Convert between data frames and sparse matrices
as.sparse(x, ...)# S3 method for data.frame
as.sparse(x, ...)
# S3 method for H5Group
as.sparse(x, ...)
# S3 method for Matrix
as.sparse(x, ...)
# S3 method for matrix
as.sparse(x, ...)
# S3 method for Matrix
as.data.frame(x, row.names = NULL, optional = FALSE,
..., stringsAsFactors = default.stringsAsFactors())
An object
Arguments passed to other methods
NULL or a character vector giving the row
names for the data frame. Missing values are not allowed.
logical. If TRUE, setting row names and
converting column names (to syntactic names: see
make.names) is optional. Note that all of R's
base package as.data.frame() methods use
optional only for column names treatment, basically with the
meaning of data.frame(*, check.names = !optional).
See also the make.names argument of the matrix method.
logical: should the character vector be converted to a factor?
as.sparse: A sparse representation of the input data
as.data.frame.Matrix: A data frame representation of the S4 Matrix