created 09/29/97; revised 08/06/00; 07/20/03; 07/20/09; 01/07/2015
The previous chapter discussed addition of column matrices. This is an easy, mechanical procedure. This chapter shows why it is a useful procedure by discussing how it represents the operation of vector addition.
Just for practice, add the following two column matrices:
a = ( 3, 2 )T b = (-2, 1 )T