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- W60641320 abstract "This is a (currently very incomplete) write-up of the many smaller and larger design decisions we have made in organizing functionalities in the Matrix package. Classes: There’s a rich hierarchy of matrix classes, which you can visualize as a set of trees whose inner (and “upper”) nodes are virtual classes and only the leaves are non-virtual “actual” classes. Functions and Methods: setAs() others 1 The Matrix class structures Take Martin’s DSC 2007 talk to depict class hierarchy. — — — 1.1 Diagonal Matrices The class of diagonal matrices is worth mentioning for several reasons. First, we have wanted such a class, because multiplication methods are particularly simple with diagonal matrices. The typical constructor is Diagonal() whereas the accessor (as for traditional matrices), diag() simply returns the vector of diagonal entries: > library(Matrix) > (D4 <Diagonal(4, 10*(1:4))) 4 x 4 diagonal matrix of class ddiMatrix [,1] [,2] [,3] [,4] [1,] 10 . . . [2,] . 20 . . [3,] . . 30 . [4,] . . . 40" @default.
- W60641320 created "2016-06-24" @default.
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- W60641320 date "2016-01-01" @default.
- W60641320 modified "2023-09-23" @default.
- W60641320 title "Design Issues in Matrix package Development" @default.
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