# data mining

Question 1

Suppose that you are occupied as a facts mining consultant for an Internet exploration engine sodality. Describe how facts mining can aid the sodality by giving inequitable examples of how techniques, such as clustering, designation, fellowship administration mining, and irregularity overthrow can be applied.

Question 2

Question 3

Consider the XOR tenor where there are filthy grafting points: (1, 1, −),(1, 0, +),(0, 1, +),(0, 0, −). Transform the facts into the subjoined portion immeasurableness:

Φ = (1, √ 2x1, √ 2x2, √ 2x1x2, x2 1, x2 2).

Find the apex lip rectirectilinear determination boundary in the transformed immeasurableness.

Question 4

Consider the subjoined set of petitioner 3-itemsets: {1, 2, 3}, {1, 2, 6}, {1, 3, 4}, {2, 3, 4}, {2, 4, 5}, {3, 4, 6}, {4, 5, 6}

Construct a hash tree for the over petitioner 3-itemsets. Assume the tree uses a hash office where all odd-numbered aces are hashed to the left relative of a node, suitableness the even-numbered aces are hashed to the fair relative. A petitioner k-itemset is inserted into the tree by hashing on each successive ace in the petitioner and then subjoined the misspend relative of the tree according to the hash treasure. Once a leaf node is reached, the petitioner is inserted inveterate on one of the subjoined conditions:

Condition 1: If the profoundness of the leaf node is correspondent to k (the source is conducive to be at profoundness 0), then the petitioner is inserted carenear of the enumerate of acesets already stored at the node.

Condition 2: If the profoundness of the leaf node is near than k, then the petitioner can be inserted as desire as the enumerate of acesets stored at the node is near than maxsize. Assume maxsize = 2 for this investigation.

Condition 3: If the profoundness of the leaf node is near than k and the enumerate of acesets stored at the node is correspondent to maxsize, then the leaf node is converted into an interior node. New leaf nodes are created as relativeren of the old leaf node. Petitioner acesets previously stored in the old leaf node are select to the relativeren inveterate on their hash treasures. The new petitioner is also hashed to its misspend leaf node.

How abundant leaf nodes are there in the petitioner hash tree? How abundant interior nodes are there?

Consider a action that contains the subjoined aces: {1, 2, 3, 5, 6}. Using the hash tree contrived in dissect (a), which leaf nodes conciliate be checked opposite the action? What are the petitioner 3-itemsets contained in the action?

Question 5

Consider a assembly of documents that has been separated from a greatly larger set of distinct documents so that the separated documents are as inferior from one another as likely. If we ponder documents that are not extremely conjoined (connected, harmonious) to one another as being irregular, then all of the documents that we possess separated ability be classified as anomalies. Is it likely for a facts set to depend solely of irregular objects or is this an affront of the terminology?

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