Can I run all cases of switch ? if not, is there another way ?

The attached code is running only one of the cases randomly. My question Can I execute all cases in random way, for example run the third loop (case 3) then the first loop (case 1) and after that the second loop (case 2 ) and then iterate the MAIN LOOP as shown below. If that can't be done, I appreciate another way if its possible.

Thanks in advance

for q=1:5                    % MAIN LOOP 
    t = randperm(3,1);     
    switch t 
        case 1 
            for q1=1:10                % Loop 1 
                disp(1); 
            end 
        case 2 
            for q2=1:10                % Loop 2 
                disp(2); 
            end 
        case 3 
            for q3=1:10                % Loop 3 
                disp(3); 
            end 
    end 
end

Answer 1

[dpb]

That's just putting the switch block inside another loop...

...
M=5;                        % outer loop counter
N=3;                        % number switch blocks
for q=1:M                   % MAIN LOOP 
  for t=randperm(N)         % execute the |switch| randomly in sequence for all cases
    switch t 
        case 1 
            for q1=1:10                % Loop 1 
                disp(1); 
            end 
        case 2 
            for q2=1:10                % Loop 2 
                disp(2); 
            end 
        case 3 
            for q3=1:10                % Loop 3 
                disp(3); 
            end 
    end 
  end
end

The above will do all cases in random order each time with no repeats; one could choose alternate sampling patterns as well, of course of "N of K" or even not require no replications.

[omar th]

First, thank you so much for your response,

But there is something missing in " for t " plus I got an error which is " SWITCH expression must be a scalar or a character vector. "

[Torsten]

Maybe you mean

M=5;                        % outer loop counter
N=3;                        % number switch blocks
for q=1:M                   % MAIN LOOP 
  t = randi(N);        % set the random execution sequence 
  switch t 
     case 1 
        for q1=1:10                % Loop 1 
           disp(1); 
        end 
     case 2 
        for q2=1:10                % Loop 2 
           disp(2); 
        end 
     case 3 
        for q3=1:10                % Loop 3 
            disp(3); 
        end 
  end
end

[dpb]

Huh. I'd forgotten that; I was thinking the for...end construct would just use the array by itself as the iterator; it has to have the assignment; I had created the intermediary variable so you could use the debugger and see what it was for each pass while playing around...

I patched the Answer code above, the difference is; just write

for t=randperm(N)
  ...

instead and all will be well....

[omar th]

this is already same as my code (my code in the question above). I want in each iteration of the MAIN LOOP three inner loops (cases) executed but randomly NOT only execute only one case

[dpb]

See patched Answer/Comment above...

N=3;
for i=1:2
  fprintf('i: %d\n',i)  
  for t=randperm(N)
    disp(t)
  end
end

i: 1

     2

     1

     3

i: 2

     2

     3

     1

[omar th]

Sorry for any an inconvienence, Its worked I really appreciate that

Answer 2

[Walter Roberson]

https://www.mathworks.com/matlabcentral/answers/1903645-how-can-i-randomly-excuted-for-loops-inside-main-for-loop-instead-of-run-them-in-ordered#comment_2624825

I already gave you code that permits you to exactly control the minimum number of times each of the cases is to be executed (in a random order), with any remaining iterations to be chosen at random.

[dpb]

Hadn't realized you'd already solved it, Walter. This was first I saw OP's plea...

[omar th]

@Walter Roberson thank you so much, and sorry for not realizing your answer.