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size (Map) - size of containers.Map object

Syntax

d = size(M)
d = size(M, dim)
[d1, d2, ..., dn] = size(M)

Description

d = size(M) returns the number of key-value pairs in dimensions 1 and 2 of map M. Output d is a two-element row vector [n,1], where n is the number of key-value pairs.

d = size(M, dim) returns the number of key-value pairs if dim is 1, and otherwise returns 1.

[d1, d2, ..., dn] = size(M) returns [n, 1, ..., 1] where n is the number of key-value pairs in map M.

Read more about Map Containers in the MATLAB Programming Fundamentals documentation.

Examples

Create a Map object containing the names of several US states and the capital city of each:

US_Capitals = containers.Map( ...
{'Arizona', 'Nebraska', 'Nevada', 'New York', ...
 'Georgia', 'Alaska', 'Vermont', 'Oregon'}, ...
{'Phoenix', 'Lincoln', 'Carson City', 'Albany', ...
 'Atlanta', 'Juneau', 'Montpelier', 'Salem'})

Get the dimensions of the Map object array:

size(US_Capitals)
ans =
     8     1

Use the map to find the capital of one of these states:

state = 'Georgia';
sprintf('   The capital of %s is %s', ...
        state, US_Capitals(state))
ans =
   The capital of Georgia is Atlanta

See Also

containers.Map, keys(Map), values(Map), length(Map), isKey(Map), remove(Map), handle

size

size (serial)

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