dzsum1.f(3) LAPACK dzsum1.f(3)NAME
dzsum1.f -
SYNOPSIS
Functions/Subroutines
DOUBLE PRECISION function dzsum1 (N, CX, INCX)
DZSUM1 forms the 1-norm of the complex vector using the true absolute value.
Function/Subroutine Documentation
DOUBLE PRECISION function dzsum1 (integerN, complex*16, dimension( * )CX, integerINCX)
DZSUM1 forms the 1-norm of the complex vector using the true absolute value.
Purpose:
DZSUM1 takes the sum of the absolute values of a complex
vector and returns a double precision result.
Based on DZASUM from the Level 1 BLAS.
The change is to use the 'genuine' absolute value.
Parameters:
N
N is INTEGER
The number of elements in the vector CX.
CX
CX is COMPLEX*16 array, dimension (N)
The vector whose elements will be summed.
INCX
INCX is INTEGER
The spacing between successive values of CX. INCX > 0.
Author:
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
September 2012
Contributors:
Nick Higham for use with ZLACON.
Definition at line 82 of file dzsum1.f.
Author
Generated automatically by Doxygen for LAPACK from the source code.
Version 3.4.2 Tue Sep 25 2012 dzsum1.f(3)
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dlar2v.f(3) LAPACK dlar2v.f(3)NAME
dlar2v.f -
SYNOPSIS
Functions/Subroutines
subroutine dlar2v (N, X, Y, Z, INCX, C, S, INCC)
DLAR2V
Function/Subroutine Documentation
subroutine dlar2v (integerN, double precision, dimension( * )X, double precision, dimension( * )Y, double precision, dimension( * )Z,
integerINCX, double precision, dimension( * )C, double precision, dimension( * )S, integerINCC)
DLAR2V
Purpose:
DLAR2V applies a vector of real plane rotations from both sides to
a sequence of 2-by-2 real symmetric matrices, defined by the elements
of the vectors x, y and z. For i = 1,2,...,n
( x(i) z(i) ) := ( c(i) s(i) ) ( x(i) z(i) ) ( c(i) -s(i) )
( z(i) y(i) ) ( -s(i) c(i) ) ( z(i) y(i) ) ( s(i) c(i) )
Parameters:
N
N is INTEGER
The number of plane rotations to be applied.
X
X is DOUBLE PRECISION array,
dimension (1+(N-1)*INCX)
The vector x.
Y
Y is DOUBLE PRECISION array,
dimension (1+(N-1)*INCX)
The vector y.
Z
Z is DOUBLE PRECISION array,
dimension (1+(N-1)*INCX)
The vector z.
INCX
INCX is INTEGER
The increment between elements of X, Y and Z. INCX > 0.
C
C is DOUBLE PRECISION array, dimension (1+(N-1)*INCC)
The cosines of the plane rotations.
S
S is DOUBLE PRECISION array, dimension (1+(N-1)*INCC)
The sines of the plane rotations.
INCC
INCC is INTEGER
The increment between elements of C and S. INCC > 0.
Author:
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
November 2011
Definition at line 111 of file dlar2v.f.
Author
Generated automatically by Doxygen for LAPACK from the source code.
Version 3.4.1 Sun May 26 2013 dlar2v.f(3)
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