kMeansInitCentroids.m

function centroids = kMeansInitCentroids(X, K)
  
% initialize placeholder
centroids = zeros(K, size(X, 2));

% use randperm to shuffle the row indices of X
shuffle_X = randperm(size(X,1));

% only use the first K number of shuffled indices
first_K = shuffle_X(1:K, :);

for i=1:K
    centroids(i, :) = X(i, :);
end
  
end