input a 1*3 vector

how can I make the user inputs an array of 1*3 dimensions for example x=input('your guess') x= [# # #]

Answer 1

[Stalin Samuel]

inputting a vector

Answer 2

[Walter Roberson]

while true
  xs = input('enter your guess (a list of three numbers)', 's');
  xs = regexprep(xs, '^\[(.*)\]', '$1');
  s = regexp(xs, '(\s|,)+', 'split');
  if length(s) ~= 3
    warning('Wrong number of entries, need 3');
    continue;
  end
  x = str2double(s);
  if any(isnan(x))
    warning('Something was not a number!');
    continue;
  end
  break;
end

Answer 3

[Thorsten]

Use brackets when entering the input

>>  x=input('your guess') 
your guess[1 2 3]

x =

       1     2     3