Practical 3: Arrays: Array Subscripts

MATLAB Short Course

Subscripts, or indices, are used to refer to elements at a specified location in an array.

In MATLAB, A(i) is the $i$ ^th element in the array A and $i$ is the index (or position).

You can refer to one or more elements and use these to create new scalar variables or sub-arrays.

> Type in the following code and decide which commands create scalars and which arrays.

> Check the output and determine the process by which the elements have been selected:

A= linspace(5,100,20)

A(1)

A(7)

A(3:6)

> Now create two new sub-arrays of A as follows:

a4 = A(1:2:13)

a5 = A(8:-3:2)

> Recall the elements in the sub-arrays as follows:

a4(2)

a5(1:3)