Data Science. TileDB. Open Source. Quant Research. R. C++. Debian. Linux. Adjunct Clinical Professor, University of Illinois. Lots of coffee. And some running.
_If_ you trial numbers are indeed unique, make it a factor and retrieve the factor levels.
Or use @Rdatatable which does that for you via grouping and access to the group index.
#rstats
How It Started How It's Going
Less Is More: #rstats testing edition.
Yesterday's post at dirk.eddelbuettel.com/blog/ has more on "less is more", and a vignette engine example.