packedMatrix-class function

Virtual Class "packedMatrix" of Packed Dense Matrices

Class "packedMatrix" is the virtual class of dense symmetric or triangular matrices in "packed" format, storing only the choose(n+1,2) == n*(n+1)/2 elements of the upper or lower triangle of an n-by-n matrix. It is used to define common methods for efficient subsetting, transposing, etc. of its proper subclasses: currently "[dln]spMatrix"

(packed symmetric), "[dln]tpMatrix" (packed triangular), and subclasses of these, such as "dppMatrix".

class

Slots

• uplo:: "character"; either "U", for upper triangular, and "L", for lower.
• Dim, Dimnames:: as all Matrix objects.

Extends

Class "denseMatrix", directly. Class "Matrix", by class "denseMatrix", distance 2.

Methods

• pack: signature(x = "packedMatrix"): ...
• unpack: signature(x = "packedMatrix"): ...
• isSymmetric: signature(object = "packedMatrix"): ...
• isTriangular: signature(object = "packedMatrix"): ...
• isDiagonal: signature(object = "packedMatrix"): ...
• t: signature(x = "packedMatrix"): ...
• diag: signature(x = "packedMatrix"): ...
• diag<-: signature(x = "packedMatrix"): ...

Author(s)

Mikael Jagan

See Also

pack and unpack; its virtual "complement" "unpackedMatrix"; its proper subclasses "dspMatrix", "ltpMatrix", etc.

Examples

showClass("packedMatrix")
showMethods(classes = "packedMatrix")