| sqlite.matrix {SQLiteDF} | R Documentation |
EXPERIMENTAL: Creates a sqlite matrix (SMAT) from ordinary data frames.
sqlite.matrix(data, name = NULL)
data |
a data vector, data frame or SQLite Data Frame |
name |
the name of the SQLite Matrix |
Creates an SDF with 1 column named V1. The mode of the matrix
is determined from the data, much like as.matrix does. It
is similar to a sqlite.vector and has the additional attributes
sdf.dim and sdf.dimnames comparable to matrix's
dim and {dimnames} attributes.
Internally, it has extra tables sdf_matrix_rownames which holds the row names (and implicitly the row count), and sdf_matrix_colnames which holds the column names (and implicitly the column count).
A S3 object representing the SQLite Matrix.
Miguel A. R. Manese
iris.sdf <- sqlite.data.frame(iris)
im <- sqlite.matrix(iris.sdf[,1:4])
dim(im) # c(150, 4)