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Education > Math > Re: help with a...
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Re: help with acceleration and deceleration

by Bill <Bill@[EMAIL PROTECTED] > Jul 7, 2008 at 03:34 PM

Odysseus,

That is correct, I am after a Sigmoid shape. I didn't quite understand 
your function, what is curt? Can your function be modified so that it 
only accelerates at the intro or decelerates at the outro or both?


> I get the impression Bill is after a sigmoid shape: perhaps something 
> like
> 
> s = (9/20)(curt((t/5)-1) + 11/9)
> 
> would be a reasonable approximation -- although the steeply rising 
> ****tion in the middle may be more abrupt than desired. I believe a true 
> sigmoid involves hyperbolic trig functions or the like, but a curve 
> based on the inverse tangent function might also work. Anyway, the 
> function above yields the following table of values:
> 
> time  scale
>   0   0.100
>   1   0.132
>   2   0.170
>   3   0.218
>   4   0.287
>   5   0.550
>   6   0.813
>   7   0.882
>   8   0.930
>   9   0.968
>  10   1.000
>
 




 6 Posts in Topic:
help with acceleration and deceleration
Bill <Bill@[EMAIL PROT  2008-07-01 23:10:27 
Re: help with acceleration and deceleration
Bill <Bill@[EMAIL PROT  2008-07-02 16:02:30 
Re: help with acceleration and deceleration
Mensanator <mensanator  2008-07-02 16:27:53 
Re: help with acceleration and deceleration
Odysseus <odysseus1479  2008-07-04 06:16:59 
Re: help with acceleration and deceleration
Bill <Bill@[EMAIL PROT  2008-07-07 15:34:33 
Re: help with acceleration and deceleration
Odysseus <odysseus1479  2008-07-08 02:19:56 

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tan12V112 Sun Nov 23 3:31:09 CST 2008.