DLATZM
Purpose
This routine is deprecated and has been replaced by routine DORMRZ.
DLATZM applies a Householder matrix generated by DTZRQF to a matrix.
Let P = I - tau*u*u**T, u = ( 1 ),
( v )
where v is an (m-1) vector if SIDE = 'L', or a (n-1) vector if
SIDE = 'R'.
If SIDE equals 'L', let
C = [ C1 ] 1
[ C2 ] m-1
n
Then C is overwritten by P*C.
If SIDE equals 'R', let
C = [ C1, C2 ] m
1 n-1
Then C is overwritten by C*P.
DLATZM applies a Householder matrix generated by DTZRQF to a matrix.
Let P = I - tau*u*u**T, u = ( 1 ),
( v )
where v is an (m-1) vector if SIDE = 'L', or a (n-1) vector if
SIDE = 'R'.
If SIDE equals 'L', let
C = [ C1 ] 1
[ C2 ] m-1
n
Then C is overwritten by P*C.
If SIDE equals 'R', let
C = [ C1, C2 ] m
1 n-1
Then C is overwritten by C*P.
Arguments
| SIDE |
(input) CHARACTER*1
= 'L': form P * C
= 'R': form C * P |
| M |
(input) INTEGER
The number of rows of the matrix C.
|
| N |
(input) INTEGER
The number of columns of the matrix C.
|
| V |
(input) DOUBLE PRECISION array, dimension
(1 + (M-1)*abs(INCV)) if SIDE = 'L'
(1 + (N-1)*abs(INCV)) if SIDE = 'R' The vector v in the representation of P. V is not used if TAU = 0. |
| INCV |
(input) INTEGER
The increment between elements of v. INCV <> 0
|
| TAU |
(input) DOUBLE PRECISION
The value tau in the representation of P.
|
| C1 |
(input/output) DOUBLE PRECISION array, dimension
(LDC,N) if SIDE = 'L'
(M,1) if SIDE = 'R' On entry, the n-vector C1 if SIDE = 'L', or the m-vector C1 if SIDE = 'R'. On exit, the first row of P*C if SIDE = 'L', or the first column of C*P if SIDE = 'R'. |
| C2 |
(input/output) DOUBLE PRECISION array, dimension
(LDC, N) if SIDE = 'L'
(LDC, N-1) if SIDE = 'R' On entry, the (m - 1) x n matrix C2 if SIDE = 'L', or the m x (n - 1) matrix C2 if SIDE = 'R'. On exit, rows 2:m of P*C if SIDE = 'L', or columns 2:m of C*P if SIDE = 'R'. |
| LDC |
(input) INTEGER
The leading dimension of the arrays C1 and C2. LDC >= (1,M).
|
| WORK |
(workspace) DOUBLE PRECISION array, dimension
(N) if SIDE = 'L'
(M) if SIDE = 'R' |