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Re: [Help-gsl] Question about the matrix format change in gsl_matrix

From: Brian Gough
Subject: Re: [Help-gsl] Question about the matrix format change in gsl_matrix
Date: Wed, 9 Jun 2004 14:11:31 +0100

L Huang writes:
 > I have some trouble to keep the original format of my matrix after
 > using gsl_matrix_fscanf and gsl_matrix_fprintf. Say I read a 3X3
 > matrix from a file by using gsl_matrix_fscanf(fp, m), and write it
 > back to another file with gsl_matrix_fprintf(fp2, m,"%2g"). All the
 > sudden, the original format (3 by 3 matrix) becomes 1 by 9 column
 > vector in new file. Could anyone tell me what's happening here? Is
 > there a function for gsl_vector transposition (row vector to column
 > vector or vice versa). Your help will be highly appreciated.

The output from gsl_matrix_fprintf is always written as a single
stream of numbers -- it is just a dump of the data.

The gsl_matrix_fscanf function will read the data regardless of
formatting, it is insensitive to whitespace in the input.

Brian Gough
(GSL Maintainer)

Network Theory Ltd,
Publishing Free Software Manuals ---

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