I just pushed pROC 1.6.0.1 to the CRAN, as version 1.6 was breaking the vignette of the Causata package with sanity checks (thanks Kurt Hornick for the report). Those tests appeared to be too stringent in some cases (matrix inputs to roc() are working OK), and yet appeared not to catch all possible errors by testing for vector predictors and responses, which can let some mistakes pass (for instance list inputs).

The erroneous checks were removed. Please keep in mind that pROC is designed to take atomic vectors as predictor and response inputs. Future versions of pROC may not accept other inputs as they currently do, however this will be announced in advance.

The new version is already available on the CRAN. To update, type update.packages() or install.packages("pROC") if you want to update pROC only.