Clear array and take average of values in array continuously

[vkhatri]

I have a continuous signal that I am acquiring with hardware (sampling at 1000Hz).  I want to be able to insert the data into a 1D array for 5 seconds, and then take the average of these 5000 samples.  So basically, every 5 seconds I need to take the average of a 1D array and create a new array for the next 5000 samples.

[altenbach]

There is no reason to accumulate the data into an array if all you need is the average.

Simply add the values into a shift register. Every 5000 points devide the sum by 5000, output the average, and zero the shift register for the next series of data..