List all of the keys and values in ticketMap:
keys(ticketMap), values(ticketMap)
ans =
'2R175' '417R93' '947F4' 'A479GY' 'B7398' 'NZ1452'
ans =
'James Enright' 'Patricia Hughes' 'Susan Spera' 'Sarah Latham' 'Carl Haynes' 'Bradley Reid'
Build Map with Concatenation
You can add key/value pairs to a Map in groups using concatenation. The concatenation of
Map objects is different from other classes. Instead of building a vector of Map objects,
MATLAB returns a single Map containing the key/value pairs from each of the
contributing Map objects.
Rules for the concatenation of Map objects are:
- Only vertical vectors of Map objects are allowed. You cannot create an m-by-n array or
a horizontal vector of Map objects. For this reason, vertcat is supported for Map
objects, but not horzcat. - All keys in each Map being concatenated must be of the same class.
- You can combine Maps with different numbers of key/value pairs. The result is a single
Map object containing key/value pairs from each of the contributing Map objects:
tMap1 = containers.Map({'2R175', 'B7398', 'A479GY'}, ...
{'James Enright', 'Carl Haynes', 'Sarah Latham'});tMap2 = containers.Map({'417R93', 'NZ1452', '947F4'}, ...
{'Patricia Hughes', 'Bradley Reid', 'Susan Spera'});% Concatenate the two maps:
ticketMap = [tMap1; tMap2];The result of this concatenation is the same 6-element Map that was constructed in
the previous section:
ticketMap.Count
ans =
6
keys(ticketMap), values(ticketMap)Read and Write Using Key Index