Mixed function

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A mixed function is one of a class of primitive functions that consider their entire arguments rather than treating each element at a time. The exact parts of an argument that is considered as a unit, varies per function, rather than adhering to a general rule. Hence the name "mixed" as in a "mixed bag" of functions. This is opposed to scalar functions which are defined in terms of operations on simple scalars.

For example, while Equal (=) is a scalar function in that it compares (corresponding) elements, Match () gives a single result which indicates if the arguments, as wholes, are identical.

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APL features [edit]
Built-ins Primitives (functions, operators) ∙ Quad name
Array model ShapeRankDepthBoundIndex (Indexing) ∙ AxisRavelRavel orderElementScalarVectorMatrixSimple scalarSimple arrayNested arrayCellMajor cellSubarrayEmpty arrayPrototype
Data types Number (Boolean, Complex number) ∙ Character (String) ∙ BoxNamespace
Concepts and paradigms Conformability (Scalar extension, Leading axis agreement) ∙ Scalar function (Pervasion) ∙ Identity elementComplex floorTotal array orderingTacit programming (Function composition, Close composition) ∙ Glyph
Errors LIMIT ERRORRANK ERRORSYNTAX ERRORDOMAIN ERRORLENGTH ERRORINDEX ERRORVALUE ERROR