The simples solution when you only have 1 area of interrest is using the "In Range?" vi.
If you have more area's you can use following method:
Use the Threshold 1D array vi.
Build a range array with 0, 9.005, 10.005, 11.005, 100.
Now wire your array via a loop to the "threshold y" (enable indexing).
Wire the range array to the "array of number of points" input (disable indexing).
The output-array is the index of what area each value is in.