You are working with the text-only light edition of "H.Lohninger: Teach/Me Data Analysis, Springer-Verlag, Berlin-New York-Tokyo, 1999. ISBN 3-540-14743-8". Click here for further information. |
Table of Contents Math Background Matrices Identity Matrix | |
See also: fundamentals |
A matrix which exclusively consists of zeroes except the principal diagonal,
is called a diagonal matrix. It is usually denoted by diag(a_{11},
a_{22}, ..., a_{nn}). The matrix diag(1, 1,..., 1) with
n 1s is called the identity matrix of order n. We denote the identity matrix
of order n by I, or if the order is relevant, by I_{n}.
Last Update: 2005-Jul-16