Matrix (version 0.995-12)

dgTMatrix-class: Sparse matrices in triplet form

Description

The "dgTMatrix" class is the class of sparse matrices stored as (possibly redundant) triplets.

Objects from the Class

Objects can be created by calls of the form new("dgTMatrix", ...).

See Also

Class dgCMatrix

Examples

m <- Matrix(0+1:28, nrow = 4)
m[-3,c(2,4:5,7)] <- m[ 3, 1:4] <- m[1:3, 6] <- 0
(mT <- as(m, "dgTMatrix"))
str(mT)
mT[1,]
mT[4, drop = FALSE]