I'm using MATLAB grader for an assignment in my class, and this assignment has worked before, but now is not. The code that's being run is this:
num1 = ;
den1 = [1 1];
filter1 = tf(num1, den1)
And the error:
Undefined function 'tf' for input arguments of type 'double'.
Error in solution (line 3)
filter1 = tf(num1, den1) %Filter transfer function object