Hello! 
I have made a graph that plots sensor signals, and i have it in a class 
such Qt4 GUI can show it in widget. I have tried few things lately but it 
haven't fulfilled my wishes. 
I want my graph to reset/reload or whatever you want to call it when i want 
to start new measurements, that is graph with no data plotted. 
I've been trying repaint, update etc but can't quite get it to work, matter 
fact i dont understand if i am using repaint/update correctly.

Any suggestions how i may solve this issue? 

Best Regards, 

Hamza 

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