10 More Discussions You Might Find Interesting
1. Open Source
I have a process that requires me to read data from huge log files and find the most recent entry on a per-user basis. The number of users may fluctuate wildly month to month, so I can't code for it with names or a set number of variables to capture the data, and the files are large so I don't... (7 Replies)
Discussion started by: rbatte1
7 Replies
2. UNIX for Dummies Questions & Answers
I am not able to capture the user input in this script(bash).There is prompt for user input.Could some one help me capture user input while reading afile?
while read line
do
echo "$i"
path1=$line
path2=`echo $line|sed s/new_dir/old_dir/`
echo "Do you want to replace?";... (4 Replies)
Discussion started by: parijat guh
4 Replies
3. Shell Programming and Scripting
Hello,
I'm trying to write an awk program that reads two files inputs.
example,
file 1:
0.00017835
0.000176738
0.00018811
0.000189504
0.000188155
0.000180065
0.000178991
0.000178252
0.000182513
file 2:
1.7871769E-05 1.5139576E-16 1.5140196E-16 1.5139874E-16
1.7827407E-04 ... (5 Replies)
Discussion started by: joseamck
5 Replies
4. UNIX for Dummies Questions & Answers
Hi,
I need to read the date from the input file. The format of the input file is as follows:
a_b_c_yyyymmdd.txt
I need to read the date(yyyymmdd) part from the name of the input file.
Would really appreciate if someone can help me in this regard
Thanks a lot. (1 Reply)
Discussion started by: Sunny_teotia
1 Replies
5. Shell Programming and Scripting
Can I do something like,
if($0==/^int.*$/) {
print "Declaration"
}
for an input like: int a=5;
If the syntax is right, it is not working for me, but I am not sure about the syntax. Please help.
Thanks,
Prasanna (1 Reply)
Discussion started by: prasanna1157
1 Replies
6. Shell Programming and Scripting
Hello,
Could somebody please give me an awk example on how to read from the standard input.
It means as the "read" function in Korn shell.
Thx in advance ... (3 Replies)
Discussion started by: rany1
3 Replies
7. Shell Programming and Scripting
Hi guys,
I am new to AWK and unix scripting. Please see below my problem and let me know if anyone you can help.
I have 2 input files (example given below)
Input file 2 is a standard file (it will not change) and we have to get the name (second column after comma) from it and append it... (5 Replies)
Discussion started by: sksahu
5 Replies
8. Shell Programming and Scripting
I am trying to read input for a C program (that expects input from the user) from a file using the shell command:
progname < filename
but it seems that the program considers the char '<'
as the first input, hence causing an "error" in my program.
I checked it with another program and it... (2 Replies)
Discussion started by: nadbar
2 Replies
9. Shell Programming and Scripting
Hi people. I am new to shell scripting, so I need a little help. I want to create a script named that takes an argument as a file, Read the input file and look for occurrences of the current username (say abc.xyz) who is executing the script. On finding an occurrence of the username take that line... (2 Replies)
Discussion started by: kartikkumar84@g
2 Replies
10. Shell Programming and Scripting
I'm reading 2 input files but not getting expected value.
I should get an alpha value on file_1_data but not getting any.
Please help.
>cat test6.sh
awk '
FILENAME==ARGV { file_1_data=$0; print "----- 1 Line " NR " -----" $1; next }
FILENAME==ARGV { file_2_data=$0; print "----- 2... (1 Reply)
Discussion started by: pdtak
1 Replies
SGELSS(l) ) SGELSS(l)
NAME
SGELSS - compute the minimum norm solution to a real linear least squares problem
SYNOPSIS
SUBROUTINE SGELSS( M, N, NRHS, A, LDA, B, LDB, S, RCOND, RANK, WORK, LWORK, INFO )
INTEGER INFO, LDA, LDB, LWORK, M, N, NRHS, RANK
REAL RCOND
REAL A( LDA, * ), B( LDB, * ), S( * ), WORK( * )
PURPOSE
SGELSS computes the minimum norm solution to a real linear least squares problem: Minimize 2-norm(| b - A*x |).
using the singular value decomposition (SVD) of A. A is an M-by-N matrix which may be rank-deficient.
Several right hand side vectors b and solution vectors x can be handled in a single call; they are stored as the columns of the M-by-NRHS
right hand side matrix B and the N-by-NRHS solution matrix X.
The effective rank of A is determined by treating as zero those singular values which are less than RCOND times the largest singular value.
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.
NRHS (input) INTEGER
The number of right hand sides, i.e., the number of columns of the matrices B and X. NRHS >= 0.
A (input/output) REAL array, dimension (LDA,N)
On entry, the M-by-N matrix A. On exit, the first min(m,n) rows of A are overwritten with its right singular vectors, stored row-
wise.
LDA (input) INTEGER
The leading dimension of the array A. LDA >= max(1,M).
B (input/output) REAL array, dimension (LDB,NRHS)
On entry, the M-by-NRHS right hand side matrix B. On exit, B is overwritten by the N-by-NRHS solution matrix X. If m >= n and
RANK = n, the residual sum-of-squares for the solution in the i-th column is given by the sum of squares of elements n+1:m in that
column.
LDB (input) INTEGER
The leading dimension of the array B. LDB >= max(1,max(M,N)).
S (output) REAL array, dimension (min(M,N))
The singular values of A in decreasing order. The condition number of A in the 2-norm = S(1)/S(min(m,n)).
RCOND (input) REAL
RCOND is used to determine the effective rank of A. Singular values S(i) <= RCOND*S(1) are treated as zero. If RCOND < 0, machine
precision is used instead.
RANK (output) INTEGER
The effective rank of A, i.e., the number of singular values which are greater than RCOND*S(1).
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 >= 1, and also: LWORK >= 3*min(M,N) + max( 2*min(M,N), max(M,N), NRHS ) For good perfor-
mance, LWORK should generally be larger.
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.
> 0: the algorithm for computing the SVD failed to converge; if INFO = i, i off-diagonal elements of an intermediate bidiagonal
form did not converge to zero.
LAPACK version 3.0 15 June 2000 SGELSS(l)