Convert dense objects to sparse representations

as.sparse(x, ...)

# S3 method for data.frame
as.sparse(x, row.names = NULL, ...)

# S3 method for Matrix
as.sparse(x, ...)

# S3 method for matrix
as.sparse(x, ...)

Arguments

x

An object

...

Arguments passed to other methods

row.names

NULL or a character vector giving the row names for the data; missing values are not allowed

Value

A sparse representation of the input data