رفع خطای not enough input arguments

[s9533906]

با سلام
من یک برنامه نوشتم و مدام خطا میده not enough input arguments. برای رفع مشکل باید چکار کنم؟
برنامه این هست:

function busdt = busdatas(num)
% |Bus | Type | Vsp | theta | PGi | QGi | PLi | QLi | Qmin | Qmax |
busdata14 = [ 1 1 1.060 0 0 0 0 0 0 0;
2 2 1.045 0 40 42.4 21.7 12.7 -40 50;
3 2 1.010 0 0 23.4 94.2 19.0 0 40;
4 3 1.0 0 0 0 47.8 -3.9 0 0;
5 3 1.0 0 0 0 7.6 1.6 0 0;
6 2 1.070 0 0 12.2 11.2 7.5 -6 24;
7 3 1.0 0 0 0 0.0 0.0 0 0;
8 2 1.090 0 0 17.4 0.0 0.0 -6 24;
9 3 1.0 0 0 0 29.5 16.6 0 0;
10 3 1.0 0 0 0 9.0 5.8 0 0;
11 3 1.0 0 0 0 3.5 1.8 0 0;
12 3 1.0 0 0 0 6.1 1.6 0 0;
13 3 1.0 0 0 0 13.5 5.8 0 0;
14 3 1.0 0 0 0 14.9 5.0 0 0;];

% |Bus | Type | Vsp | theta | PGi | QGi | PLi | QLi | Qmin | Qmax |
busdata30 = [ 1 1 1.06 0 0 0 0 0 0 0;
2 2 1.043 0 40 50.0 21.7 12.7 -40 50;
3 3 1.0 0 0 0 2.4 1.2 0 0;
4 3 1.06 0 0 0 7.6 1.6 0 0;
5 2 1.01 0 0 37.0 94.2 19.0 -40 40;
6 3 1.0 0 0 0 0.0 0.0 0 0;
7 3 1.0 0 0 0 22.8 10.9 0 0;
8 2 1.01 0 0 37.3 30.0 30.0 -10 40;
9 3 1.0 0 0 0 0.0 0.0 0 0;
10 3 1.0 0 0 0 5.8 2.0 0 0;
11 2 1.082 0 0 16.2 0.0 0.0 -6 24;
12 3 1.0 0 0 0 11.2 7.5 0 0;
13 2 1.071 0 0 10.6 0.0 0.0 -6 24;
14 3 1.0 0 0 0 6.2 1.6 0 0;
15 3 1.0 0 0 0 8.2 2.5 0 0;
16 3 1.0 0 0 0 3.5 1.8 0 0;
17 3 1.0 0 0 0 9.0 5.8 0 0;
18 3 1.0 0 0 0 3.2 0.9 0 0;
19 3 1.0 0 0 0 9.5 3.4 0 0;
20 3 1.0 0 0 0 2.2 0.7 0 0;
21 3 1.0 0 0 0 17.5 11.2 0 0;
22 3 1.0 0 0 0 0.0 0.0 0 0;
23 3 1.0 0 0 0 3.2 1.6 0 0;
24 3 1.0 0 0 0 8.7 6.7 0 0;
25 3 1.0 0 0 0 0.0 0.0 0 0;
26 3 1.0 0 0 0 3.5 2.3 0 0;
27 3 1.0 0 0 0 0.0 0.0 0 0;
28 3 1.0 0 0 0 0.0 0.0 0 0;
29 3 1.0 0 0 0 2.4 0.9 0 0;
30 3 1.0 0 0 0 10.6 1.9 0 0 ];

switch num
case 14
busdt = busdata14;
case 30
busdt = busdata30;
end

و خطا هم این هست:

>> busdatas
Not enough input arguments.
Error in busdatas (line 52)
switch num