GetDeltaParams: Calculate Delta related parameters function
In toni-1991/Delta: Measure of Agreement Between Two Raters

This function perform all needed calculations to get all Delta related parameters. For do the exact calculations some variables previously calculated are needed.

1	GetDeltaParams(mx, Delta, Pi, k)

`mx`	Matrix. Agreement contingency table to perform calculations
`Delta`	Vector. Each element indicate the probability of recognize an element i.
`Pi`	Vector. Each element indicate the probability of classify at random an element in category i.
`k`	Integer. Dimension of the problem.

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GetDeltaParams(mx = matrix(c(60,0,3,2,50,1,3,2,79),3,3), 
			Delta = c( 0.8945724, 0.9522836, 0.8962094), 
              Pi = c( 0.2703707, 0.1939561, 0.5356732), k = 3)