Add Array Elements PtByPt (Not in Base Package)

Returns the sum of all elements determined by sample length.

initialize, when TRUE, initializes the internal state of the VI.
input data is a set of input data.
sample length is the length of each set of incoming data. The VI performs computation for each set of data. The default is 100. When you set sample length to zero, the VI calculates a cumulative solution for the input data from the time that you called or initialized the VI. When the sample length setting is greater than zero, the VI calculates the solution for only the newest set of input data.
sum is the sum of input data. The history length is determined by the last sample length.
error returns any error or warning condition from the VI. Refer to Point By Point Error Codes for more information about these conditions.