Undocumented functions (was: [R] Dates on Graphics)

[Emmanuel Paradis]

At 19:48 07/06/00 +0200, Friedrich Leisch wrote:
>>>>>> On Wed, 7 Jun 2000 09:41:23 -0700 (PDT),
>>>>>> Thomas Lumley (TL) wrote:
>
>
>TL> Some of this can be done with apropos(), but I don't think you can
keyword
>TL> search from inside R. It would be nice.
>
>
>help.search() might do what you want ...
>
>.f

Yes, but help.search() looks in the documented functions, whereas Yves's
concern was about the functions which are not documented. apropos() is fine
apparently, providing the corresponding library is loaded:

> apropos("date")
[1] "date"            "update"          "update.default"  "update.formula" 
[5] "update.packages"
> library(date)
> apropos("date")
 [1] "Math.date"          "Ops.date"           "Summary.date"      
 [4] "[.date"             "[[.date"            "as.character.date" 
 [7] "as.data.frame.date" "as.date"            "as.vector.date"    
[10] "date.ddmmmyy"       "date.mdy"           "date.mmddyy"       
[13] "date.mmddyyyy"      "is.date"            "is.na.date"        
[16] "mdy.date"           "plot.date"          "print.date"        
[19] "summary.date"       "date"               "update"            
[22] "update.default"     "update.formula"     "update.packages"   
> ?plot.date
Error in help(plot.date) : No documentation for `plot.date'

Hence, plot.date() is effectively here but not documented. AFAIK, the only
solution to know how to use the function is to open the file
RHOME/library/date/R, and search for:

plot.date <- function(x, y, ..., xaxt, xlab, ylab) {


Emmanuel Paradis
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