MATLAB: I want to return back to a certain loop

loops

I have 3 for loops(not nested for loops) and i want to check on the output coming from the third for loop and if it didn't satisfy a certain condition i want it to loop on the 3 loops again till it reaches an optimum solution! so can anyone help me please?

Best Answer

Try something like this

again = true
loopCounter = 1
maxIterations = 1000 % Whatever, to prevent infinite loop
while again && loopCounter  <= maxIterations 
  for k1 = 1 : k1Max
    % Code

  end
  for k2 = 1 : k2Max
    % Code
  end
  for k3 = 1 : k3Max
    % Code to set some condition
  end
  if yourCondition == successCriteria
     again = false;    
  end
  loopCounter = loopCounter + 1; % Increment loop counter
end

Related Solutions

MATLAB: Exit code from program

Try this:

again = true; % Flag for iterating the outer while loop again.
loopCounter1 = 1; % Count iterations to prevent infinite loop.  This is a "fail safe".

loopCounter2 = 1; % Count iterations to prevent infinite loop.  This is a "fail safe".
maxIterations = 9999; % Whatever is the most you ever expect.
while condition1 && again && loopCounter1 < maxIterations
  while condition2 && loopCounter2 < maxIterations
    if condition3
      % statements
      % increment counter
      break; % Breaks out of inner while loop only, loop #2.
    else
      % Here i want to break out without return to any while
      again = false;  % Make sure outer while loop does not iterate again.
      break;
    end
    % Increment counter

    loopCounter2 = loopCounter2 + 1;
  end
  % Increment counter
  loopCounter1 = loopCounter1 + 1;
end

MATLAB: Leave the whole for-loop

Why can't you use break? The break command can perfectly be used in combination with if statements. Break will execute the innermost for (or while) loop it is in...

Consider the following example:

   for ii = 1:10
       disp(['Current value of ii = ', num2str(ii)])
       if ii>5
           % execute some for loops
           for kk=1:5
               for ll=1:5
                   % put your commands here
               end
           end
           % exit the for loop
           break 
       else
           for kk=1:5
              % do something here 
           end
       end 
   end
   disp(['for loop was stopped at the moment that ii = ', num2str(ii)])

The break command will exit the innermost loop (type: help break):

break Terminate execution of WHILE or FOR loop.
    break terminates the execution of FOR and WHILE loops.
    In nested loops, break exits from the innermost loop only.

Does this clarifies it for you?

Best Answer

Related Solutions

MATLAB: Exit code from program

MATLAB: Leave the whole for-loop

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