I/O Operations with Sparse Matrices

Fast 'SVMlight' reader and writer. 'SVMlight' is most commonly used format for storing sparse matrices (possibly with some target variable) on disk. For additional information about 'SVMlight' format see < http://svmlight.joachims.org/>.

sparsio is an R package for I/O operations with sparse matrices. At the moment it provides fast svmlight reader and writer.

• read_svmlight()
• write_svmlight()

The only dependency is Rcpp

Package is not on CRAN yet, so you can install it with devtools:

devtools::install_github("dselivanov/sparsio")

Quick reference

library(Matrix)
library(sparsio)
i = 1:8
j = 1:8
v = rep(2, 8)
x = sparseMatrix(i, j, x = v)
y = sample(c(0, 1), nrow(x), replace = TRUE)
f = tempfile(fileext = ".svmlight")
write_svmlight(x, y, f)
x2 = read_svmlight(f, type = "CsparseMatrix")
identical(x2$x, x)
identical(x2$y, y)