Large sparse matrix to the matrix R

Question

I want to apply a package of mice, but I cannot convert a large sparse matrix into a matrix in R.

library(Matrix) library(mice) i=c(2,9,6:10^7) j=c(2,9,6:10^7) x=7*(1:7^7) write.csv(a,"a.csv") c=read.csv("a.csv") w=sparseMatrix(i=c[,1],j=c[,2],x=c[,3]) w=as.matrix(w) w=as.matrix(w) Error in asMethod(object) : Cholmod error 'problem too large' at file ../Core/cholmod_dense.c, line 105