Unable to perform assignment because the indices on the left side are not compatible with the size of the right side.

Hello,

farfieldvelocity = [-100:.01:100] % velocity est.
lockingdepth = [-100:.01:100] % locking depth est.

for i = 1:length(lockingdepth);
    for j = 1:length(farfieldvelocity);
        v_e_est = (farfieldvelocity(j)./ pi).* atan(dist./lockingdepth(i));
        e = v_est - v_e; 
        CF(j,i) = e'*e;
    end
end

Here I always get the error "Unable to perform assignment because the indices on the left side are not compatible with the size of the right side." for the line CF(j,i) = e'*e

Answer 1

[James Tursa]

What is size(dist) and size(v_e)? If these are row vectors, then maybe you need to do e*e' instead to get a scalar result.

[James Tursa]

From Sevil:

size(dist) is 1 62 and size(v_e) is 62 1

[James Tursa]

Since one is a row vector and one is a column vector, I am guessing this is what you need to change:

e = v_est.' - v_e; % make e a column vector

[James Tursa]

From Sevil:

I am sorry but did not work.

[James Tursa]

Sorry I misread your variables. What is size(v_est)? And what is the variable v_e_est supposed to be used for? Is this what was meant:

e = v_e_est.' - v_e; % make e a column vector

Answer 2

[Sevil Cansu Yildirim]

for i = 1:length(lockingdepth);
    for j = 1:length(farfieldvelocity);
        v_e_est = (farfieldvelocity(j)./ pi).* atan(dist./lockingdepth(i));
        e = v_e_est - v_e;
        CF(j,i) = e.*e';
    end
end

I am sorry.

Here, e is the error whic is the difference between v_e_est (v_e estimated) and (v_e observed).

cf is the cross function, which minimize the error. (e'*e is for that, leat squares method)