strcmpi compare character strings (case independent) res = strcmpi(string_one, string_two) string_one a character string or matrix of character strings. string_two a character string or matrix of character strings. res a matrix of integers. res = strcmpi(string_one, string_two) returns an integral value indicating the relationship between the strings. The two strings are compared in using the lexicographical order. The value is 0 if string_one is equal to string_two (case independently), 1 if string_one is greater than string_two and -1 else. strcat strcmp