Calculates the partial sum of a series.
PARTSUM(series)
series |
- |
A series or table. |
A series or table.
partsum({20, 15, 30, 10, 25})
returns a series containing the cumulative sums {20, 35, 65, 75, 100}.
The n^{th} value of the output series is equal to the sum of the first n points of the input series:
or by the equivalent difference equation:
PARTSUM calculates the cumulative sum of a series. PARTSUM differs from integration in that the DELTAX information is not incorporated into the calculation.
See PARTPROD to calculate the partial product.