splr: create a 'SparseplusLowRank' object

In softImpute: Matrix Completion via Iterative Soft-Thresholded SVD

create a SparseplusLowRank object

Description

create an object of class SparseplusLowRank which can be efficiently stored and for which efficient linear algebra operations are possible.

Usage

splr(x, a = NULL, b = NULL)

Arguments

x	sparse matrix with dimension say m x n
a	matrix with m rows and number of columns r less than min(dim(x))
b	matrix with n rows and number of columns r less than min(dim(x))

Value

an object of S4 class SparseplusLowRank is returned with slots x, a and b

Author(s)

Trevor Hastie

See Also

SparseplusLowRank-class, softImpute

Examples

x=matrix(sample(c(3,0),15,replace=TRUE),5,3)
x=as(x,"sparseMatrix")
a=matrix(rnorm(10),5,2)
b=matrix(rnorm(6),3,2)
new("SparseplusLowRank",x=x,a=a,b=b)
splr(x,a,b)

softImpute documentation built on June 10, 2025, 9:10 a.m.