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triplet {spam}

Transform a spam format to triplets
Package: 
spam
Version: 
0.40-0

Description

Returns a list containing the indices and elements of a spam object.

Usage

triplet(x, tri=FALSE)

Arguments

x
sparse matrix of class spam or a matrix.
tri
Boolean indicating whether to create individual row and column indices vectors.

Details

The elements are row (column) first if x is a spam object (matrix).

Values

A list with elements

indices
a by two matrix containing the indices if tri=FALSE.
i,j
vectors containing the row and column indices if tri=TRUE.
values
a vector containing the matrix elements.

See Also

spam.list for the inverse operation and foreign for other transformations.

Examples

x <- diag.spam(1:4)
x[2,3] <- 5
triplet(x)
all.equal( spam( triplet(x, tri=TRUE)), x)

Author(s)

Reinhard Furrer

Documentation reproduced from package spam, version 0.40-0. License: GPL | file LICENSE