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Full Discussion: Adding the individual columns of a matrix.
Top Forums Shell Programming and Scripting Adding the individual columns of a matrix. Post 302520751 by shoaibjameel123 on Monday 9th of May 2011 05:59:01 AM
Old 05-09-2011
Adding the individual columns of a matrix.
I have a huge matrix file containing some 1.5 million rows and 6000 columns. The matrix looks something like this:

Code:
1 2 3
4 5 6
7 8 9
3 4 5

I want to add all the numbers in the columns of this matrix and display the result to my stdout. This means that the numbers in the first column are:

Code:
1
4
7
3

When I add all of them up the result is 15 and in this way the sum of numbers present in the second column is 19 and third is 23. Hence my output should look like this:

Code:
15
19
23

I can add the numbers in the first column like this:

Code:
more matrix.mtx | awk '{sum+=$1} END {print sum}'

But don't know how to do it for the entire matrix of 6000 columns.
 

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LEARN ABOUT CENTOS

clapmt.f

clapmt.f(3)							      LAPACK							       clapmt.f(3)

NAME

       clapmt.f -

SYNOPSIS

   Functions/Subroutines
       subroutine clapmt (FORWRD, M, N, X, LDX, K)
	   CLAPMT performs a forward or backward permutation of the columns of a matrix.

Function/Subroutine Documentation
   subroutine clapmt (logicalFORWRD, integerM, integerN, complex, dimension( ldx, * )X, integerLDX, integer, dimension( * )K)
       CLAPMT performs a forward or backward permutation of the columns of a matrix.

       Purpose:

	    CLAPMT rearranges the columns of the M by N matrix X as specified
	    by the permutation K(1),K(2),...,K(N) of the integers 1,...,N.
	    If FORWRD = .TRUE.,  forward permutation:

		 X(*,K(J)) is moved X(*,J) for J = 1,2,...,N.

	    If FORWRD = .FALSE., backward permutation:

		 X(*,J) is moved to X(*,K(J)) for J = 1,2,...,N.

       Parameters:
	   FORWRD

		     FORWRD is LOGICAL
		     = .TRUE., forward permutation
		     = .FALSE., backward permutation

	   M

		     M is INTEGER
		     The number of rows of the matrix X. M >= 0.

	   N

		     N is INTEGER
		     The number of columns of the matrix X. N >= 0.

	   X

		     X is COMPLEX array, dimension (LDX,N)
		     On entry, the M by N matrix X.
		     On exit, X contains the permuted matrix X.

	   LDX

		     LDX is INTEGER
		     The leading dimension of the array X, LDX >= MAX(1,M).

	   K

		     K is INTEGER array, dimension (N)
		     On entry, K contains the permutation vector. K is used as
		     internal workspace, but reset to its original value on
		     output.

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   September 2012

       Definition at line 105 of file clapmt.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.2							  Tue Sep 25 2012						       clapmt.f(3)
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