Mathc initiation/Fichiers h : 813
Apparence
Installer et compiler ces fichiers dans votre répertoire de travail.
c00b.c |
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/* --------------------------------- */
/* save as c00b.c */
/* --------------------------------- */
#include "x_hfile.h"
#include "fb.h"
/* --------------------------------- */
int main(void)
{
CTRL_splot p;
p.xmin = -3, p.xmax = 3;
p.ymin = -2, p.ymax = 2;
p.zmin = -1, p.zmax = 5;
p.rot_x = 90, p.rot_z = 36;
p.scale = 1, p.scale_z = 1;
pt2d Q = i_pt2d(1./2.,-1./4.);
clrscrn();
printf(" Let f be a function of two variables. \n\n");
printf(" A pair (a,b) is a critical point of f if either\n\n");
printf(" (I) f_x(a,b) = 0 and f_y(a,b) = 0 \n\n");
printf(" (II) f_x(a,b) or f_y(a,b) does not exit.\n\n\n\n");
printf(" Verify is p(%0.2f,%0.2f) is a critical point of f.\n\n\n",Q.x,Q.y);
printf(" f : x,y-> %s\n\n\n", feq );
printf(" f_x(%0.2f,%0.2f) = %0.9f \n\n",Q.x,Q.y, fxy_x(f,H,Q));
printf(" f_y(%0.2f,%0.2f) = %0.9f \n\n\n",Q.x,Q.y, fxy_y(f,H,Q));
stop();
clrscrn();
printf(" f : (x,y)-> %s\n\n\n", feq);
G_3d_p( p,
feq,f,
Q);
printf(" ... load \"a_main.plt\" ... with gnuplot. \n\n");
stop();
return 0;
}
/* --------------------------------- */
/* --------------------------------- */
Exemple de sortie écran :
Let f be a function of two variables.
A pair (a,b) is a critical point of f if either
(I) f_x(a,b) = 0 and f_y(a,b) = 0
(II) f_x(a,b) or f_y(a,b) does not exit.
Verify is p(0.50,-0.25) is a critical point of f.
f : x,y-> x**2 + 4*y**2 - x + 2*y
f_x(0.50,-0.25) = -0.000000000
f_y(0.50,-0.25) = 0.000000000
Press return to continue.
Exemple de sortie écran :
f : (x,y)-> x**2 + 4*y**2 - x + 2*y
Open the file ... load "a_main.plt" ... with gnuplot.
Press return to continue.