Elements of Lists - Wolfram Mathematica 8 Documentation

MATHEMATICA GUIDE

Elements of Lists

Mathematica provides a carefully chosen set of functions for accessing elements of lists either using indices or positions, or using patterns or criteria for their values.

list[[...]] (Part) — parts of lists, resettable with

Span (;;) — general specification for spans or blocks of elements

First ▪ Last ▪ Rest ▪ Most ▪ Take ▪ Drop ▪ TakeWhile

Append ▪ Prepend ▪ Insert ▪ Delete ▪ AppendTo ▪ PrependTo

Position — find positions of elements matching a pattern

Extract ▪ ReplacePart ▪ MapAt ▪ ArrayRules ▪ Ordering

Length ▪ Dimensions ▪ ArrayDepth ▪ LengthWhile

Select — select elements that satisfy a criterion

Cases — give elements that match a pattern

Pick ▪ DeleteCases ▪ BinLists ▪ Count ▪ DeleteDuplicates

MemberQ — test whether an element is a member of a list

FreeQ ▪ ArrayQ ▪ VectorQ ▪ MatrixQ

TUTORIALS

Manipulating Elements of Lists

Adding, Removing, and Modifying List Elements

Getting Pieces of Lists

Testing and Searching List Elements

Manipulating Lists by Their Indices

MORE ABOUT

Parts of Matrices

Parts of Expressions

Rearranging & Restructuring Lists

Constructing Lists

Handling Arrays of Data