ksh93 supports multidimensional arrays. Here is a simple example.
outputs
I think, but have not verified, that zsh also supports multidimensional arrays.
Hello one and all,
I have a basic background in UNIX, but I was wondering if there is a way to perform simple mathematical equations (like multiplication, addition)? If so, is there a way to multiply values from a column by a value to produce a column with the answers? :confused:
I am... (4 Replies)
Hi all,
Even after reading many explanation the question still haunting me what's the difference between physical and linear addresses.Can we directly access physical addresses .If not then paging circuitry would have ensure contiguous physical addresses regardless of any linear addresses but this... (2 Replies)
I`m having a cluster with Rocks 5.2 distribution and I want to solve differential equations and I`m interested to know if are some programs already developed to do this. (3 Replies)
Given an in-between(any node not at the start and end of the linked list) node within a singly linear linked list, how to delete that node, when head pointer of list is not given? (13 Replies)
Hi,
I'm looking for linear hashing implementation in C language. Please help.
PS: I have implement this on Ubuntu 10.04 Linux on 64 bit machine. (1 Reply)
I really know barely anything about awk and the like but I have a bit of code I need help with.
The bash script is meant to get my usage numbers from my ISP and it does so perfectly. However I want to know how much I can use each day. So to do this I would need to divide its output by the number... (5 Replies)
count=`cat /filecount.txt | tail -1 |head -1| awk '{print $1}'`
exact_count=`expr $value \* 24`
i want to subtract a="$exact_count" - "$count"
but its not taking o/p of "count" as number
$a is wrong answer
hence not getting proper output.
plz help me out
:confused:
Please use... (3 Replies)
Hi everyone,
I am trying to write a bash script which reads a data file and does some algebraic operations.
here is the structure of data.xml file that I have;
1 <data>
2 .
3 .
4 .
5 </data>
6 <data>
7 .
8 .
9 .
10</data>
etc.
Each data block contains same number of lines (say... (4 Replies)
Discussion started by: hayreter
4 Replies
LEARN ABOUT REDHAT
sgbtrs
SGBTRS(l) ) SGBTRS(l)
NAME
SGBTRS - solve a system of linear equations A * X = B or A' * X = B with a general band matrix A using the LU factorization computed by
SGBTRF
SYNOPSIS
SUBROUTINE SGBTRS( TRANS, N, KL, KU, NRHS, AB, LDAB, IPIV, B, LDB, INFO )
CHARACTER TRANS
INTEGER INFO, KL, KU, LDAB, LDB, N, NRHS
INTEGER IPIV( * )
REAL AB( LDAB, * ), B( LDB, * )
PURPOSE
SGBTRS solves a system of linear equations A * X = B or A' * X = B with a general band matrix A using the LU factorization computed by SGB-
TRF.
ARGUMENTS
TRANS (input) CHARACTER*1
Specifies the form of the system of equations. = 'N': A * X = B (No transpose)
= 'T': A'* X = B (Transpose)
= 'C': A'* X = B (Conjugate transpose = Transpose)
N (input) INTEGER
The order of the matrix A. N >= 0.
KL (input) INTEGER
The number of subdiagonals within the band of A. KL >= 0.
KU (input) INTEGER
The number of superdiagonals within the band of A. KU >= 0.
NRHS (input) INTEGER
The number of right hand sides, i.e., the number of columns of the matrix B. NRHS >= 0.
AB (input) REAL array, dimension (LDAB,N)
Details of the LU factorization of the band matrix A, as computed by SGBTRF. U is stored as an upper triangular band matrix with
KL+KU superdiagonals in rows 1 to KL+KU+1, and the multipliers used during the factorization are stored in rows KL+KU+2 to
2*KL+KU+1.
LDAB (input) INTEGER
The leading dimension of the array AB. LDAB >= 2*KL+KU+1.
IPIV (input) INTEGER array, dimension (N)
The pivot indices; for 1 <= i <= N, row i of the matrix was interchanged with row IPIV(i).
B (input/output) REAL array, dimension (LDB,NRHS)
On entry, the right hand side matrix B. On exit, the solution matrix X.
LDB (input) INTEGER
The leading dimension of the array B. LDB >= max(1,N).
INFO (output) INTEGER
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value
LAPACK version 3.0 15 June 2000 SGBTRS(l)