Stay in the loop without changing counter until condition met

I have a loop where, say, five numerical inputs are requested from the user. And I want the inputs to be either number 1,2 or 3. If they enter anything else, I don't want the counter to work, simple to stay in the loop until they enter five numbers, all of them either 1,2 or 3. I tried while loop with break, but it didnt work. Is there anyway to do it? Here is a basic code:

 i=1;
for i=1:5 
Rx=input('Type in a number:');
if Rx==1
    disp('one')
elseif Rx==2
    disp('two') 
elseif Rx==3 
    disp('three')   
else
    disp('wrong')
end
end

Answer 1

[Stephen23]

MATLAB is most effective when you learn to use arrays to hold your data, so this task becomes quite simple when we store those values in vector:

oky = 1:3; % must match these values
vec = NaN(1,5); % output vector
while any(~ismember(vec,oky))
  idx = find(~ismember(vec,oky),1,'first');
  str = input(sprintf('Please enter value %d: ',idx),'s');
  num = str2double(str);
  if ismember(num,oky)
    vec(idx) = num;
  end
end

And using:

Please enter value 1: 4
Please enter value 1: 5
Please enter value 1: 2
Please enter value 2: 1
Please enter value 3: 3
Please enter value 4: 8
Please enter value 4: 8
Please enter value 4: 2
Please enter value 5: 1

and the output values are stored conveniently in one vector:

>> vec
vec =  2  1  3  2  1

You should also put a limit on the number of iterations that the loop can perform, otherwise users will have no way to exit the loop.