The TkListView function in the TeachingDemos package is an interactive tool for looking at the structure and contents of lists and other objects.
-- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare greg.s...@imail.org 801.408.8111 > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r- > project.org] On Behalf Of Timothy Wu > Sent: Thursday, May 27, 2010 3:14 AM > To: r-help@r-project.org > Subject: [R] Methods to explore R data structures > > Hi, > > I'm very confused about R structures and the methods to go with them. > I'm > using R for microarray analysis with Bioconductors. Suppose without > reading > the documentations, what's the best way to explore a data structure > when you > know nothing about it? > > I am currently using is() / class() to see what the object is. str() / > attributes() to probe inside the object, and > someth...@something$something > to walk it and explore. Is there any other way? Also, without reading > documentations, is there a way to know what functions are available to > extract data from it? For example, there is sampleNames() which works > on > ExpressionSet and AnnotatedDataFrame (which is a part of > ExpressionSet). How > do I know they are available (as sometimes I can't recall where I've > seen > them and I forgot the function names). And what are R functions? Are > those > two separate functions or polymorphic functions? I'm also pretty > confused > about S3, S4, or the regular list. I guess I'm fairly confused about R > in > general. > > Any good source of reading (hopefully short and understandable, too) > would > be appreciated. Thanks. > > Timothy > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. ______________________________________________ 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.
