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25 lines
743 B
Matlab
25 lines
743 B
Matlab
function centroids = kMeansInitCentroids(X, K)
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%KMEANSINITCENTROIDS This function initializes K centroids that are to be
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%used in K-Means on the dataset X
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% centroids = KMEANSINITCENTROIDS(X, K) returns K initial centroids to be
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% used with the K-Means on the dataset X
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%
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% You should return this values correctly
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centroids = zeros(K, size(X, 2));
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% ====================== YOUR CODE HERE ======================
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% Instructions: You should set centroids to randomly chosen examples from
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% the dataset X
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%
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% Randomly reorder the indices of examples
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randidx = randperm(size(X, 1));
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% Take the first K examples as centroids
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centroids = X(randidx(1:K), :);
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% =============================================================
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end
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