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If statement generates two outputs

Carl Witthoft 
>Date: Sun, 22 Mar 2009 22:58:49 +0100


 >just for fun, you could do this with multiassignment, e.g., using the 
 >(highly experimental and premature!) rvalues:

 >    source('http://miscell.googlecode.com/svn/rvalues/rvalues.r') 
 >if (TRUE)

 >       c(df1, df2) := list(4:8, 9:13)

 >    dput(df1)
 >    # 4:8
 >    dput(df2)
 >    # 9:13


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Now THAT's what I call an overloaded operator!   ^_^

But seriously:  can someone explain to me what's going on in the 
rvalues.r code?  I tried a simple experiment, replacing ":=" with a 
"colec" in the code, and of course the line

c(df1, df2) colec list(4:8, 9:13)


just gives me a "syntax error" response.   Clearly I need a pointer to 
some documentation about how the colon and equals sign get "special 
treatment somewhere inside R.

thanks
Carl

Thread (11 messages)

Carl Witthoft If statement generates two outputs Mar 23 Berwin A Turlach If statement generates two outputs Mar 23 Wacek Kusnierczyk If statement generates two outputs Mar 24 Wacek Kusnierczyk If statement generates two outputs Mar 24 Wacek Kusnierczyk If statement generates two outputs Mar 24 Romain Francois If statement generates two outputs Mar 24 Wacek Kusnierczyk If statement generates two outputs Mar 24 Thomas Lumley If statement generates two outputs Mar 24 Wacek Kusnierczyk If statement generates two outputs Mar 24 Thomas Lumley If statement generates two outputs Mar 24 Wacek Kusnierczyk If statement generates two outputs Mar 24