pROC version 1.19.0 was just released and will be available on CRAN very soon.

Besides minor changes and fixes in the coords and ci.coords functions, the main updates in this version focus on the core of the package, aiming to make it more modern, efficient, and easier to maintain. Several features that were difficult to maintain have been deprecated.

• The dependency on the retired plyr package has been removed (thanks to Michael Chirico for his contributions). Unfortunately, as a side effect, progress bars and parallel processing have been removed. Trying to set the progress and parallel arguments will now trigger a warning, and the arguments will be ignored.
• As a followup from the changes to the output of the coords function in version 1.16.0, the transpose, as.list, as.matrix and drop arguments have been deprecated. The coords function currently has multiple exit points, depending on arguments and inputs, and can return retults in mutliple formats. This makes it difficult to use and to maintain. Going forward, coords will only retrun data in a single, tidy data.frame format, compatible following modern R coding practices. For compatibility reasons, deprecated arguments are still available, but setting them to non default values will trigger warnings. They will be removed in a future release. If your code still uses these arguments, please update it accordingly.
• Finally, following years of performance improvements, an in an effort to simplify the codebase, all ROC computation algorithms other than 2 have been removed as they no longer provided meaningful performance advantages. The algorithm argument to roc has been deprecated. Setting it to a non-default value has no effect and triggers a warning. The fun.sesp value of roc objects is also deprecated. Calling it triggers a warning. Both will be removed in a future release of pROC.

Here is the full changelog:

• ci.coords can now take the same input values as coords (issue #90)
• ci.coords can be plotted
• Added "lr_pos" and "lr_neg" to coords (issue #102)
• coords with partial.auc now interpolates bounds when needed
• Added ignore.partial.auc argument to coords
• Deprecated transpose, as.list, as.matrix and drop in coords
• Deprecated the algorithm argument to roc and fun.sesp value
• Deprecated the progress and parallel argument for bootstrap operations.
• Removed dependencies on doParallel and retired package plyr (thanks to Michael Chirico, pr #134, #135, #136, #137, #138, #139 and #140).

You can update your installation by simply typing:

install.packages("pROC")

Update: pROC 1.19.0 was rejected from CRAN. A patch revision 1.19.0.1 was created to workaround an issue with a reverse dependency but provides no meaningful change:

• Move fun.sesp definition to work around LudvigOlsen/cvms#44.