Subset functions
Subsets of elements can be specified with the RESTRICT directive; alternatively,
subsets can be copied to new structures using the EQUATE directive. These functions
deal with subsets of values.
Forms a logical variate indicating selected units from a variate of
unit numbers
Expand variate by replicating its values
Finds the positions of values within any vector
Forms unique set of values in a numerical data structure
Forms set of units in a variate containing non-zero values
Forms a logical variate indicating currently restricted units
of a vector
In expressions, subsets of structure values can be referred to by qualified identifiers, or by the
function:
Selects values of any structure