)
{
# Performs inverse of 3-mode tensor using any
# discrete transform.
# Input: tnsr, a 3D tensor
# Output: The inverse of tnsr, a 3D tensor
if (tnsr@num_modes != 3)
stop("tINV only implemented for 3d so far")
modes <- tnsr@modes
n1 <- modes[1]
n2 <- modes[2]
n3 <- modes[3]
if (n1 !=n2)
stop("The inverse is only defined for square lateral faces")
if (tform=="fft") {
TI = tINVfft(tnsr)
} else if (tform=="dwt") {
TI = tINVdwt(tnsr)
} else if (tform=="dct") {
TI = tINVdct(tnsr)
} else if(tform=="dst") {
TI = tINVdst(tnsr)
} else if(tform=="dwht") {
TI = tINVdwht(tnsr)
} else if(tform=="dht") {
TI = tINVdht(tnsr)
} else {
stop("Transform not supported")
}
Tinv <- TI
return(Tinv)
}
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