Added anticoagulant where it had been unknown. Added column for which lab sample came from. Added unique identifier: SampleID. Removed replicates. Made one data.frame with ALL the data (Meta.all).
Changed the main data.frame to be Meta.all and then Meta is only the data.frame where there were no problems. Added column to Meta.all for Problem.data. Saved all important data.frames as RData object for importing into other scripts and as Excel file.