fn_R2RV

The function calculates a robust version of the coefficient of determination R2RV using the equation Summary values fitted with the robustbase::nlrob() function.

Usage

fn_R2RV(eq)

Arguments

eq

Summary of the equation fitted

Value

R2RV The robust version of the coefficient of determination.

Details

This is the consistency corrected robust coefficient of determination by Renaud and Victoria-Feser (2010) which allows for a possible correction factor **a** for consistency considerations.

Inside the function:

The vectors of observed (**y1**), predicted (**yc**) and weighted (**W**) values are obtained from the summary model (**eq**).

The value of the Weighted Estimate Average (**ywea**), the modified sum of squares for explained (**SSEw**), total (**SSTw**), and residual (**SSRw**) were estimated.

The correction factor value for consistency considerations a for 95 percent was also obtained from summary model (eq).

A vector with the robust version of the coefficient of determination **R2wa** and its adjusted value **R2wa_adj** were returned as a vector.

Examples

    if (FALSE) {
      R2wa <- fn_R2RV(eq)
    }