isinteger
isinteger(X) returns 1 (true) if all the elements of X are integers and 0 (false) otherwise.
Examples
>> isinteger([1 2 3; 4 5 6]) [ans:true]
>> isinteger([1 1.2]) [ans:false]
>> isinteger([1 2 3; 4 5 6]) [ans:true]
>> isinteger([1 1.2]) [ans:false]