# Using container map to get values and to draw histogram

19 views (last 30 days)
Ntombikayise Bhengu on 12 Oct 2020 at 16:44
Answered: Puru Kathuria on 23 Oct 2020 at 15:39
M =
Map with properties:
Count: 100
KeyType: char
ValueType: double
mean(valueSet)
ans =
1.3911e+07
I have the above container map. Howdo I get values of
+ Histogram
+ Most common letter of first name
+ Average number of letters in first name (integer)

#### 1 Comment

Ntombikayise Bhengu on 12 Oct 2020 at 16:54
I did the histogram using the followig code:
bar(valueSet)
got this drawing:

Puru Kathuria on 23 Oct 2020 at 15:39
Hi,
I understand that you are storing your data in containers.Map and want to plot it as a bar graph.
Below is the code snippet that explains how to plot bar graphs on Maps and also shows how to query the most occuring key in the data.
I hope you can relate the below demonstration to your requirements
%Plotting bar graph
keysData = {'a', 'b', 'c', 'e', 'g'}; valuesData = [1,3,4,5,8];
map = containers.Map(keysData,valuesData);
bar(cell2mat(map.values));
k = keys(map);
set(gca, 'XTick', 1:length(k));
set(gca, 'XTickLabel', k);
%Finding most occuring character
keySet = cell2mat(map.keys);
maxFrequency = 0;
maxKey = '';
for i = 1:numel(keySet)
iThValue = map(keySet(i));
if iThValue >= maxFrequency
maxFrequency = iThValue;
maxKey = keySet(i);
end
end
maxKey
maxFrequency

R2020a

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