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BUILT-IN MATHEMATICA SYMBOL
SymmetrizedArray
SymmetrizedArray[{pos1->val1, pos2->val2, ...}, dims, sym]
yields an array of dimensions dims whose entries are given by those in the rules 
or through the symmetry sym.
SymmetrizedArray[list]
yields a symmetrized array version of list.
Details
- SymmetrizedArray takes unspecified elements to be 0.
- SymmetrizedArray[data, ...] is converted to an expression of the form StructuredArray[SymmetrizedArray, dims, structureddata], where structureddata contains the symmetry and independent component rules corresponding to the input.
- Normal[SymmetrizedArray[...]] gives the ordinary array corresponding to a symmetrized array object.
- SymmetrizedArrayRules[SymmetrizedArray[...]] gives the list of independent rules
. - ArrayRules[SymmetrizedArray[...]] gives the list of both dependent and independent rules
. - The elements in a SymmetrizedArray object need not be numeric.
- The position specifications
can contain patterns. - With rules
, the 
are evaluated separately for each independent component that matches 
. - SymmetrizedArray[list] requires that list be a full array, with all parts at a particular level being lists of the same length.
- The individual elements of a symmetrized array cannot themselves be lists.
- SymmetrizedArray[rules] yields a symmetrized array, with dimensions exactly large enough to include elements whose positions have been explicitly specified.
- StructuredArray[SymmetrizedArray, ...] is treated as a raw object by functions like AtomQ and for purposes of pattern matching.
New in 9
