rproc-r-package

Using a contingency table as input for pROC Package

For pROC Package. I wonder how can I use a 2x2 contingency table (TP/TN/FP/FN) instead of predictor/response input.

Solution

  • You can't

    The ROC curve shows how sensitivity and specificity varies at every possible threshold. A contingency table has been calculated at a single threshold and information about other thresholds has been lost. Therefore you can't calculate the ROC curve from this summarized data.

    See this answer for more details on the reason why it is not possible.