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MathGroup Archive 2007

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Re: Slots & Ampersands

  • To: mathgroup at smc.vnet.net
  • Subject: [mg74366] Re: [mg74359] Slots & Ampersands
  • From: Bob Hanlon <hanlonr at cox.net>
  • Date: Mon, 19 Mar 2007 21:50:56 -0500 (EST)
  • Reply-to: hanlonr at cox.net

The slot is not present because the function output is intended to be independent of the input. In this case the function returns Red for any input. 

The function equivalent to 

f[x_]:=2 

is 

2&


Bob Hanlon

---- Mr Ajit Sen <senra99 at yahoo.co.uk> wrote: 
>   Dear MathGroup,
> 
>  I've always regarded the Slot and Ampersand as being
>  inseparable in Mathematica (the Laurel & Hardy of 
>  Mathematica?), and was surprised to find one of them absent
> in
> 
>    Plot[Sin[x], {x, 0, 2Pi}, ColorOutput -> 
>       (RGBColor[1, 0, 0]&)]
> 
>  [Help Browser under ColorOutput::colpc ,Examples]
> 
>   Question 1
> 
>   Where is Laurel gone? Is he inside ColorOutput or
>   RGBColor?
> 
>   Question 2
> 
>   Are there other similar constructs in Mathematica? [No # ]
> 
>   Thanks for your help.
> 
>   Ajit Sen.
> 
> 
> 
> 
> 		
> ___________________________________________________________ 
> To help you stay safe and secure online, we've developed the all new Yahoo! Security Centre. http://uk.security.yahoo.com
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