How to iterate and access over map key values

55 次查看（过去 30 天）
Tabassum
Tabassum 2023-7-11
回答： Diwakar Diwakar 2023-7-11
I have a map with some keys which has multiple number of values in it How can I access those values for each key.
these show the size of the array of the value but not the values itself.
for u = keys(mp)
mu = values(mp,u);
disp(mu)
for v = mu
disp(v);
end
disp('-----------ended------------------')
end

请先登录，再回答此问题。

回答（2 个）

Chunru
Chunru 2023-7-11
Ran in:
mp = dictionary(["a1", "a2", "a3"], {1, [2 3], "str"})
mp =
dictionary (string ⟼ cell) with 3 entries: "a1" ⟼ {[1]} "a2" ⟼ {[2 3]} "a3" ⟼ {["str"]}
k = keys(mp);
v = values(mp)
v = 3×1 cell array
{[ 1]} {[ 2 3]} {["str"]}
for i = 1:length(v)
disp(v(i));
end
{[1]} {[2 3]} {["str"]}
Diwakar Diwakar
Diwakar Diwakar 2023-7-11
Ran in:
Check the below code may be help you.
% Create and populate the map
mp = containers.Map;
mp('key1') = [1, 2, 3];
mp('key2') = {'value1', 'value2', 'value3'};
mp('key3') = [10, 20, 30, 40];
% Iterate over each key in the map
for u = keys(mp)
key = u{1}; % Extract the key from the cell array
% Access the values associated with the current key
valuesArray = mp(key);
% Iterate over each value in the values array
for i = 1:numel(valuesArray)
value = valuesArray(i);
disp(value);
end
disp('-----------ended------------------')
end
1 2 3
-----------ended------------------
{'value1'} {'value2'} {'value3'}
-----------ended------------------
10 20 30 40
-----------ended------------------

类别

在 Help Center 和 File Exchange 中查找有关 Logical 的更多信息

标签

产品


版本

R2023a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by