411 REFERENCE · Wikibooks
Linear Algebra and the C Language/a0dk
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
__NOTOC__
Install and compile this file in your working directory.
/* ------------------------------------ */
/* Save as: c00b.c */
/* ------------------------------------ */
#include "v_a.h"
/* ------------------------------------ */
#define RCA C3
/* ------------------------------------ */
int main(void)
{
double a[RCA*RCA]={
+9,+9,+8,
+9,+6,+2,
+8,+2,+3
};
double **A = ca_A_mR(a, i_mR(RCA,RCA));
double **EValue = eigs_mR(A, i_mR(RCA,C1));
clrscrn();
printf(" Copy/Paste into the octave windows \n\n");
p_Octave_mR(A,"a",P0);
printf(" EValue = eigs (a,%d) \n\n",RCA);
printf(" EValue:");
p_mR(EValue,S13,P6,C1);
stop();
f_mR(A);
f_mR(EValue);
return 0;
}
/* ------------------------------------ */
/* ------------------------------------ */
Screen output example:
Copy/Paste into the octave windows
a=[
+9,+9,+8;
+9,+6,+2;
+8,+2,+3]
EValue = eigs (a,3)
EValue:
+19.969678
-4.396009
+2.426331
Press return to continue.