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luomia

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zhaoyanqiao: ½ð±Ò+10, ²©Ñ§EPI+1, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸, ·Ç³£¸Ðл£¬ÎÒÔõô¾ÍûÏëµ½µü´úÄØ 2012-07-07 13:43:11
ÒýÓûØÌû:
7Â¥: Originally posted by zhaoyanqiao at 2012-07-07 09:40:24
v=0:0.1:10;
y1=sin(v/2);
y2=3*v/14/pi;
plot(v,y1)
hold on
plot(v,y2)
grid on

¿ÉÒÔ¿´µ½£¬ÔÚv5.5×óÓÒʱÓÐÒ»¸ö½»µã£¬Ò²¾ÍÊÇÎÒËùÐèÒªµÄÖµ...

µü´ú·¨³ÌÐòÈçÏ£º
function v=diedai(tol,a,n)
v=a;
f=0;
for i=1:n
    f=14*pi*sin(v/2)/3;
    if abs(f-v)<=tol
        break;
    else
        v=f;
    end
end
end
²»¹ýµü´ú´ÎÊýºÜ¾ªÈË
diedai(0.0001,5,20000)

ans =

   -0.3535

>> diedai(0.0001,5,200000)

ans =

  -13.6383

>> diedai(0.0001,5,2000000)

ans =

   -5.5123

¿ÉÒÔ¿´µ½Ò»¹²Ó¦ÓÐ3¸ö½â£¬0£¬+/-5.5123
Ò»´Î´ÎƼˮÏà·ê
9Â¥2012-07-07 11:32:35
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