TF is true, if the first n characters of strings A and B are lexicographically equal, disregarding case of alphabetic characters. If one input is a string array, the other input can be a string array, a character vector, or a cell array of character vectors.

If either A or B is a string array or a cell array of character vectors, then a logical array TF of the same size is returned, containing the values described above for every member of the array. In this case, the other argument may also be a string array or a cell array of character vectors (of the same size or scalar), or a character vector.

Source Code: string