MATLAB: Matrix multiplication in 4 D

Question

I have two matrices. The x(r,i,t1,t2) and y(t1) matrix. I want to multiply the matrix y in matrix x for all r, i, and t2. I have the following codes and errors. Could you please help me to realize what is the problem.

     R=8;
    I=12;
    T1=11;
    T2=10;
 x=rand(R,I,T,TT);
 y =[99   129   115   128    96    94    98   107   133    99   120];
 for r=1:R
      for i=1:I
           for t2=1:T2                 
                for t1= 1: T1 
                    xnew(r,i,t1,t2)=y(t1).*x(r,i,t1,t2);     
                       end                  
                end
           end
       end
    Error
Undefined function 'y' for input arguments of type 'double'.
Error in test (line 12)
xnew(r,i,t1,t2)=y(t1).*x(r,i,t1,t2);

Answer 1

If I replace

x=rand(R,I,T,TT);

with

x=rand(R,I,T1,T2);

your code runs to completion for me.