Large sparse matrix to matrix error

Asked Nov 07 '15 at 10:25

Active Jul 17 '18 at 11:14

Viewed 6,014 times

I want to apply mice package, but I cannot convert large sparse matrix to matrix.

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)

Error in asMethod(object) : 
      Cholmod error 'problem too large' at file ../Core/cholmod_dense.c, line 105

edited Jul 17 '18 at 11:14

zx8754

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asked Nov 07 '15 at 10:25

chiao-ling Chen

`Error in is.data.frame(x) : object 'a' not found` (line 6) – harre Nov 07 '15 at 10:30
2

What is `a` and why write and read it? I'm skeptical that you can hold a 1e7 x 1e7 dense matrix in RAM and work with it. – Roland Nov 07 '15 at 10:31
I have huge data and it looks like:[link](https://www.quora.com/Loading-a-sparse-matrix-in-r-from-list). I need to apply sparseMatrix to recover it. – chiao-ling Chen Nov 08 '15 at 04:41
9

do you have at least 800gb of ram? (1e7*1e7 * (8) = 800gb ) – Dmitriy Selivanov Nov 18 '15 at 07:47

Large sparse matrix to matrix error

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