Why are the "For loops" not looping?

Question

Christopher Scott 2022-2-21

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1655365-why-are-the-for-loops-not-looping

评论： per isakson 2022-2-22

prompt = 'Enter Integer Value For N ';
N = input(prompt);
prompt = 'Enter Integer Value For E ';
E = input(prompt);
prompt = 'Enter Value For deltaE ';
deltaE = input(prompt);
[allState{N:-1:1}] = ndgrid(1:E);               % Create N col matrix with all possible energy configurations
allState = reshape(cat(N+1,allState{:}),[],N);
allStateSum = sum(allState,2);                  % Sum a row of allState and place values into a col matrix
allStateSum = transpose(allStateSum);
deltaEmatrix = (0:deltaE:E+20);                 % create col matrix that increments by deltaE from 0 up to E
Omega = zeros(1,length(deltaEmatrix));          % Initialize Omega matrix, ready to accept values
p = 0;                                          % The first "for loop" ascends from 1 to # of rows of deltaEmatrix 
for pIndex = 1:length(deltaEmatrix)           
    p = p +1;
    q = 0;
    disp(pIndex)
    for qIndex = 1:length(allStateSum)        % Second "for loop" ascends from 1 to # of rows of allStateSum
        q = q +1;
        if allStateSum(1,q) >= deltaEmatrix(1,q) && allStateSum(1,q) < deltaEmatrix(1,q+1)
            Omega(1,p) = Omega(1,p)+1;
        else
            return                              % This section loops through allStateSum and checks if value is between
        end                                     % the deltaE intervals.  If true, add 1 to the pth row of Omega.
        % Each value in allStateSum
        % is checked
    end
end

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per isakson 2022-2-22

在 MATLAB Online 中打开

Replace line 23

return

by

continue

and look up help on the two.

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Answer 1

Voss 2022-2-22

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1655365-why-are-the-for-loops-not-looping#answer_901565

I bet it's because of that return statement. When the code encounters a return the function is exited immediately (thus no more loop iterations will occur).