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#1 2011-10-14 16:06:08

JonathanS
Member
Registered: 2011-10-14
Posts: 2

Comination Algorithm, Order Matters, Souce Code

Hello, I visited mathsisfun.com/combinatorics/combinations-permutations-calculator.html and would like to get the source code for the combination where order matters and no repeats.

The one that is n!/(n-r)!

I would be using it for a program I am making that outputs all possible tetrahedral molecules.

Thanks!

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#2 2011-10-14 20:32:17

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 89,002

Re: Comination Algorithm, Order Matters, Souce Code

Hi JonathanS;

There is some confusion here.

like to get the source code for the combination where order matters and no repeats.

When order matters it is called a permutation.


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

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#3 2011-10-14 22:48:17

JonathanS
Member
Registered: 2011-10-14
Posts: 2

Re: Comination Algorithm, Order Matters, Souce Code

ah k, got to google some algorithms for permutations, thanks!

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#4 2011-10-15 00:15:02

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 89,002

Re: Comination Algorithm, Order Matters, Souce Code

Hi JonathanS;

You should be able to find many of them.


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

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