[R] Data Package Query

Rolf Turner rolf.turner at xtra.co.nz
Fri Jun 28 00:29:21 CEST 2013

On 28/06/13 04:47, Jeff Newmiller wrote:

> A common error by beginners (which may or may not be your problem in this case) is to create a variable called "data". Unfortunately this hides the function named "data" and from that time forward that R session doesn't work when you type example code that uses the data function.


This is simply not true.  I believe it *used* to be true, sometime 
waaaaayyyy back,
but hasn't been true for years.  The R language is much cleverer now.  
If there
is a function "melvin()" somewhere on the search path and also a data object
"melvin" (earlier on the search path) then doing


will correctly call the function melvin() with no complaints.  The R 
"can tell" by the parentheses that you mean the *function* melvin and 
not the
data object "melvin".


     data <- 42
     Error: object 'akima' not found
     data(akima)  # No error message, nor nothin'!
     # The data set "akima" is displayed.

All that being said it is ***BAD PRACTICE***, just in terms of 
and avoiding confusion, to give a data set set the same name as a function
(either built in, or one of your own).


is relevant.


         Rolf Turner

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