，程序出错，求最短路径问题·····

X.w.j.拽.

a=zeros(53,53);
a(36,35)=8.2;a(36,33)=14.9;a(35,38)=17.6;a(35,37)=11.5;a(38,39)=11;
a(38,2)=5.9;a(38,37)=12.2;a(37,34)=7.4;a(37,53)=8.8;a(34,32)=7.3;
  n! q- k/ f& D4 S, Ka(32,33)=8.1;a(32,53)=9.2;a(53,30)=7.9;a(53,1)=12.9;a(33,31)=10.3;
7 \. ?, o1 D. e. Aa(31,52)=7.7;a(52,30)=7.2;a(52,29)=8.3;a(30,51)=15.2;a(1,2)=6;
1 Q+ N8 K, o+ h, @2 s+ X. \a(1,39)=11.5;a(1,51)=10.1;a(1,49)=19.8;a(1,3)=9.2;a(39,4)=7.9;a(4,3)=4.8;
a(4,40)=8.2;a(40,5)=12.7;a(40,6)=11.3;a(3,6)=8.3;
0 h4 o. x# U/ Y  }: u- Va(6,49)=11.4;a(6,7)=9.7;a(40,8)=15.1;a(51,29)=12.1;a(51,27)=10.5;
  y2 ?2 L! M$ h7 s  aa(27,28)=7.8;a(29,28)=7.9;a(28,25)=18.8;a(27,50)=10.5;a(50,25)=13.2;
5 }& n) i  v- x0 }  y8 H5 Ya(50,24)=7.9;a(50,26)=8.8;a(50,49)=14.2;a(49,7)=9.5;a(49,26)=12;
! q2 A5 I' a6 z+ o& w4 pa(26,22)=7.8;a(26,21)=6.5;a(7,48)=11.8;a(7,8)=7.3;a(8,48)=14.5;
5 w1 @8 A8 u* ma(8,41)=7.2;a(41,9)=8;
2 a3 r! F, ?. U' Y) v/ ]5 Q& }. d4 @a(9,5)=20.4;a(41,12)=14.2;a(41,10)=7.8;a(10,42)=5.6;a(42,11)=10.8;
0 x: |/ Q8 S0 j+ S: g6 O& ia(42,13)=12.2;a(43,13)=7.8;a(43,12)=6.8;
. |5 f0 j0 }) b' X4 b5 I9 ^; {a(43,14)=8.6;a(46,12)=13.2;a(46,14)=9.8;a(46,45)=15.8;a(46,19)=8.2;
a(46,20)=8.1;a(48,20)=7.2;a(48,21)=5.5;a(21,22)=7.9;a(21,20)=9.3;
a(47,22)=4.1;a(47,23)=10.1;a(47,18)=9.8;a(47,19)=9.2;a(22,24)=9.1;
7 @8 l2 y. C; d% P0 v, ia(24,25)=8.9;a(24,23)=10;a(23,18)=6.7;
3 H* E  y* Z" Z3 c& q; Ja(18,17)=6.8;a(45,17)=11.8;
& e/ Z* e6 D- J9 L' C' }% oa(45,19)=8.2;a(45,16)=8.8;a(16,15)=15;a(44,15)=9.9;a(44,13)=10.2;a(15,14)=8.6;a(39,2)=11.2;a(34,33)=19;a(34,36)=20.3;
a=a+a';
a(find(a==0))=inf;
pb(1:length(a))=0;pb(1)=1;index1=1;index2=ones(1,length(a));
$ t, L: n8 K2 t. O% N# vd(1:length(a))=inf;d(1)=0;temp=1;
while sum(pb)<length(a)
4 W8 j; ?: t) Y9 N: F! w     tb=find(pb==0);
d(tb)=min(d(tb),d(temp)+a(temp,tb));
tmpb=find(d(tb)==min(d(tb)));
1 V6 p( u/ U% z' [temp=tb(tmpb(1));
! m' W5 ^/ w+ k7 g% Fpb(temp)=1;
index1=[index1,temp];
/ a8 e9 W% N4 T1 ]4 V3 Ktemp2=find(d(index1)==d(temp)-a(temp,index1));
8 v& p7 h9 m) U, _index2(temp)=index1(temp2(1));
end
d,index1,index2
??? Index exceeds matrix dimensions.
哪里有问题啊