triplets_to_matrix {CMF} | R Documentation |
This function is the inverse of matrix_to_triplets
.
It converts a matrix represented as a set of triplets into
an object of the class matrix
. The missing entries
(the ones not present in the triplet representation) are
filled in as NA.
triplets_to_matrix(triplets)
triplets |
A matrix in triplet/coordinate format |
See matrix_to_triplets
for a description of the
representation.
The input matrix as a normal matrix of class matrix
Arto Klami and Lauri VĂ¤re
x <- matrix(c(1,2,NA,NA,5,6),nrow=3) triplet <- matrix_to_triplets(x) print(triplet) xnew <- triplets_to_matrix(triplet) print(xnew)