how to access the number of each sample after clustering ?

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fred bnm 2016-6-12

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https://ww2.mathworks.cn/matlabcentral/answers/289506-how-to-access-the-number-of-each-sample-after-clustering

编辑： Image Analyst 2016-6-12

i have 100 sample with 5 attribute for each of them.how to clustering this 100 sample in 3 cluster? i want to plot data and access the number of each sample after clustering.

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Answer 1

Image Analyst 2016-6-12

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https://ww2.mathworks.cn/matlabcentral/answers/289506-how-to-access-the-number-of-each-sample-after-clustering#answer_225270

编辑：Image Analyst 2016-6-12

在 MATLAB Online 中打开

Use the kmeans() function in the Statistics and Machine Learning Toolbox:

numberOfClasses = 3;
assignedClasses = kmeans(yourData100by5, numberOfClasses);
% Find out which rows are assigned to class #1:
class1Rows = assignedClasses  == 1;
% Extract only those observations
class1data = yourData100by5(class1Rows, :); % A 5 column matrix.
% Find out which rows are assigned to class #2:
class2Rows = assignedClasses  == 2;
% Extract only those observations
class2data = yourData100by5(class2Rows, :); % A 5 column matrix.
% Find out which rows are assigned to class #3:
class3Rows = assignedClasses  == 3;
% Extract only those observations
class3data = yourData100by5(class3Rows, :); % A 5 column matrix.