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DiagonalMatrix

DiagonalMatrix[list]
gives a matrix with the elements of list on the leading diagonal, and 0 elsewhere.

DiagonalMatrix[list, k]
gives a matrix with the elements of list on the k

diagonal.

DiagonalMatrix[list, k, n]
pads with 0s to create an

×

matrix.

MORE INFORMATION

For positive k, DiagonalMatrix[list, k] puts the elements k positions above the main diagonal. DiagonalMatrix[list, -k] puts the elements k positions below.

DiagonalMatrix[list, k] fills the k diagonal of a square matrix with the elements from list. Different values of k lead to different matrix dimensions.

DiagonalMatrix[list, k, n] always creates an × matrix, even if this requires dropping elements of list. »

DiagonalMatrix[list, k, {m, n}] creates an × matrix.

DiagonalMatrix[SparseArray[...], ...] gives a SparseArray object.

Basic Examples (1)

Construct a diagonal matrix:

Out[1]//MatrixForm=

A superdiagonal matrix:

Out[2]//MatrixForm=

A subdiagonal matrix:

Out[3]//MatrixForm=

Applications (4)

Properties & Relations (6)

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New in 7.0: Lists and Matrices

Demonstrations with DiagonalMatrix (Wolfram Demonstrations Project)

New in 1 | Last modified in 7

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