auc drop absolutearea

[thorwb]

under the function auc, for the option absolutearea; in addition to true or false, would it be possible to have a third option (eg NULL) of not including negative values in the calculation of area under curve? ie only summing the positive area

The point would be to simplify calculating areas over/under thresholds.

[ekstroem]

I'll think about what the best solution would be. In the meantime you can calculate the area of the positive values by computing the average of the full area and the normal AUC:

(MESS::auc(x, y, absolutearea = TRUE) + MESS::auc(x, y))/2