[R] Non-visible functions are asterisked

From: Muenchen, Robert A (Bob) <muenchen_at_utk.edu>
Date: Sat, 08 Mar 2008 10:48:49 -0500

Dear R-Helpers,

I suspect I'm about to ask a FAQ, but I haven't been able to find an answer in the FAQ, AItR or an R Site Search. When I look at the methods of summary (below) it says, "Non-visible functions are asterisked". I looked at the help file for summary.princomp, which did not comment on it being non-visible. I ran its help file example, which printed visible output. I did not notice how it differed from other functions, like summary.data.frame that is not marked non-invisible. What does the non-visible mean?


> methods(summary)

 [1] summary.aov            summary.aovlist       
 [3] summary.connection     summary.data.frame    
 [5] summary.Date           summary.default       
 [7] summary.ecdf*          summary.factor        
 [9] summary.glm            summary.infl          

[11] summary.lm summary.loess*
[13] summary.manova summary.matrix
[15] summary.mlm summary.nls*
[17] summary.packageStatus* summary.POSIXct
[19] summary.POSIXlt summary.ppr*
[21] summary.prcomp* summary.princomp*
[23] summary.stepfun summary.stl*
[25] summary.table summary.tukeysmooth*

   Non-visible functions are asterisked

Bob Muenchen (pronounced Min'-chen),
Manager, Statistical Consulting Center
U of TN Office of Information Technology Stokely Management Center, Suite 200
916 Volunteer Blvd., Knoxville, TN 37996-0520 Voice: (865) 974-5230
FAX: (865) 974-4810
Email: muenchen_at_utk.edu
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