以下函数将输入k（所需簇的数量），项目和最大迭代次数作为输入，并返回均值和簇。的项的分类存储在数组属于关联和项目的群集中的号被存储在clusterSizes。

def CalculateMeans(k,items,maxIterations=100000):

# Find the minima and maxima for columns

cMin, cMax = FindColMinMax(items);

# Initialize means at random points

means = InitializeMeans(items,k,cMin,cMax);

# Initialize clusters, the array to hold

# the number of items in a class

clusterSizes= [0 for i in range(len(means))];

# An array to hold the cluster an item is in

belongsTo = [0 for i in range(len(items))];

# Calculate means

for e in range(maxIterations):

# If no change of cluster occurs, halt

noChange = True;

for i in range(len(items)):

item = items[i];

# Classify item into a cluster and update the

# corresponding means.

index = Classify(means,item);

clusterSizes[index] += 1;

cSize = clusterSizes[index];

means[index] = UpdateMean(cSize,means[index],item);

# Item changed cluster

if(index != belongsTo[i]):

noChange = False;

belongsTo[i] = index;

# Nothing changed, return

if (noChange):

break;

return means;