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how to see graph in output

hi

how to check the output of program in form of graph? my sine wave program built successfully and program loaded. after run, when i select view->graph->time-frequency,it gives me blank screen.what else to be done?

how to get my graph there?some break points are to be made? i am not able to understand from tutorial.it says about sine.dat file but what if i dont have any such file in advance?

please help.