The Math Forum

Search All of the Math Forum:

Views expressed in these public forums are not endorsed by NCTM or The Math Forum.

Math Forum » Discussions » sci.math.* » sci.math

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

Topic: Time complexity, for finding all permutations from 1 to n
Replies: 3   Last Post: Jun 20, 2013 5:30 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]

Posts: 1,448
Registered: 4/7/12
Re: Time complexity, for finding all permutations from 1 to n
Posted: Jun 20, 2013 5:05 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

On 19 Juni, 14:14, wrote:
> Den onsdagen den 19:e juni 2013 kl. 11:24:28 UTC+2 skrev

> > I guess it is some 0(n)+x comparrisons, a linear algorithm using comparssons?
> > I think i have a linear algorithm that will do it without comparissons and doubles in linear time just a single swap for each new permutation table.
> > A setup table is needed to calculate sizes factorials and respective swap within.
> > Is this a known algorithm? Once the table created the algorithm run in linear swap time. The factorial table is used to find the size of the swaps.
> > There is no copies of tables within the linear swap, no doubles.
> Could someone give me a link pseudo code for the most effective known algorithm?

Here is Dirk Van der Mortels attempt not that impressive hangs up at 9
digits, of course there is much better ways. But the framework seem
ok, so maybe i can use it to compare algorithms.
How is permutations algorithm used generally, is it in gaming
industri, or is there other applications for shuffle algorithms?

I did read a post here about someone who needed it for statistical
analyse of datasamples, but i never understood what he was after,
don't you sort the samples to make statistical analyse?

I was thinking doing a webpage comparing various algorithms for
writing permutations, so if you can write some javascript code or
pseudo code can you post it here.

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© The Math Forum at NCTM 1994-2018. All Rights Reserved.