Page 99 - Basics of MATLAB and Beyond

>> t = {’help’ spiral(3) ; eye(2) ’I’’m stuck’};
>> tt = {t t ;t’ fliplr(t)};
>> tt{2,2}{2,1}(5:9)
ans =
stuck

28 Structures

Structures are arrays whose names have dot-separated parts. They can
be used to store information of different kinds together in a hierarchical
structure. Let us do a simple example:
>> staff.name = ’John Smith’
staff =
name: ’John Smith’
>> staff.age = 43
staff =
name: ’John Smith’
age: 43
>> staff.favourites = [1 42 37]
staff =
name: ’John Smith’
age: 43
favourites: [1 42 37]
We have created a structure called staff which is of size 1 × 1:

>> whos
Name Size Bytes Class
staff 1x1 424 struct array
The staff structure has three fields: name, age, and favourites:
>> staff
staff =
name: ’John Smith’
age: 43
favourites: [1 42 37]
To add another staff member’s data to this structure, add subscripts to
define a second element:
staff(2).name = ’Jane Smythe’;
staff(2).age = 30;
staff(2).favourites = [pi eps realmax realmin NaN Inf];
The sizes of the fields do not have to be the same for each element of the
structure. For example, Jane Smythe’s favourite vector contains more
elements than John Smith’s.

c 2000 by CRC Press LLC