2.2.2. Computing the ranking

The ranking of variable is used in many methods that are focusing more on monotony than on linearity (this is discussed throughout this documentation when coping with regression, correlation matrix, c.f. for instance The monotone case). The way this is done in Uranie is the following: for every variable considered, a new variable is created, whose name is constructed as the name of the considered variable with the prefix “Rk_”. The ranking consists in assigning to each variable entry an integer, that goes from 1 to the number of patterns, following an order relation (in Uranie it is chosen so that 1 is the smallest value and \(N\) is the largest one).