inst/sparseMatrixExamples.R

In paulij/recommendMovies: Recommend Movies

library(Matrix)

i <- c(1,3:8); j <- c(2,9,6:10); x <- 7 * (1:7)
(A <- sparseMatrix(i, j, x = x))
summary(A)
str(A) # note that *internally* 0-based row indices are used
## dims can be larger than the maximum row or column indices
(AA <- sparseMatrix(c(1,3:8), c(2,9,6:10), x = 7 * (1:7), dims = c(10,20)))
summary(AA)