function?bisec_g（f_nameacxminxmaxn_points）
%	ac:end?points?of??initial??interval
%	tolerance	:?tolerance
%	it_limit:limit?of?iteration?number
%	Y_a?Y_c?:?y?values?of?the?current?end?points?
clfhold?off
clear?Y_aclear?Y_c
wid_x=xmax-xmin;
dx=（xmax-xmin）/n_points;
xp=xmin:dx:xmax;
yp=feval（f_namexp）;
plot（xpyp‘r‘）;????????????????????????%?y=?f（x）
xlabel（‘x‘）;ylabel（‘f（x）‘）;?title（‘Bisection?Method‘）hold?on
ymin=min（yp）;ymax=max（yp）;wid_y=ymax-ymin;
yp=0.0*xp;
plot（xpyp）?????????????????????????????%?x?axes?
fprintf（‘Bisection?Scheme?\n\n‘）;
fprintf（‘It	?a	?b	?c		fa=?f（a）‘）;
fprintf（‘	fc=?f（c）?abs（fc-fa）	abs（c-a）/2\n‘）;
tolerance=0.000001;
it_limit?=?30;
it=0;
Y_a=feval（f_namea）;
Y_c=feval（f_namec）;
plot（[aa][Y_a0]‘black‘）;text（a-0.1*wid_y‘x=a‘）???%line
plot（[cc][Y_c0]‘black‘）;text（c-0.3*wid_y‘x=c‘）???%line
if（Y_a*Y_c>0）
????fprintf（‘f（a）f（c）>0\n‘）;
else
????while?1
????????it=it+1;
????????b=（a+c）/2;
????????Y_b=feval（f_nameb）;
????????plot（[bb][Y_b0]‘:‘）;???%line
????????plot（b0‘o‘）???????????????%o?point
?if?it<4
?????text（bwid_y/20[num2str（it）]）
?end
????fprintf（‘%3.0f?%10.6f?%10.6‘itab）;
????fprintf（‘%10.6f?%10.6f?%10.6‘cY_aY_c）;
????fprintf（‘%12.3e?%12.3e\n‘abs（Y_c-Y_a）abs（c-a）/2）;
????if（abs（c-a）/2<=tolerance）
????????fprintf（‘Tolerance?is?satisfied.\n‘）;
????????break
????end
???if（it>it_limit）
???????fprintf（‘Iteration?limit?exceeded.\n‘）;
???????break
???end
???if??（Y_a*Y_b<=0）
???????c=b;Y_c=Y_b;
???else
???????a=b;Y_a=Y_b;
???end
????end
fprintf（‘Final?result;Root=%12.6f\n‘b）
end
x=b;
plot（[xx][0.05*wid_y0.2*wid_y]‘g‘）;text（x0.25*wid_y‘Final?solutin‘）
plot（[x（x-wid_x*0.004）][0.05*wid_y0.09*wid_y]‘r‘）????%?arrow?line
plot（[x（x+wid_x*0.004）][0.05*wid_y0.09*wid_y]‘r‘）???%?arrow?line
????????????
????????
????????

?屬性????????????大小?????日期????時間???名稱
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?????文件???????1872??2017-12-06?10:36??對分法求根\bisec_g.m

?????文件?????????41??2017-12-06?10:01??對分法求根\ex_5x2.m

?????文件?????????29??2017-12-06?09:59??對分法求根\main.m

?????目錄??????????0??2017-12-06?10:37??對分法求根

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?????????????????1942????????????????????4