Linear Algebra and the C Language/a0i3

__NOTOC__ Install and compile this file in your working directory. /* ------------------------------------ */ /* Save as : c00d.c */ /* ------------------------------------ */ #include "v_a.h" /* ------------------------------------ */ void fun(int r) { double **A = rskewsymmetric_mR( i_mR(r,r),999.); clrscrn(); printf(" The nonzero eigenvalues of a skew-symmetric" " matrix are non-real.\n\n"); printf(" Copy/Paste into the octave windows \n\n"); p_Octave_mR(A,"a",P0); printf(" [V, E] = eigs (a,%d) \n\n",r); f_mR(A); } /* ------------------------------------ */ int main(void) { time_t t; srand(time(&t)); do { fun(rp_I(R4)+R2); } while(stop_w()); return 0; } /* ------------------------------------ */ /* ------------------------------------ */ The eigenvalues ​​of an anti-symmetric matrix are imaginary Screen output example: The nonzero eigenvalues of a skew-symmetric matrix are non-real. Copy/Paste into the octave windows a=[ +0,+662,+544,-833,-634; -662,+0,+604,-792,-805; -544,-604,+0,+445,+659; +833,+792,-445,+0,+558; +634,+805,-659,-558,+0] [V, E] = eigs (a,5) Press return to continue Press X return to stop