This cannot work reliably. Remember, that most decimal numbers cannot be represented exactly in binary format. Therefor some numbers, which are displayed as "0.23" might be stored as "0.22999999999999998" internally. So to do, what you are asking for, using the decimal places is a bad choice of input arguments.
But using strings or CHAR arrays works find, when you specify a number of rounded decimals.
num = [0.23, 0.53, 0.04, 0.56];
str = sprintf('%02.0f', num * 100)
str = [str(1:2:end), str(2:2:end)]
