GRASS GIS 7 Programmer's Manual
7.8.4(2020)-exported
eigen.c
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/* eigen.c CCMATH mathematics library source code.
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*
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* Copyright (C) 2000 Daniel A. Atkinson All rights reserved.
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* This code may be redistributed under the terms of the GNU library
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* public license (LGPL). ( See the lgpl.license file for details.)
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* ------------------------------------------------------------------------
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*/
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#include <stdlib.h>
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#include "
ccmath.h
"
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void
eigen
(
double
*a,
double
*ev,
int
n)
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{
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double
*dp;
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dp = (
double
*)calloc(n,
sizeof
(
double
));
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housev
(a, ev, dp, n);
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qrevec
(ev, a, dp, n);
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trnm
(a, n);
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free(dp);
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}
ccmath.h
trnm
void trnm(double *a, int n)
Definition:
trnm.c:8
qrevec
int qrevec(double *eval, double *evec, double *dp, int n)
Definition:
qrevec.c:9
housev
void housev(double *a, double *d, double *ud, int n)
Definition:
housev.c:10
eigen
void eigen(double *a, double *ev, int n)
Definition:
eigen.c:10
external
ccmath
eigen.c
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