Sparse matrix to a data frame in R

Question

I have a sparse matrix

Formal class \'dgCMatrix\' [package \"Matrix\"] with 6 slots
  ..@ i       : int [1:37674] 1836 2297 108 472 1735 1899 2129 2131 5 67         


        

Answer 1

df <- as.data.frame(as.matrix(mat))

as.matrix will turn the sparse matrix to a dense matrix, if it is not too large:-) Then you can convert it to a data frame.

(mat is the example dgCMatrix from @flodel 's answer)