Question

Best way to find relationship between two attributes in dataset

Answer 1

• Generally we find similarity between two instance(vactors) of dat sets. but I want to find similarity between two attributes.

• I.e. Correlation is one measure through which we can find that two attributes are dependent on eac other or not.

• I am doing attribute selection and in that i want to find attributes which are similar and then remove one of the attribute from two.

• So please provide me some measure like correlation

Answer 2

Suppose we have two Attributes X and Y, with means X' and Y' respectively and standard deviations S(X) and S(Y) respectively. The correlation is computed as summation from 1 to n of the product (X(i)-X'). (Y(i)-Y') and then dividing this summation by the product (n-1). S(X).