Department of Computer Science

Given the following dataset in Matlab, find the different classes and number of instances

0 votes	Given the following dataset in Matlab, Write a function in Matlab to find the different classes and number of instances per class: data=[ {'sunny'}; {'sunny'}; {'overcast'}; {'sunny'}; {'sunny'}; {'rain'}; {'sunny'}; {'rain'}; {'overcast'}; {'sunny'}; {'rain'}; {'rain'}; ]
	Asked on 11:12, Monday 18 Nov 2019 By Imed BOUCHRIKA In Apprentissage automatique II

Answers (1)

0 votes

1/ the function

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function [classes, instancesN] = findClasses(dataset)

m_map = containers.Map();

[rows, columns] = size(dataset);

for i=1:rows

if m_map.isKey(dataset{i,1})

m_map(dataset{i,1}) = m_map(dataset{i,1})+1;

else

m_map(dataset{i,1}) = 1;

end

classes = m_map.keys();

instancesN = m_map.values();

for k=1:length(classes)
     x = classes{k};
     i = num2str(instancesN{k});
     strcat("Class: '",x,"' has: ",i," instance(s)")
end

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Execution:

test