
minfo(1)                     Khoros                      minfo(1)

PROGRAM
     minfo - obtain information about a matrix

SYNTAX
     minfo

     -i             input matrix

     [-o]           information text file

     [-V]           Gives the version for minfo

     [-U]           Gives the usage for minfo

     [-P]           Prompts for command line options

     [-A [file1]]   Creates the answer file called minfo.ans or
                    file1

     [-a [file1]]   Uses minfo.ans or file1 as the answer file

DESCRIPTION
     obtain information about a matrix.  The information output
     includes the matrix' dimensions, an estimate of its condi-
     tion, its determinant if it is square, and its norm,
     "Euclidean norm", and 1-norm.

     The condition of the matrix is determined by calculating the
     ratio of the largest and smallest singular values of the
     matrix.

     The norm is defined as the largest singular value of the
     matrix.  The 1-norm and Euclidean norm are obtained by
     selecting the max of the norms of the column vectors.  The
     vector norm for the 1-norm is defined as the sum of the ele-
     ments of the vector.  For the Euclidean norm, the vector
     norm is defined as the square root of the sum of the squares
     of the elements of the vector (i.e. the n-space distance
     from the origin).

REQUIRED ARGUMENTS
     -i     type: infile
            desc: input matrix

OPTIONAL ARGUMENTS
     -o     type: outfile
            desc: information text file

EXAMPLES
SEE ALSO
     intro(1), verror(3), vgparms(3), vutils(3), lminfo(3)

RESTRICTIONS
COPYRIGHT
     Copyright 1992, University of New Mexico.  All rights
     reserved.

Khoros                    Release: 1.0                          1

