Read Matrix Data
Reads a matrix data file.
read.matrix(file, header = FALSE, sep = "", skip = 0)
- the name of the file which the data are to be read from.
- a logical value indicating whether the file contains the names of the columns as its first line.
- the field separator character. Values on each line of the file are separated by this character.
- the number of lines of the data file to skip before beginning to read data.
Usually each row of the file represents an observation and each column contains a variable. The first row possibly contains the names of the variables (columns).
read.matrix might be more efficient than
read.table for very large data sets.
x <- matrix(0, 10, 10) write(x, "test", ncolumns=10) x <- read.matrix("test") x unlink("test")