MATLAB: Index exceeds array bounds error

helpindex exceed array bound

Dear all,
I wrote this simple code:
%input data
SP=[exp(-(0.01*0.5)/(1-0)); exp(-(0.01*1)/(1-0))]; 
m=3; 
k=2;
b=0.01;
dt=0.5;
w=[100 200 300; 100 300 400];
a0=[0 0];                     % guess per fsolve
fun=@(a) (get_survivalprobability(a,b,w,dt,m,k)-SP); 
[a] = fsolve(fun,a0);        % find f(a)=0 ; 
for i=1:k                    % find hazard rates with the new parameters a
   for j=1:m
     h(i,j)=exp(a(i)+b*w(i,j))
    end
end
whose main function that I implemented is:
function [SP_Simulation]=get_survivalprobability(a,b,w,dt,m,k)
 for i=1:k
 for j=1:m            
   hzrd(i,j)=exp(a(i)+b*w(i,j)) ;
  end
end
h1=hzrd(1,:) ;
SP1=(sum(exp(h1*-dt)))/m ;         % find a for the first row vector
for i=1:k-1
 h=(hzrd(i,:)+hzrd(i+1,:))*-dt;    
 SP_others=sum(exp(h),2)/m ;
 SP_Simulation=[SP1;SP_others];
end
end
For the previous example, where " w " is a matrix 2×3 , everything works. However, when I want to implement this function for a different input matrix data " w " of dimension 253×100 , the following error displays:
" Index exceeds array bounds. Error in get_survivalprobability (line 6)
hzrd(i,j)=exp(a(i)+b*w(i,j)) ; "
Does anyone know how can I fix it, please?
Thank you in advance.
Regards,
Martina

Best Answer

Yes no error with 
w=rand(253,100);
Check:
>> whos w
  Name        Size              Bytes  Class     Attributes
  w         253x100            202400  double
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