New in 7.0: Lists and Matrices
Mathematica 7 extends its general treatment of lists and matrices by adding a variety of convenient functions, including support for common convolution and structure matrices.
List Operations
Gather, GatherBy — gather equivalent elements into sublists
Ratios — find successive ratios of elements in a list
Matrix Construction
IdentityMatrix, DiagonalMatrix (modified) — create rectangular matrices
ConstantArray (modified) ▪ PauliMatrix ▪ LeviCivitaTensor ▪ UnitVector
CrossMatrix ▪ DiamondMatrix ▪ DiskMatrix ▪ BoxMatrix
Operations on Matrices
ArrayPad — add padding of many types to an array in any number of dimensions
UpperTriangularize, LowerTriangularize — extract parts of a matrix
SymmetricMatrixQ — test whether given matrix is symmetric
SchurDecomposition (modified) ▪ RealBlockDiagonalForm (modified)