[R] Department of Redundancy Department.

[Rolf Turner]

I just noticed a certain ``usage'' in a recent posting, and couldn't
restrain my self from commenting.  The usage was of the form

	``if(X==TRUE)''

where X was a logical variable.

This sort of thing is brought to you by your Department of Redundancy
Department.  The ``==TRUE'' bit is irrelevant, incompetent, and  
immaterial,
as Perry Mason used to say.  The value of X==TRUE is exactly the same as
the value of X when X is a logical variable.  If X is not a logical  
variable
a lot of strange things can happen, depending on the nature of X.

It is safer and takes 6 fewer key strokes to use ``if(X)''.  So why not
do that, eh?

	cheers,

		Rolf Turner

P. S.  The example that triggered this post actually used ``if(X==T)''.
This is doubly dangerous since ``T'' can be overwritten.  If it was
overwritten you'd get toadally wrong answers.  E.g., suppose you had
set

	T <- FALSE   # !!!

***ALWAYS USE ``TRUE'' AND ``FALSE'' FOR LOGICAL VALUES.
    DO NOT USE ``T'' AND ``F''.***

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