411 REFERENCE · Wikibooks
Linear Algebra and the C Language/a0a6
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
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/* ------------------------------------ */
/* Save as : c00e.c */
/* ------------------------------------ */
#include "v_a.h"
/* ------------------------------------ */
void fun(int r)
{
double **u = r_mR(i_mR(r,C1),9.);
double **v = r_mR(i_mR(r,C1),9.);
double **projuv = i_mR(r,C1);
clrscrn();
printf(" u :");
p_mR(u,S3,P0,C6);
printf(" v :");
p_mR(v,S3,P0,C6);
proj_mR(u,v,projuv);
printf(" Vector component of u along v \n\n");
printf(" projuv : (<u,v> / ||v||^2) * v ");
p_mR(projuv,S3,P3,C6);
f_mR(u);
f_mR(v);
f_mR(projuv);
}
/* ------------------------------------ */
int main(void)
{
time_t t;
srand(time(&t));
do
{
fun(rp_I(2)+R2);
} while(stop_w());
return 0;
}
/* ------------------------------------ */
/* ------------------------------------ */
Screen output example:
u :
-8
+5
+9
+7
v :
-7
-9
+5
-3
Vector component of u along v
projuv : (<u,v> / ||v||^2) * v
-1.494
-1.921
+1.067
-0.640
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Press X return to stop