An index can be any kind of expression, but the value of the expression has to be a positive integer, and it has to be less than or equal to the length of the vector. >> Y(0) Array indices must be pos...An index can be any kind of expression, but the value of the expression has to be a positive integer, and it has to be less than or equal to the length of the vector. >> Y(0) Array indices must be positive integers or logical values. If it’s not an integer, you get an error: >> Y(1.5) Array indices must be positive integers or logical values. If the index is too big, you also get an error: The error messages use the word array rather than matrix, but they mean the same thing, at least for now.
