## Correlation Matrix for clusters of geometrical points

I have two clusters of 2D points for which I wish to build a correlation matrix? What is the methodology for calculating the correlation between one point and another? I am not sure how to apply a correlation coefficient formula considering for each value in the data set I have two attributes.

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Nigel, a correlation matrix consists of a matrix with entries $a_{m,n}$ that are the correlation coefficient of variables $v_m$ and $v_n$. You might have to restate your question so that it makes some more sense. What is your definition of what a correlation matrix is and how to build one? Is this homework? If it is, please see the FAQ for better places to ask this question. If it isn't, you'll need to put more detail in and show what you've tried to do thus far. – sleepless in beantown Dec 19 2010 at 0:51