In an assignment A(I) = B, the number of elements in B and I must be the same.

    p=3;
    L=1000;
    x=rand(1,L);
    r=zeros(p,1);
    W=ones(p,L);
    V=zeros(L,1);
    for k=1:L 
        r=[x(k);r(1:p-1)];
        V(k) = W.'*r;
    end

error In an assignment A(I) = B, the number of elements in B and I must be the same.

| I want to find the value of V(k) which is the result of transpose W times r but I'm getting the above error. would you please tell me how to fix the code. |

Answer 1

[per isakson]

See

• http://www.mathworks.se/matlabcentral/answers/87710#answer_97292

and start with

1. put the code in a function (functions are easier to debug)
2. set dbstop if error
3. run the function

BTW: V(k) is a scalar

[Rock Rocky]

would you please tell me why I'm getting this error ? BTW when I change W from W=ones(p,L) to W= ones(p,1) the code run well without any error.

[per isakson]

• What result do you expect from the code?
• Did you try the three steps I proposed?
• "run well without any error" . Did you get the expected result?
• I guess it errors because &nbsp V(k) is a scalar&nbsp whereas &nbsp W.'*r &nbsp is a column vector