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a guest Nov 17th, 2019 74 Never
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  1. Metoda Fibonacciego:
  2.  
  3. clc; clear all;
  4. xdel(winsid());
  5. x=-2:0.01:1.5;
  6. f1=x.^2-2.*x+1;
  7. fh=scf(1);
  8. plot2d(x,f1);
  9.  
  10. fh1=gce();
  11. fh1.children.foreground=color('scilab red2');
  12. fh1.children.thickness=2;
  13. fh1.children.line_style=7;
  14.  
  15. ah=gca();
  16. ah.grid=[1 1];
  17. ah.grid_style=[9 9];
  18. title('$Wykres funkcji$');
  19. xlabel('$x$');
  20. ylabel('$y$');
  21. ah.x_label.font_size=4.5;
  22. ah.y_label.font_size=4.5;
  23. ah.title.font_size=5;
  24.  
  25. lh=legend('$f_1=x^2-2x+1$');
  26. lh.legend_location="in_upper_right";
  27. lh.font_size=3;
  28.  
  29. function [z]=f(x)
  30.     z=x.^2-2.*x+1;
  31. endfunction
  32.  
  33. a=-2;
  34. b=1.5;
  35. e=0.001;
  36.  
  37. fa=f(a);
  38. fb=f(b);
  39. L=b-a;
  40. Fn=[1 1];
  41. n=2;
  42. while 1
  43.     n=n+1;
  44.     Fn(n)=Fn(n-1)+Fn(n-2);
  45.     if Fn(n)>(1+2*e)*(L/e);
  46.         break;
  47.     end;    
  48. end
  49. Fn(n+1)=Fn(n-1)+Fn(n-2);
  50. k=1;
  51.  
  52. while(k<n)
  53.     r=1-((Fn(n-k+1))/(Fn(n-k+2)));
  54.     fa=f(a);
  55.     fb=f(b);
  56.     if fa>fb then
  57.         a=a+r*(b-a);
  58.         fa=f(a);
  59.     elseif fa<fb then
  60.         b=a+(1-r)*(b-a);
  61.         fb=f(b);
  62.     elseif fa==fb then
  63.         a=a+r*(b-a);
  64.         fa=f(a)
  65.         b=a+(1-r)*(b-a);
  66.         fb=f(b)
  67.     end    
  68.     k=k+1;
  69.     plot2d(a,f(a),style=-5); ea=gce(); ea.children.mark_foreground=5;   // część kodu do zad 2
  70.     plot2d(b,f(b),style=-5); eb=gce(); eb.children.mark_foreground=5;   //
  71.     pause                           //
  72.     delete(ea);                     //
  73.     delete(eb);                     //
  74.     end
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