Add option to loop through multiple waveforms when running benchmarking

[briangow]

This update gives the option to run the benchmarking code ( #12 ) on multiple waveforms. It also updates the input arguments to set the help option and indicate which arguments are required when running against a single waveform versus running against multiple waveforms. An upcoming PR will print out the filename being run.

[tompollard]

It would be cleaner just to allow the input to be an individual file OR a folder. Does it need to be more complicated than this?

[briangow]

@tompollard , I was planning to allow a benchmarking run which pulls files from multiple PhysioNet databases. Having said that, it would be more efficient to simply download the files and they could be placed into a single folder, so that might not be necessary.

[briangow]

@tompollard , I decided to stick with the design that I had because I also need to run benchmarking across multiple file formats. This will be much easier to automate with a control file.

[tompollard]

@tompollard , I decided to stick with the design that I had because I also need to run benchmarking across multiple file formats. This will be much easier to automate with a control file.

Up to you, and I know you are working to a tight timeline. I think it makes the package unnecessarily fiddly! It isn't clear to me why having to pass a CSV as an argument is easier than just pointing to a folder of well-organised files. If it is necessary to specify details beyond those captured in the files, then these details could be captured in a metadata file in the folder.