condno {adlift} | R Documentation |
This function uses a specified norm to compute the condition number of a matrix representation of a wavelet transform.
condno(W, type)
W |
a matrix which represents a wavelet transform. |
type |
a character string denoting which norm to use when computing the condition number. Possible values are "l1" , or one of the standard norm types, "F" (Frobenius norm), "i" (infinity norm), "m" (max modulus of a matrix) or "1" (1-norm).
|
The function computes the condition number as condno
= ||W||*||W^{-1}||.
condno |
the condition number of the matrix W . |
The matrix W
must be invertible.
Matt Nunes (matt.nunes@bristol.ac.uk), Marina Popa (Marina.Popa@bristol.ac.uk)
#create test signal data # x<-runif(100) y<-make.signal2("blocks",x=x) # a<-transmatdual(x,y,Pred=AdaptNeigh,neigh=2) # #computes the transition matrix for the specified options # W<-a$Wnew # condno(W,"F") # condno(W,"l1") # condno(W,"1") #