Is there an efficient way to do this circular aggregation?
Use the big class form:
1. Starting from line 20, extract a subset of the data from this row to the previous 19 rows.
2. Classify this subset according to age and summarize height and weight.And one by one concatenation summary results.Thanks!dt = Open( "$SAMPLE_DATA/Big Class.jmp" );
j = 1;
For( j = 20, j <= N Row( dt ), j++,
dt << Select Where( j - 20 < Row() <= j );
d3 = dt << Subset( Output Ta
...