ArrayRules

Usage

• ArrayRules[SparseArray[ ... ]] gives the rules {->, ->, ... } specifying elements in a sparse array.
• ArrayRules[list] gives rules for SparseArray[list].

Notes

• The last element of ArrayRules[s] is always {_, _, ... } -> def, where def is the default value for unspecified elements in the sparse array.

• ArrayRules[list, val] takes the default value to be val.

• ArrayRules[list] assumes a default value of 0.

• See Section 3.7.2 and Section 3.7.12.

• See also: Position, Normal.

• New in Version 5.

• Advanced Documentation.

Further Examples