Working with Matrices

Index Vectors

You can create a row vector by using the index operator (:). The following statements show that you can use the index operator to count up, count down, or to create a vector of character values with numerical suffixes:

r = 1:5;
s = 10:6;
t = 'abc1':'abc5';

Figure 5.15: Row Vectors Created with the Index Operator

r 1 row 5 cols (numeric)

s 1 row 5 cols (numeric)

t 1 row 5 cols (character, size 4)

To create a vector based on an increment other than 1, use the DO function. For example, if you want a vector that ranges from –1 to 1 by 0.5, use the following statement:

u = do(-1,1,.5);

Figure 5.16: Row Vector Created with the DO Function

u 1 row 5 cols (numeric)

-1

-0.5

0.5