1gsubfn-chron read in zoo data with chron datetimes. 2gsubfn-cut Use strapply to extract endpoints from cut labels. 3gsubfn-gries Stefan Gries' Linguistics code. 4gsubfn-lower Makes all letters in words lower case except first. 5gsubfn-si Replace SI scale letter with number. 6gsubfn-unitTests Run gsubfn unit test suite. 7