Nothing
### Generalized Schur form in complex*16 precision.
#
# Call "src/R_zgges.c" wrap "src/zgges.f".
# See "src/zgges.f" for details notations.
#
# (A,B) = ( (VSL)*S*(VSR)**H, (VSL)*T*(VSR)**H )
#
# where (VSR)**H is the conjugate-transpose of VSR.
#
qz.zgges <- function(A, B, vsl = TRUE, vsr = TRUE, LWORK = NULL){
# Check
if(!(is.complex(A) && is.complex(B))){
stop("A and B should be in complex.")
}
if(!(is.matrix(A) && is.matrix(B))){
stop("A and B should be in matrix.")
}
if(any(dim(A) != dim(B))){
stop("Dimensions of A and B should be equal.")
}
if(dim(A)[1] != dim(A)[2]){
stop("Squared matrices are required.")
}
# Prepare
JOBVSL <- ifelse(vsl, "V", "N")
JOBVSR <- ifelse(vsr, "V", "N")
SORT <- "N" # WCC: TODO
SELCTG <- 0L # WCC: TODO, no effect if SORT = "N".
N <- as.integer(ncol(A))
# S <- A # WCC: memory copy, done in C.
LDA <- as.integer(N)
# T <- B # WCC: memory copy, done in C.
LDB <- as.integer(N)
SDIM <- as.integer(0L) # WCC: TODO, no effect if SORT = "N".
ALPHA <- complex(N)
BETA <- complex(N)
if(vsl){
LDVSL <- as.integer(N)
VSL <- complex(LDVSL * N)
dim(VSL) <- c(LDVSL, N)
} else{
LDVSL <- as.integer(1)
VSL <- complex(LDVSL)
}
if(vsr){
LDVSR <- as.integer(N)
VSR <- complex(LDVSR * N)
dim(VSR) <- c(LDVSR, N)
} else{
LDVSR <- as.integer(1)
VSR <- complex(LDVSR)
}
if(is.null(LWORK) || LWORK < 2 * N){
LWORK <- as.integer(2 * N)
} else{
LWORK <- as.integer(LWORK)
}
WORK <- complex(LWORK)
RWORK <- double(8 * N)
BWORK <- integer(N) # WCC: TODO, no effect if SORT = "N".
INFO <- integer(1)
# Run
ret <- .Call("R_zgges",
JOBVSL, JOBVSR, SORT, SELCTG, N,
A, LDA, B, LDB, SDIM,
ALPHA, BETA, VSL, LDVSL, VSR, LDVSR,
WORK, LWORK, RWORK, BWORK,
INFO,
PACKAGE = "QZ")
# Return
ret$ALPHA <- ALPHA
ret$BETA <- BETA
if(vsl){
ret$VSL <- VSL
} else{
ret$VSL <- NULL
}
if(vsr){
ret$VSR <- VSR
} else{
ret$VSR <- NULL
}
ret$WORK <- WORK[1]
ret$INFO <- INFO
# Extra returns
if(vsl){
ret$Q <- VSL
} else{
ret$Q <- NULL
}
if(vsr){
ret$Z <- VSR
} else{
ret$Z <- NULL
}
class(ret) <- "zgges"
ret
} # End of qz.zgges().
### S3 method.
print.zgges <- function(x, digits = max(4, getOption("digits") - 3), ...){
op.org <- options()
options(digits = digits)
cat("ALPHA:\n")
print(x$ALPHA)
cat("\nBETA:\n")
print(x$BETA)
cat("S:\n")
print(x$S)
cat("\nT:\n")
print(x$T)
if(! is.null(x$Q)){
cat("\nQ:\n")
print(x$Q)
}
if(! is.null(x$Z)){
cat("\nZ:\n")
print(x$Z)
}
options(op.org)
invisible()
} # end of print.zggev().
Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.