Mathc complexes/07i
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c00d.c |
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/* ------------------------------------ */
/* Save as : c00d.c */
/* ------------------------------------ */
#include "w_a.h"
/* ------------------------------------ */
/* ------------------------------------ */
#define RA R4
#define CA C4
#define Cb C1
#define CXY C2
/* ------------------------------------ */
int main(void)
{
double ta[RA*CA]={
/* x**3 x**2 x**1 x**0 */
-125, +25, -5, +1,
-8, +4, -2, +1,
+8, +4, +2, +1,
+125, +25, +5, +1,
};
double tb[RA*C1]={
/* y */
-8,
+8,
-8,
+8,
};
double xy[RA*CXY] ={ -5, -8,
-2, 8,
2, -8,
5, 8 };
double **XY = ca_A_mRZ(xy,i_mZ(RA,CXY));
double **A = ca_A_mRZ(ta,i_mZ(RA,CA));
double **b = ca_A_mRZ(tb,i_mZ(RA,C1));
double **Inv = i_mZ(CA,RA);
double **Invb = i_mZ(CA,C1);
clrscrn();
printf(" Fitting a linear Curve to Data :\n\n");
printf(" x y \n");
p_mRZ(XY,S5,P0,C6);
printf(" A :\n x**3 x**2 x**1 x**0");
p_mRZ(A,S7,P2,C7);
printf(" b :\n y ");
p_mRZ(b,S7,P2,C7);
stop();
clrscrn();
printf(" Inv : ");
invgj_mZ(A,Inv);
pE_mRZ(Inv,S12,P4,C10);
printf(" x = Inv * b ");
mul_mZ(Inv,b,Invb);
p_mRZ(Invb,S10,P2,C10);
printf("\n The coefficients a, b, c of the curve are : \n\n"
" y = %+.2fx**3 %+.2fx \n\n"
,Invb[R1][C1],Invb[R3][C1]);
stop();
f_mZ(XY);
f_mZ(b);
f_mZ(A);
f_mZ(Inv);
f_mZ(Invb);
return 0;
}
/* ------------------------------------ */
/* ------------------------------------ */
Exemple de sortie écran :
Fitting a linear Curve to Data :
x y
-5 -8
-2 +8
+2 -8
+5 +8
A :
x**3 x**2 x**1 x**0
-125.00 +25.00 -5.00 +1.00
-8.00 +4.00 -2.00 +1.00
+8.00 +4.00 +2.00 +1.00
+125.00 +25.00 +5.00 +1.00
b :
y
-8.00
+8.00
-8.00
+8.00
Press return to continue.
Inv :
-4.7619e-03 +1.1905e-02 -1.1905e-02 +4.7619e-03
+2.3810e-02 -2.3810e-02 -2.3810e-02 +2.3810e-02
+1.9048e-02 -2.9762e-01 +2.9762e-01 -1.9048e-02
-9.5238e-02 +5.9524e-01 +5.9524e-01 -9.5238e-02
x = Inv * b
+0.27
+0.00
-5.07
+0.00
The coefficients a, b, c of the curve are :
y = +0.27x**3 -5.07x
Press return to continue.