Unable to perform assignment because the left and right sides have a different number of elements.

Hi, I'm trying to do a for loop as following.

It can loop up to 633 times but can't do more and I got the error message as in the title.

I appreciate if you could teach me how to solve this.

load variables

for j = 1:length(r)    
    [content(j)] = vlookup(AC, r(j), 2, 1);
end

Answer 1

[Turlough Hughes]

Your vlookup is not returning a value when j = 634. You will need a condition to deal with this when it happens.

For example:

load variables

k = 1;                    % loop variable
content = zeros(size(r)); % preallocate

for j = 1:length(r) 
    
    v = vlookup(AC, r(j), 2, 1);
    
    if ~isempty(v)
        content(k) = v;
        k = k+1;        % increment k
    end
end

% remove excess rows that arose due to empty output from vlookup
idel = find(content~=0,1,'last'); 
content(idel+1:end) = [];

[Yu]

Thank you so much for giving me a great example!

Since I'm still a beginner, I had no idea where to fix and was lost.

I checked every function you wrote and now understand them clearly!

I really appreciate your help!

[Turlough Hughes]

Happy to help and welcome to MATLAB Answers! Please accept the best answer when you're happy the question has been fully addressed.

[Yu]

Got it! Thanks!