DOCUMENTATION CENTER SEARCH

Mathematica > Sparse Arrays >

Built-in Mathematica Symbol

Tutorials »|See Also »|More About »

ArrayRules

ArrayRules[SparseArray[...]]
gives the rules {pos₁->val₁, pos₂->val₂, ...} specifying elements in a sparse array.

ArrayRules[list]
gives rules for SparseArray[list].

MORE INFORMATION

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. »

Applications (4)

Properties & Relations (2)

SparseArray Position Normal

Getting and Setting Pieces of Matrices

Sparse Arrays: Manipulating Lists

Sparse Arrays: Linear Algebra

Elements of Lists

Matrices and Linear Algebra

Parts of Matrices

Sparse Arrays

New in 5

© 2008 Wolfram Research, Inc.

Ask a question about this page | Suggest an improvement | Leave a message for the team