Writes a matrix or data frame to a file or the console, using column labels and a layout respecting columns.
write.matrix(x, file = "", sep = " ", blocksize)matrix or data frame.
name of output file. The default ("") is the console.
The separator between columns.
If supplied and positive, the output is written in blocks of
blocksize rows. Choose as large as possible consistent with
the amount of memory available.
A formatted file is produced, with column headings (if x has them)
and columns of data.
If x is a matrix, supplying blocksize is more
memory-efficient and enables larger matrices to be written, but each
block of rows might be formatted slightly differently.
If x is a data frame, the conversion to a matrix may negate the
memory saving.
Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.