，程序出错，求最短路径问题·····

X.w.j.拽.

a=zeros(53,53);
5 L! a% J5 i  [/ O. ka(36,35)=8.2;a(36,33)=14.9;a(35,38)=17.6;a(35,37)=11.5;a(38,39)=11;
6 J7 W1 R; d4 M9 pa(38,2)=5.9;a(38,37)=12.2;a(37,34)=7.4;a(37,53)=8.8;a(34,32)=7.3;
1 A9 {5 L* n+ n: R2 d+ Za(32,33)=8.1;a(32,53)=9.2;a(53,30)=7.9;a(53,1)=12.9;a(33,31)=10.3;
a(31,52)=7.7;a(52,30)=7.2;a(52,29)=8.3;a(30,51)=15.2;a(1,2)=6;
1 ]% C% N2 {' J! a3 M+ h0 k4 p6 H2 la(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;
a(6,49)=11.4;a(6,7)=9.7;a(40,8)=15.1;a(51,29)=12.1;a(51,27)=10.5;
a(27,28)=7.8;a(29,28)=7.9;a(28,25)=18.8;a(27,50)=10.5;a(50,25)=13.2;
a(50,24)=7.9;a(50,26)=8.8;a(50,49)=14.2;a(49,7)=9.5;a(49,26)=12;
) [7 Z  u  u' @' Sa(26,22)=7.8;a(26,21)=6.5;a(7,48)=11.8;a(7,8)=7.3;a(8,48)=14.5;
& i) j5 D# b  ja(8,41)=7.2;a(41,9)=8;
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;
+ Q6 w! E4 P  v- L+ L6 ^6 x! Za(42,13)=12.2;a(43,13)=7.8;a(43,12)=6.8;
  j, p+ d) D8 o% o: ya(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;
- v9 o0 r$ i9 [+ i' n6 \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;
a(24,25)=8.9;a(24,23)=10;a(23,18)=6.7;
) D, l$ k$ }/ w7 @a(18,17)=6.8;a(45,17)=11.8;
& X! e: W+ x( k% l' g& Ya(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;
; w3 S! E0 i% V+ upb(1:length(a))=0;pb(1)=1;index1=1;index2=ones(1,length(a));
0 _3 l. h2 y/ ~7 td(1:length(a))=inf;d(1)=0;temp=1;
while sum(pb)<length(a)
     tb=find(pb==0);
d(tb)=min(d(tb),d(temp)+a(temp,tb));
$ q# ], J5 Z; o, ]5 n' j; Gtmpb=find(d(tb)==min(d(tb)));
temp=tb(tmpb(1));
pb(temp)=1;
index1=[index1,temp];
temp2=find(d(index1)==d(temp)-a(temp,index1));
2 F- R# e) k) Cindex2(temp)=index1(temp2(1));
end
6 t, |) j8 o: P% ^+ q4 Dd,index1,index2
- U! x; M$ m8 f. S5 e+ S( }??? Index exceeds matrix dimensions.
9 L( b4 F6 e4 x5 |# X8 O0 w. Y$ M哪里有问题啊