Subsets of elements can be specified with the RESTRICT directive; alternatively, subsets can be copied to new structures using the EQUATE directive. These functions provide other ways of manipulating subsets of values.
EXPAND |
Forms a logical variate indicating selected units from a variate of unit numbers |
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NEXPAND |
Expand variate by replicating its values |
POSITION |
Finds the positions of values within any vector |
REPLACE |
Replaces values within any numerical data structure |
UNIQUE |
Forms unique set of values in a numerical data structure |
WHERE |
Forms set of units in a variate containing logically true (i.e. non-zero) values |
WHICH |
Synonym of WHERE |
RESTRICTION |
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:
ELEMENTS |
Selects values of any structure |
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