Groupfilter command
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Groupfilter command

GROUPFILTER group-name 〚 FIXEDLEN= length 〛 〚 VARLEN= length 〛 〚 ITEM= item-offset 〛 filter

where group-name is defined here.
FIXEDLEN and
VARLEN require integer values to define the fixed and variable number of words in the group definition. If omitted they default to zero.
item-offset is the index of the item in the group, starting from zero, that is being tested
and filter is:

KEEP | REJECT ( expr, expr)

The GROUPFILTER command removes all the items associated with each member of group-name from the current event that do not satisfy the condition specified by filter

Example

GROUPFILTER   CLUST  VARLEN 3 ITEM 1 REJECT (0,0)

would remove all members of group CLUST where the 2nd item for each subset of 3 items was zero.


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