triplets_to_matrix {CMF}

Conversion from triplet/coordinate format to matrix

Description

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.

Usage

triplets_to_matrix(triplets)

Arguments

triplets

A matrix in triplet/coordinate format

Details

See matrix_to_triplets() for a description of the representation.

Value

The input matrix as a normal matrix of class matrix

Author(s)

Arto Klami and Lauri Väre

See Also

matrix_to_triplets()

Examples

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)