colVars for dgeMatrix

[PedroMilanezAlmeida]

I am working with large sparse matrices that, after some operations, can return non-sparse matrices of class dgeMatrix.

I must be missing something here, but when I try to get colVars for a dgeMatrix, I get

Error in MatrixGenerics:::.load_next_suggested_package_to_search(x) : 
  Failed to find a colVars() method for dgeMatrix objects.

even though colMeans2 works just fine.

Here is some (hopefully) reproducible code:

m <- Matrix(nrow = 3, ncol = 6, data = rnorm(18), sparse = FALSE)
sparseMatrixStats::colVars(m)

PS: matrixStats::colVars(m) returns

Error in matrixStats::colVars(m) : 
  Argument 'x' must be a matrix or a vector.

and calling as.matrix prior to matrixStats::colVars is very slow on larger matrices.

Any help would be much appreciated.