Clustering algorithm Neural Networks

Clustering Analysis Concepts
(j) 4 clusters obtained by Jain et al. (1999) defined clustering analysis as the organization of a collection of patterns into clusters based on similarity. This definition is ambiguous, and clarity can be attained by defining clusters and similarity.

Definition of a Cluster

Jain and Dubes (1988) listed some cluster definitions, used for different application purposes:

  1. Focusing on minimizing intra-cluster distances, a cluster is a set of similar objects, and objects in different clusters should not be similar.
  2. Focusing on both minimizing intra-cluster distances while maximizing between-cluster distances, a cluster is a set of points which are aggregated in the testing environment such that the distance between two points in a cluster is less than the distance between the points of other clusters.
  3. Using a graph-representation and maximizing cluster density, clusters are densely connected regions in a multi-dimensional space separated by loosely connected points.
One may note that these definitions do not have mutually exclusive goals.


Two Features of Clustering Analysis

Cluster analysis is an unsupervised non-predictive classification

Source: Lex Javier

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Bank Rip-off Update from 60 days ago

2009-01-11 22:13:00 by seattlezoid

Summary: Opened acct with $5000 cash and a $30K Canadian Check (CAD). The bank employee looked up the exchange rate and used a stamp on the back of the check to show that the US dollar rate was $28K.I got a deposit slip showing that amount. 8 Days latter the bank calls me and has me fill out some forms to process this check. I fill out their forms and 25 days later they apply 22K to the acct instead of the 28K (yes the rate went down considerably in those 25 days) To make a long story shorter, the district Manager approved a 4K correction in my acct. But here is the question....I am still out about 1K from the amount I thought I was getting which was the exchange rate for the date of the original deposit of my check. I think I have a small claims against the amt they looked up and wrote...

West's resources benefit the whole country  — Victoria Times Colonist
It is true that resource exports put upward pressure on the Canadian exchange rate, but it is only one factor. We cannot escape global forces. If Canada is blessed with resource exports in the West that make up for the loss of jobs in the East, …

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