03-18-2008
9 More Discussions You Might Find Interesting
1. HP-UX
if user diag is removed with a -r will it delete usr/mds ? and if so will this prevent a system from booting?
Any info would be greatly appreciated!!
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Brian (1 Reply)
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I have 2 UNIX boxes and I need to determine whether or not they possess the same tape drive. What is the hardware command to determine what type of tape drive is present? Thx in advance. (4 Replies)
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I ran 'diag' command to verify disk follow the below steps.
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hi guys,
i'm new so don't bite too hard.
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Hello Everybody, we have a
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I have 2 solaris boxes and I need to check certain directories (on local filesystem and mounted nfs) to make sure that they match up on both boxes and to delete or move the other mismatches to elsewhere on the local filesystem.
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Hello,
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Hello Forum,
I'm making very good progress on my report thanks to the very helpful people on this forum. I've been able to successfully create my report for my Red Hat servers. But I do have a few ubuntu servers in the mix and I'd like to capture some data from them when an ssh connection is... (8 Replies)
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LEARN ABOUT REDHAT
sgeqp3
SGEQP3(l) ) SGEQP3(l)
NAME
SGEQP3 - compute a QR factorization with column pivoting of a matrix A
SYNOPSIS
SUBROUTINE SGEQP3( M, N, A, LDA, JPVT, TAU, WORK, LWORK, INFO )
INTEGER INFO, LDA, LWORK, M, N
INTEGER JPVT( * )
REAL A( LDA, * ), TAU( * ), WORK( * )
PURPOSE
SGEQP3 computes a QR factorization with column pivoting of a matrix A: A*P = Q*R using Level 3 BLAS.
ARGUMENTS
M (input) INTEGER
The number of rows of the matrix A. M >= 0.
N (input) INTEGER
The number of columns of the matrix A. N >= 0.
A (input/output) REAL array, dimension (LDA,N)
On entry, the M-by-N matrix A. On exit, the upper triangle of the array contains the min(M,N)-by-N upper trapezoidal matrix R; the
elements below the diagonal, together with the array TAU, represent the orthogonal matrix Q as a product of min(M,N) elementary
reflectors.
LDA (input) INTEGER
The leading dimension of the array A. LDA >= max(1,M).
JPVT (input/output) INTEGER array, dimension (N)
On entry, if JPVT(J).ne.0, the J-th column of A is permuted to the front of A*P (a leading column); if JPVT(J)=0, the J-th column
of A is a free column. On exit, if JPVT(J)=K, then the J-th column of A*P was the the K-th column of A.
TAU (output) REAL array, dimension (min(M,N))
The scalar factors of the elementary reflectors.
WORK (workspace/output) REAL array, dimension (LWORK)
On exit, if INFO=0, WORK(1) returns the optimal LWORK.
LWORK (input) INTEGER
The dimension of the array WORK. LWORK >= 3*N+1. For optimal performance LWORK >= 2*N+( N+1 )*NB, where NB is the optimal block-
size.
If LWORK = -1, then a workspace query is assumed; the routine only calculates the optimal size of the WORK array, returns this
value as the first entry of the WORK array, and no error message related to LWORK is issued by XERBLA.
INFO (output) INTEGER
= 0: successful exit.
< 0: if INFO = -i, the i-th argument had an illegal value.
FURTHER DETAILS
The matrix Q is represented as a product of elementary reflectors
Q = H(1) H(2) . . . H(k), where k = min(m,n).
Each H(i) has the form
H(i) = I - tau * v * v'
where tau is a real/complex scalar, and v is a real/complex vector with v(1:i-1) = 0 and v(i) = 1; v(i+1:m) is stored on exit in
A(i+1:m,i), and tau in TAU(i).
Based on contributions by
G. Quintana-Orti, Depto. de Informatica, Universidad Jaime I, Spain
X. Sun, Computer Science Dept., Duke University, USA
LAPACK version 3.0 15 June 2000 SGEQP3(l)