09-08-2009
diagonal matrix to square matrix
Hello, all!
I am struggling with a short script to read a diagonal matrix for later retrieval.
1.000 0.234 0.435 0.123 0.012 0.102 0.325 0.412 0.087 0.098
1.000 0.111 0.412 0.115 0.058 0.091 0.190 0.045 0.058
1.000 0.205 0.542 0.335 0.054 0.117 0.203 0.125
1.000 0.587 0.159 0.357 0.258 0.654 0.341
1.000 0.269 0.369 0.687 0.145 0.125
1.000 0.222 0.451 0.134 0.333
1.000 0.112 0.217 0.095
1.000 0.508 0.701
1.000 0.663
1.000
Actually this matrix is the correlation co-efficiency of the gene expression by microarray, so that half matrix contains the same information of the square matrix.
First, the matrix should be aligned with all the 1.000 at the diagonal, i.e.
1.000 0.234 0.435 0.123 0.012 0.102 0.325 0.412 0.087 0.098
1.000 0.111 0.412 0.115 0.058 0.091 0.190 0.045 0.050
1.000 0.205 0.542 0.335 0.054 0.117 0.203 0.125
1.000 0.587 0.159 0.357 0.258 0.654 0.341
1.000 0.269 0.369 0.687 0.145 0.125
1.000 0.222 0.451 0.134 0.333
1.000 0.112 0.217 0.095
1.000 0.508 0.701
1.000 0.663
1.000
as each gene has 1.000 correlation coefficiency with itself.
Then, I want to get a square matrix to fill the missing half by Matrix[i][j]=Matrix[j][i] e.g. Matrix[2][1]= matrix[1][2] etc. I only posted 10 out of 25,000 genes. The real file is a 25,000x25,000 square matrix.
With the sqaure matrix I can easily access any row or column for the co-efficiencies of each individual gene with the others of the genome.
Thanks a lot!
Yifang
Last edited by yifangt; 09-08-2009 at 10:34 PM..
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LEARN ABOUT CENTOS
slaset
slaset.f(3) LAPACK slaset.f(3)
NAME
slaset.f -
SYNOPSIS
Functions/Subroutines
subroutine slaset (UPLO, M, N, ALPHA, BETA, A, LDA)
SLASET initializes the off-diagonal elements and the diagonal elements of a matrix to given values.
Function/Subroutine Documentation
subroutine slaset (characterUPLO, integerM, integerN, realALPHA, realBETA, real, dimension( lda, * )A, integerLDA)
SLASET initializes the off-diagonal elements and the diagonal elements of a matrix to given values.
Purpose:
SLASET initializes an m-by-n matrix A to BETA on the diagonal and
ALPHA on the offdiagonals.
Parameters:
UPLO
UPLO is CHARACTER*1
Specifies the part of the matrix A to be set.
= 'U': Upper triangular part is set; the strictly lower
triangular part of A is not changed.
= 'L': Lower triangular part is set; the strictly upper
triangular part of A is not changed.
Otherwise: All of the matrix A is set.
M
M is INTEGER
The number of rows of the matrix A. M >= 0.
N
N is INTEGER
The number of columns of the matrix A. N >= 0.
ALPHA
ALPHA is REAL
The constant to which the offdiagonal elements are to be set.
BETA
BETA is REAL
The constant to which the diagonal elements are to be set.
A
A is REAL array, dimension (LDA,N)
On exit, the leading m-by-n submatrix of A is set as follows:
if UPLO = 'U', A(i,j) = ALPHA, 1<=i<=j-1, 1<=j<=n,
if UPLO = 'L', A(i,j) = ALPHA, j+1<=i<=m, 1<=j<=n,
otherwise, A(i,j) = ALPHA, 1<=i<=m, 1<=j<=n, i.ne.j,
and, for all UPLO, A(i,i) = BETA, 1<=i<=min(m,n).
LDA
LDA is INTEGER
The leading dimension of the array A. LDA >= max(1,M).
Author:
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
September 2012
Definition at line 111 of file slaset.f.
Author
Generated automatically by Doxygen for LAPACK from the source code.
Version 3.4.2 Tue Sep 25 2012 slaset.f(3)