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Re: Mathematica and Lisp

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  • Subject: [mg120040] Re: Mathematica and Lisp
  • From: "djmpark" <djmpark at>
  • Date: Wed, 6 Mar 2013 05:54:52 -0500 (EST)
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  • References: <kh4d3m$6vs$> <4997429.28227.1362539866570.JavaMail.root@m06>

Reverse the order of what? ArcTan of one argument has only one argument and
how can that be reversed? What has two arguments is the coordinate
specification {x, y} and they are not reversed in ArcTan[x, y].

It is the one argument form ArcTan[y/x] that seems poorly designed and would
probably only be used when one knows the quotient and not x and y - so there
wouldn't be anything to reverse.

David Park
djmpark at 

From: Richard Fateman [mailto:fateman at] 

 (simple example:  why does Mathematica reverse the order of arguments to
arctan of 2 args?)


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