RE: [Groff] couple of questions regarding pic

[Ted Harding]

On 18-Aug-00 Ted Harding wrote:
> instead of
> 
> pi = atan2(0,1)
> 
> since for some reason
> this returns the result 0:
> 
> sprintf("%6.4f",pi) -> 0.0000

NOTE: the atan2 function in pic (like in awk) is

  atan2(y,x)

and NOT

  atan2(x,y)

which is why atan2(0,1) = 0, atan2(1,0) = pi/2 and atan2(0,-1) = pi.

Ted.



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Date: 18-Aug-00                                       Time: 14:15:25
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