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[ÇóÖú] ÔÚmatlabÉÏÔËÐУ¬´óÉñ°ïæµ÷ÊÔÏ£¬ÊǸã·ÖÐÎÄ£ÄâµÄDLA

function DLAmodel     %Fractal growth modeling by DLA
L = 151 ;
axis ( [ 0 L 0 L ])
set (gcf ,¡®color¡¯ ,¡®w¡¯ ) ¡¡¡¡%½«Í¼Ðα³¾°ÉèÖÃΪ°×É«
Xhalf = floor (L/ 2) + 1 ;
Yhalf = Xhalf ;
hold on
X = sparse (L , L) ;
X(xhalf , yhalf ) = 1 ; %É趨 ¡°ÖÖ×Ó¡± λÖÃ
[ i , j ] = find (X) ;
plothdl = plot (i , j ,¡®b¡¯ ) ;
axis off
axis square
p = - 1 : 1 ;
Times = 15000 ; %Éè¶¨Ëæ»ú²úÉúÁ£×ӵĸöÊý
for count = 1 ¡ÃTimes
¡¡¡¡sita = rand*2*pi ; ¡¡¡¡%Éú³ÉÒ»¸öËæ»úµã
R = floor (L/2) ;
kx = floor (Xhalf + R*cos( sita) ) ;
ky = floor ( Yhalf + R*sin( sita) ) ;
plot2 = plot (kx , ky ,¡®r¡¯ ) ;
set (plot2 ,¡®marker¡¯ ,¡®d¡¯,¡®markersize¡¯, 8)
drawnow ¡¡¡¡%¶¯Ì¬ÑÝÊ¾Ëæ»ú²úÉúÁ£×ÓµÄÔ˶¯Ä£Ê½
flag = 0 ;
[ i , j ] = find (X) ;
lr = lengt h (i) ;
while kx < L - 1 &ky < L - 1 &kx > 1 &ky > 1 &flag = = 0 ,
¡¡¡¡N = sum( sum(X(kx + p , ky + p) ) ) ; %ͳ¼ÆÓëËæ»úÁ£×ÓÏàÁÚµÄ ¡°ÖÖ×ÓÍÅ´Ø¡± Á£×ӵĸöÊý
¡¡¡¡¡¡ if N > 0
¡¡¡¡¡¡¡¡¡¡X(kx , ky) = 1 ;
¡¡¡¡¡¡¡¡ flag = 1 ;
¡¡¡¡¡¡else
¡¡¡¡ran = rand ; ¡¡¡¡%²¼ÀÊÔ˶¯¿ØÖÆ
¡¡¡¡ if ran > 2/3
¡¡¡¡¡¡¡¡kx = kx + 1 ;
¡¡¡¡elseif ran < 1/3
¡¡¡¡¡¡¡¡kx = kx - 1 ;
¡¡¡¡¡¡end
¡¡¡¡¡¡¡¡ran = rand ;
¡¡¡¡¡¡¡¡ if ran > 2/ 3
¡¡¡¡¡¡¡¡¡¡ky = ky + 1 ;
¡¡¡¡¡¡¡¡el seif ran < 1/ 3
¡¡¡¡¡¡¡¡¡¡ky = ky - 1 ;
¡¡¡¡¡¡¡¡end
¡¡¡¡¡¡set (plot2 ,¡®xdata¡¯ , kx ,¡®ydata¡¯, ky) ;
¡¡¡¡¡¡end
¡¡¡¡end
cla ;
[ i , j ] = find (X) ;
plot (i , j ,¡®b.¡¯ )
drawnow
end
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csgt0: ½ð±Ò+1, лл 2013-05-31 11:26:53
Ʀ×Óppt: ½ð±Ò+10, ¡ïÓаïÖú 2013-06-04 08:43:23
´óÌåÎÊÌâûÓÐ,ÓÐЩ±êµã¿ÉÄÜÊÇÄã·¢ÌûµÄʱºòµÃÎÊÌâ,Ïñ''µÈ,ÆäÖÐ"X(xhalf , yhalf ) = 1 ; %É趨 ¡°ÖÖ×Ó¡± λÖÃ"ÖÐxhalf , yhalf ÖеÄx,y¶¼Òª´óд£¬ÓÐһЩ±äÁ¿¿ÉÄÜûÓõ½£¬Ïñlr£¬ÁíÍ⣬whileÖеÄ&ÊDz»ÊǸÄΪ&&¸üºÃһЩ
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3Â¥2013-05-28 13:43:44
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Ʀ×Óppt

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ÒýÓûØÌû:
3Â¥: Originally posted by zhangzhiguang at 2013-05-28 13:43:44
´óÌåÎÊÌâûÓÐ,ÓÐЩ±êµã¿ÉÄÜÊÇÄã·¢ÌûµÄʱºòµÃÎÊÌâ,Ïñ''µÈ,ÆäÖÐ"X(xhalf , yhalf ) = 1 ; %É趨 ¡°ÖÖ×Ó¡± λÖÃ"ÖÐxhalf , yhalf ÖеÄx,y¶¼Òª´óд£¬ÓÐһЩ±äÁ¿¿ÉÄÜûÓõ½£¬Ïñlr£¬ÁíÍ⣬whileÖеÄ&ÊDz»ÊÇ ...

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4Â¥2013-06-04 08:44:17
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

bihaio

гæ (³õÈëÎÄ̳)

ÒýÓûØÌû:
3Â¥: Originally posted by zhangzhiguang at 2013-05-28 13:43:44
´óÌåÎÊÌâûÓÐ,ÓÐЩ±êµã¿ÉÄÜÊÇÄã·¢ÌûµÄʱºòµÃÎÊÌâ,Ïñ''µÈ,ÆäÖÐ"X(xhalf , yhalf ) = 1 ; %É趨 ¡°ÖÖ×Ó¡± λÖÃ"ÖÐxhalf , yhalf ÖеÄx,y¶¼Òª´óд£¬ÓÐһЩ±äÁ¿¿ÉÄÜûÓõ½£¬Ïñlr£¬ÁíÍ⣬whileÖеÄ&ÊDz»ÊÇ ...

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5Â¥2013-06-26 20:37:06
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

zhangzhiguang

ÖÁ×ðľ³æ (ÎÄ̳¾«Ó¢)

ÒýÓûØÌû:
5Â¥: Originally posted by bihaio at 2013-06-26 20:37:06
2Â¥Ö÷ÇëÎÊÄãÄÜÊÇÄ£Äâ³öÀ´Â±¨´í°¡Ëü£¬»¹ÓоÍÊÇdrawnowÕâÀïËüºÃÏñûÓÃÉϰ¡£¿ÇóÖú¡£¡£Ð»Ð»°¡...

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