Roots grpcum() Function

Sum the values of block[numfld].

The sums are distributed by the block-line groups of groups/nextLine.

For group g: block lines of groups[g]/nextLine are processed.

The sum of block[numfld] is computed and stored in sums[g].

Syntax

Roots.grpcum(block, cpl, numfld, groups, nextLine, nGroup, sums)

Parameter Values

Parameter	Description
block	Uint8Array memory block
cpl	The width of a memory block line
numfid	Field definition that specifies the location of the number within a block line
groups	The starting line number of each group (type Array)
nextLine	Subsequent line numbers array
nGroup	The number of groups
sums	Storage array for the calculated sums