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Manual Reference Pages  - decomp (3m_datapac)

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NAME

decomp(3f) - [M_datapac:STATISTICS] decomposes a weighted data matrix (utility routine used by other routines)

CONTENTS

Synopsis
Description
Options
Examples
Author
Maintainer
License

SYNOPSIS

SUBROUTINE DECOMP(N,K,Eta,Tol,Irank,Insing)

DESCRIPTION

decomp(3f) decomposes the weighted data matrix q which originally = the n by k data matrix x times the square root of the weights (in w).

the original q is decomposed into a new q times the inverse of a diagonal matrix d times the diagonal matrix d times an upper triangular matrix r.

the new n by k q has orthogonal columns.

a second output from decomp(3f) is the rank and status (non-singular or singular) of the data matrix x.

a third output from decomp(3f) is the numerically optimal pivot points for the decomposition.

OPTIONS

X	description of parameter
Y	description of parameter

EXAMPLES

Sample program:

   program demo_decomp
   use M_datapac, only : decomp
   implicit none
   ! call decomp(x,y)
   end program demo_decomp

Results:

AUTHOR

The original DATAPAC library was written by James Filliben of the Statistical Engineering Division, National Institute of Standards and Technology.

MAINTAINER

John Urban, 2022.05.31

LICENSE

CC0-1.0

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Nemo Release 3.1

decomp (3m_datapac)

July 20, 2023

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