special.matrix | R Documentation |
Creates an Identity Matrix I and a Matrix of Ones J.
I
(): Creates an identity matrix where the number of columns is n. This is a diagonal matrix with all equal to one (1). An identity matrix is usually written as I. Names of rows and columns (dimnames
) are included.
J
(): Creates a matrix of ones with any number of rows and columns. Names of rows and columns (dimnames
) are included.
I(n) J(n, m = n)
n |
Number of rows in I or J. |
m |
Number of columns in J. Default: Same as number of rows. |
Other matrix:
tr()
,
vec()
# To create an identity matrix of order 12 I(2) # To make a matrix of 6 rows and 10 columns of all ones J(6, 10) # To make a matrix of unity, dimensions 6 x 6. J(6)
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