I have few days to complete my awk homework. But I'm stucked. i hope some1 will help me out.
I have to inverse n x n matrix, but I have problems with finding the determinant of the matrix.
I found the algoritm, how to find a determinant of n x n matrix:... (0 Replies)
I need to inverse a matrix given in a file.
The problem is I'm stuck with writing determinant finding algoritm into code.
I found this algoritm about finding determinant of nxn matrix. This is what i need:
Matrices and Determinants
and here:
a11 a12 a13
a21 a22 a23
a31 a32 a33... (0 Replies)
hi there
I'm very new in programing and i've started with awk.
I'm processing 200 data files and I need to do some precessing on them.
The files have 3 columns with N-lines
for each line a have on the first and second value is the same for all the files and only the third is variable. like... (2 Replies)
Hi Experts,
I am adding a column of numbers with awk , however not getting correct output:
# awk '{sum+=$1} END {print sum}' datafile
2.15291e+06
How can I getthe output like : 2152910
Thank you..
# awk '{sum+=$1} END {print sum}' datafile
2.15079e+06 (3 Replies)
Howdy,
I need to convert an association data matrix, currently in a two-column format, into a matrix with numbers indicating the number of associations. I've been looking around for AWK code in the list, but could not find anything. Here's an example of what I want to perform:
original... (10 Replies)
Hi everyone
I am very new at awk but think that that might be the best strategy for this. I have a matrix very similar to a correlation matrix and in practical terms I need to convert it into a list containing the values from the matrix (one value per line) with the first field of the line (row... (5 Replies)
Hi there,
If anyone can help me sorting out this small task would be great. Given a matrix like the following:
100 3 3 3 3 3 ...
200 5 5 5 5 5 ...
400 1 1 1 1 1 ...
500 8 8 8 8 8 ...
900 0 0 0 0... (5 Replies)
Hi, every one. I have two files ,one is in matrix like this, one is a list with the same data as the matrix.
AB AE AC AD AA AF
SA 3 4 5 6 4 6
SC 5 7 2 8 4 3
SD 4 6 5 3 8 3
SE 45 ... (5 Replies)
Hi all,
I have a large matrix of 720 x 25. I want to get sum of range of rows and columns. Like, I need sum of all columns and row number 2 to 21, then leaving 22nd row, again sum of all columns and row number 23 to 42 again leaving 43rd row and then sum of 44th to 63. Means I want to add all... (4 Replies)
How can i convert two columns in to o and 1 matrix. thnks
Input
a c1
b c2
c c1
d c3
e c4
output
c1 c2 c3 c4
a 1 0 0 0
b 0 1 0 0
c 1 0 0 0
d 0 0 ... (5 Replies)
Discussion started by: quincyjones
5 Replies
LEARN ABOUT MOJAVE
english5.18
English(3pm) Perl Programmers Reference Guide English(3pm)NAME
English - use nice English (or awk) names for ugly punctuation variables
SYNOPSIS
use English;
use English qw( -no_match_vars ) ; # Avoids regex performance penalty
# in perl 5.16 and earlier
...
if ($ERRNO =~ /denied/) { ... }
DESCRIPTION
This module provides aliases for the built-in variables whose names no one seems to like to read. Variables with side-effects which get
triggered just by accessing them (like $0) will still be affected.
For those variables that have an awk version, both long and short English alternatives are provided. For example, the $/ variable can be
referred to either $RS or $INPUT_RECORD_SEPARATOR if you are using the English module.
See perlvar for a complete list of these.
PERFORMANCE
NOTE: This was fixed in perl 5.20. Mentioning these three variables no longer makes a speed difference. This section still applies if
your code is to run on perl 5.18 or earlier.
This module can provoke sizeable inefficiencies for regular expressions, due to unfortunate implementation details. If performance matters
in your application and you don't need $PREMATCH, $MATCH, or $POSTMATCH, try doing
use English qw( -no_match_vars ) ;
. It is especially important to do this in modules to avoid penalizing all applications which use them.
perl v5.18.2 2014-01-06 English(3pm)