Hi Love Kumar
I understood your point and i know what you are referring to . Look the command that outputport 1 = InputPort 1 is written by default at the beginning as we want the incoming signal to pass to the output and regarding you type of signal issue the thing is that when you write a program you obviously write a code accordingly in or to get the required type of signal at output. And when we load the matlab file it automatically updates the type of signal in the code itself provided the code is valid and makes sure about the type of signal. Its all within the code and as such u need not make changes and even if u want to u still can.
Regards
Burhan