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nono2009(½ð±Ò+3,VIP+0):ллר¼Ò£¡ 10-30 22:13
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Originally posted by bib96356 at 2009-10-30 16:39:
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>> [x y]=meshgrid(-10:.1:10);
>> z=x.^2+y.^2;
>> C = contourc([-10:.1:10],[-10:.1:10],z, [10 10]);%¼ÆËã¸ß¶ÈΪ10µÄµÈ¸ßÏß×ø±ê
>> xx=C(1,2:end);%µÈ¸ßÏߵĺá×ø±ê
>> yy=C(2,2:end);%×Ý×ø±ê
>> fill(xx,yy,'b');%µÈ¸ßÏß°üΧµÄÇøÓò
>> polyarea(xx,yy)%ÇøÓòµÄÃæ»ý£¬Ó¦¸ÃÊÇ10pi
ans =

   31.4051

>> %ÆäËûÇé¿ö¿ÉÒÔ×ÃÇéÁé»î´¦Àí

[ Last edited by hitzhang on 2009-10-30 at 22:11 ]
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ÒýÓûØÌû:
Originally posted by hitzhang at 2009-10-30 22:09:

>> [x y]=meshgrid(-10:.1:10);
>> z=x.^2+y.^2;
>> C = contourc([-10:.1:10],[-10:.1:10],z, [10 10]);%¼ÆËã¸ß¶ÈΪ10µÄµÈ¸ßÏß×ø±ê
>> xx=C(1,2:end);%µÈ¸ßÏߵĺá×ø±ê
>> y ...

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Originally posted by bib96356 at 2009-11-1 11:11:

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