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.
