，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;
! u0 p- C: `' |4 O, M/ ra(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;
. n+ t+ \+ l* g1 q1 o& g: _$ B% m" Wa(6,49)=11.4;a(6,7)=9.7;a(40,8)=15.1;a(51,29)=12.1;a(51,27)=10.5;
, O8 M/ ~6 G% ~. ]  q8 e; Ma(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 p0 x. E. ^& Ha(50,24)=7.9;a(50,26)=8.8;a(50,49)=14.2;a(49,7)=9.5;a(49,26)=12;
3 \5 ]2 d/ u, z  ]3 e# k1 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;
+ c# G3 @- W) g* W8 wa(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;
a(42,13)=12.2;a(43,13)=7.8;a(43,12)=6.8;
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;
3 i6 d/ Z) x9 E, \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;
" v) I1 Q* T, va(24,25)=8.9;a(24,23)=10;a(23,18)=6.7;
2 M8 ]" k; j7 S2 T/ _7 ?a(18,17)=6.8;a(45,17)=11.8;
. M4 @& Q! U# Y, j. e! Ia(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';
1 J4 H. [, `3 y- d0 D: q, D* ja(find(a==0))=inf;
7 k$ `) Y5 T# ?" w( ppb(1:length(a))=0;pb(1)=1;index1=1;index2=ones(1,length(a));
7 t" P5 T* x7 nd(1:length(a))=inf;d(1)=0;temp=1;
while sum(pb)<length(a)
) z& @7 e3 c2 V* Z9 b     tb=find(pb==0);
d(tb)=min(d(tb),d(temp)+a(temp,tb));
tmpb=find(d(tb)==min(d(tb)));
3 p( M. C( l/ B1 C: \( ftemp=tb(tmpb(1));
# p1 b, |8 [* d( ^4 d7 }pb(temp)=1;
index1=[index1,temp];
temp2=find(d(index1)==d(temp)-a(temp,index1));
# L6 g- Q, K2 b/ zindex2(temp)=index1(temp2(1));
3 L0 _. R$ ]% C* m$ _5 b( M$ yend
d,index1,index2
+ C: P+ ?; y4 B4 M1 E??? Index exceeds matrix dimensions.
4 E  t4 K& n9 B/ r哪里有问题啊