，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;
a(32,33)=8.1;a(32,53)=9.2;a(53,30)=7.9;a(53,1)=12.9;a(33,31)=10.3;
  B9 h! ^2 \5 P0 l/ O1 y5 la(31,52)=7.7;a(52,30)=7.2;a(52,29)=8.3;a(30,51)=15.2;a(1,2)=6;
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;
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;
/ F: K% f" W. E2 wa(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;
, B% r& ]) v2 [/ {3 r6 E( _a(26,22)=7.8;a(26,21)=6.5;a(7,48)=11.8;a(7,8)=7.3;a(8,48)=14.5;
' C) a7 X9 _4 j  R/ A" E( k3 x" ?a(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;
# s. |; c. L. l! a; V" [a(42,13)=12.2;a(43,13)=7.8;a(43,12)=6.8;
0 y* l7 [5 _/ s/ I8 h+ Aa(43,14)=8.6;a(46,12)=13.2;a(46,14)=9.8;a(46,45)=15.8;a(46,19)=8.2;
* G- X8 B+ a7 J5 b- M: Z" Ta(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;
- g% u% b$ [, Z. l: z, E* wa(24,25)=8.9;a(24,23)=10;a(23,18)=6.7;
a(18,17)=6.8;a(45,17)=11.8;
' f1 H, M" V& Y& n# d' Ha(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';
# [' H! ?- S6 m9 Q9 Ma(find(a==0))=inf;
! g( O, v( A: }- t) c' \pb(1:length(a))=0;pb(1)=1;index1=1;index2=ones(1,length(a));
8 R8 K: i* t. Z" @d(1:length(a))=inf;d(1)=0;temp=1;
& g0 o( L9 W- b/ v! |) |while sum(pb)<length(a)
     tb=find(pb==0);
d(tb)=min(d(tb),d(temp)+a(temp,tb));
* a' p+ `$ r! @$ w( ~3 j$ }tmpb=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 s6 Y) @7 p" ]6 G  Bindex2(temp)=index1(temp2(1));
  N0 k' E5 w4 b! a3 Z5 @end
1 x5 f' v5 ~2 ad,index1,index2
/ T. l' |+ o$ M) G) r; f??? Index exceeds matrix dimensions.
5 i6 T2 g. c  v% D9 r哪里有问题啊