slapmt (l) - Linux Manuals

slapmt: rearranges the columns of the M by N matrix X as specified by the permutation K(1),K(2),...,K(N) of the integers 1,...,N

NAME

SLAPMT - rearranges the columns of the M by N matrix X as specified by the permutation K(1),K(2),...,K(N) of the integers 1,...,N

SYNOPSIS

SUBROUTINE SLAPMT(
FORWRD, M, N, X, LDX, K )

    
LOGICAL FORWRD

    
INTEGER LDX, M, N

    
INTEGER K( * )

    
REAL X( LDX, * )

PURPOSE

SLAPMT rearranges the columns of the M by N matrix X as specified by the permutation K(1),K(2),...,K(N) of the integers 1,...,N. If FORWRD = .TRUE., forward permutation:

  X(*,K(J)) is moved X(*,J) for J = 1,2,...,N.
If FORWRD = .FALSE., backward permutation:

  X(*,J) is moved to X(*,K(J)) for J = 1,2,...,N.

ARGUMENTS

FORWRD (input) LOGICAL
= .TRUE., forward permutation = .FALSE., backward permutation
M (input) INTEGER
The number of rows of the matrix X. M >= 0.
N (input) INTEGER
The number of columns of the matrix X. N >= 0.
X (input/output) REAL array, dimension (LDX,N)
On entry, the M by N matrix X. On exit, X contains the permuted matrix X.
LDX (input) INTEGER
The leading dimension of the array X, LDX >= MAX(1,M).
K (input/output) INTEGER array, dimension (N)
On entry, K contains the permutation vector. K is used as internal workspace, but reset to its original value on output.

Pages related to slapmt

  • slapmt (3)
  • slapll (l) - two column vectors X and Y, let A = ( X Y )
  • sla_gbamv (l) - performs one of the matrix-vector operations y := alpha*abs(A)*abs(x) + beta*abs(y),
  • sla_gbrcond (l) - SLA_GERCOND Estimate the Skeel condition number of op(A) * op2(C) where op2 is determined by CMODE as follows CMODE = 1 op2(C) = C CMODE = 0 op2(C) = I CMODE = -1 op2(C) = inv(C) The Skeel condition number cond(A) = norminf( |inv(A)||A| ) is computed by computing scaling factors R such that diag(R)*A*op2(C) is row equilibrated and computing the standard infinity-norm condition number
  • sla_gbrfsx_extended (l) - computes ..
  • sla_geamv (l) - performs one of the matrix-vector operations y := alpha*abs(A)*abs(x) + beta*abs(y),
  • sla_gercond (l) - SLA_GERCOND estimate the Skeel condition number of op(A) * op2(C) where op2 is determined by CMODE as follows CMODE = 1 op2(C) = C CMODE = 0 op2(C) = I CMODE = -1 op2(C) = inv(C) The Skeel condition number cond(A) = norminf( |inv(A)||A| ) is computed by computing scaling factors R such that diag(R)*A*op2(C) is row equilibrated and computing the standard infinity-norm condition number
  • sla_gerfsx_extended (l) - computes ..