eye — Identity matrix
eye generates an identity matrix. This is a matrix with each
element on the main diagonal set to 1 and all other elements set to
0. If the arguments are two scalars, the first specifies the number
of rows and the second specifies the number of columns in the resultant.
If the argument is a matrix, then it must have two elements, with the
first element specifying the number of rows, and the second element
specifying the number of columns in the result.
This is not an built-in function. This function
is normally loaded on start-up from the eye.r file in the
standard rlib directory. Use of the -r option, incorrectly
setting the RLAB_LIB_DIR environmental variable, or modifying
eye.r may make this function unavailable.
Subsections