Computes a nonoverlapping block average of a series.
BLOCKAVG(series, N, rampflag)
series 
 
Any series, table, or expression resulting in a series or table.  
N 
 
An integer, the points per block to average as the series is processed.  
rampflag 
 
Optional. An integer, endpoint averaging flag.

A series or table, the N point block average.
W1: 1..12
W2: blockavg(W1, 2)
returns the series {1.5, 3.5, 5.5, 7.5, 9.5, 11.5}
W3: 1..12
W4: blockavg(W3, 3)
returns the series {2, 5, 8, 11}
BLOCKAVG computes the Npoint nonoverlapping block average of a series by decimating the standard Npoint moving average. If the block size is not an integral fraction of the series length, the end points are not averaged.
See MOVAVG to compute an Npoint moving average and a description of rampflag.
See BLOCKMEDIAN to compute the block median of a series.