       Re: Sorting complex points

• To: mathgroup at smc.vnet.net
• Subject: [mg55886] Re: Sorting complex points
• From: Marcus Stollsteimer <marcus314 at yahoo.com>
• Date: Sat, 9 Apr 2005 03:55:22 -0400 (EDT)
• Organization: Comp.Center (RUS), U of Stuttgart, FRG
• References: <d356km\$ovn\$1@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

```OT wrote:

> I'm trying to sort lists of random complex points on the unit circle
> using their angles as criterion to sort them: I mean, if
> z=Cos[a]+I*Sin[a] and w=Cos[b]+I*Sin[b]( 0<=a,b<2*Pi ),
> I want z<w if a<b;
>
> how can i do that?

Hi, try

MyArg[x_] := Mod[Arg[x], 2 Pi]

list={0.625162 + 0.835834 I,0.502244 + 0.43736 I}

sortedlist = Sort[list, MyArg[#1] < MyArg[#2] &]

Regards,
Marcus

--
Kant was right: The mind imposes order.
It also tells you how much to tip. -- W. Allen

```

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