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Having the sensitivity and specificity values, what software do you recommend that enables drawing the ROC curve provided this data?

Thanks.

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As I wrote earlier, ROC requires confidence scores, not random FPR/FNR readings.

Nevertheless, I would recommend two R packages: ROCR for plotting (many options, very nice graphs) and colAUC from caTools for calculating AUROC (rocket fast).

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  • $\begingroup$ Thanks for your reply. How can I find the confidence score, provided as I mentioned that I have sensitivity and specificity values for different studies? Thanks $\endgroup$ – Simplicity Jul 30 '11 at 12:36
  • $\begingroup$ @SWEngineer Depends on the method you use; vote proportion in ensembles, distance from boundary in SVM-likes, proportion of classes in the neighborhood in kNN-likes, ... $\endgroup$ – mbq Jul 30 '11 at 12:45
  • $\begingroup$ What I have is a list of studies that used some sort of computer algorithm or computer aided diagnosis (CAD) system and measured the sensitivity and specificity. So, as you can imaging I JUST have values for those two variables for different studies, and trying to plot an ROC curve. Provided that, what should I do to get an ROC curve correct? Thanks $\endgroup$ – Simplicity Jul 30 '11 at 12:55
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    $\begingroup$ In this case there is no hope for ROC. You can at most plot them as points to compare with other ROC curves. $\endgroup$ – mbq Jul 30 '11 at 13:56
  • $\begingroup$ I will be having the following values in this case TP, FP, FN, and TN. Do you think this is sufficient. There is a software called Meta-DiSc that requires those values to draw a SROC curve. By the way, is there a difference between SROC and ROC? Thanks $\endgroup$ – Simplicity Jul 30 '11 at 14:02
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In addition to the previously mentioned packages, an other R package I would recommend to perform ROC Analysis and draw ROC curves is pROC. This package can perform multiclass AUC as defined by Hand and Till (2001).

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For MATLAB, there are some basic tools on my website here

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