Logical Functions ◆Function Purpose ischar (a) Returns a 1 if a is a character array and a 0 otherwise. isempty (a) Returns a 1 if a is an empty array and a 0 otherwise. isinf (a) Returns a 1 if the value of a is infinite (Inf) and a 0 otherwise. isnan(a) Returns a 1 if the value of a is NaN (not a number)and a 0 otherwise. isnumeric (a) Returns a l if the a is a numeric array and a 0 otherwise. 2015-2-4 32015-2-4 3 Logical Functions  Returns a l if the a is a numeric array and a 0 otherwise. isnumeric (a) Returns a 1 if the value of a is NaN (not a number) and a 0 otherwise. isnan (a) Returns a 1 if the value of a is infinite (Inf) and a 0 otherwise. isinf (a) Returns a 1 if a is an empty array and a 0 otherwise. isempty (a) Returns a 1 if a is a character array and a 0 otherwise. ischar (a) Function Purpose