Dieter Menne <dieter.me...@menne-biomed.de> wrote >Technically a good point, but I found it helpful for starters who want to >avoid the inferno of "what's attached now?" not to use it at all. >My suggestion is to use with() instead because it has a higher locality. > >I know, many of the examples use attach.
As a beginner, I find this whole issue very hard to grapple with. When to use attach with $ syntax data = or load I have seen many books and manuals say to just avoid using "attach" at all, but several of these then go on to use "attach" quite often. But I run into conceptual problems with all these methods, particularly when I am trying to operate on subsets of a data frame, and then sometimes need to use the [ and ] syntax, sometimes subset = within a function, and sometimes create a separate data frame to then use (but here attach can cause tons of problems). Do other beginners share my confusion? Can some expert point a path through this confusion? thanks Peter PS As a beginner, I appreciate the time that several posters are now taking to elucidate things that may seem obvious. Peter L. Flom, PhD Statistical Consultant www DOT peterflomconsulting DOT com ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
