[Discuss-gnuradio] Vector Source_Sink and Flow Control

[Umair Naeem]

I need to ask two questions...

1) What is the purpose of vector sink and/or vector source in GRC. If i convert 
a stream from USRP2 into a vector and connect the result to a vector sink, what 
information i can have and how do i acess that vector (ploting or writing to a 
file etc)..

2) I need to invoke/run certain type of file from GRC (like .cpp). If i have a 
working flow graph, is it posible to add certain functin/button to open or 
execute certain command (may be thru terminal)? I also ned to know about 
controlling the flow graph through buttons etc (like when i press certain 
button then it shouls show FFT graph etc)...


Regards,
Umair Naeem
MSc Communication Engineering
Chalmers University ot Technology, Sweden.