reg mat power

[ambi ka]

Sir,
In matpower, what is the significance of "nargin" and "nargout"
I am doing reactive power optimization. So i have to generate control variables 
randomly and using that random variables i have to run "runpf" again. But it is 
not accepting. i dont know why?
I specified the variables under the "read heading" in runpf program.
from
ambika
AP/ sri krishna college of technology