You can show the polymorphic VI selector of "write to spreadsheet file" and select an array of strings. Now format the elements as desired.
A few comments:
You are spinning the big loop at a near infinite rate, calculating and displaying the same stuff over and over again. All the graphs need to be calculated only once, so these thing needs to be outside the loop. The only thing that could change are the few controls on the lower right corner, so these could go in a loop. But please place a 100ms wait in the loop or use an event structure.
Can you explain wht the code is supposed to do? Why do you need two different instances of "average array...vi", all you need is one. The code it in makes no sense whatsoever. 🙂