Map to Different Value Types
It is fairly common to store other classes, such as structures or cell arrays, in a Map structure.
However, Maps are most memory efficient when the data stored in them belongs to one of the basic
MATLAB types such as double, char, integers, and logicals.
Map to Structure Array
The following example maps airline seat numbers to structures that contain ticket numbers and
destinations. Start with the Map ticketMap, which maps ticket numbers to passengers:
ticketMap = containers.Map(...
{'2R175', 'B7398', 'A479GY', 'NZ1452'}, ...
{'James Enright', 'Carl Haynes', 'Sarah Latham', ...
'Bradley Reid'});
Then create the following structure array, containing ticket numbers and destinations:
s1.ticketNum = '2S185'; s1.destination = 'Barbados';
s1.reserved = '06-May-2008'; s1.origin = 'La Guardia';
s2.ticketNum = '947F4'; s2.destination = 'St. John';
s2.reserved = '14-Apr-2008'; s2.origin = 'Oakland';
s3.ticketNum = 'A479GY'; s3.destination = 'St. Lucia';
s3.reserved = '28-Mar-2008'; s3.origin = 'JFK';
s4.ticketNum = 'B7398'; s4.destination = 'Granada';
s4.reserved = '30-Apr-2008'; s4.origin = 'JFK';
s5.ticketNum = 'NZ1452'; s5.destination = 'Aruba';
s5.reserved = '01-May-2008'; s5.origin = 'Denver';
Map five seats to these structures:
seatingMap = containers.Map( ...
{'23F', '15C', '15B', '09C', '12D'}, ...
{s5, s1, s3, s4, s2});
Using this Map object, find information about the passenger who has reserved seat 09C:
seatingMap('09C')
ans =
ticketNum: 'B7398'
destination: 'Granada'
reserved: '30-Apr-2008'
origin: 'JFK'
Using ticketMap and seatingMap together, you can find the name of the person who has reserved
seat 15B:
ticket = seatingMap('15B').ticketNum;
passenger = ticketMap(ticket)
passenger =
Sarah Latham
Map to Different Value Types
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