Page Rank Algorithm , source code

Discussion in 'PHP' started by ved2210, Nov 17, 2009.

  1. #1
    Hi friends ,

    I am working on Page rank algorithm from last 1 month .
    I have to implement the page rank algorithm and have to develop
    the code for the algorithm . Basically i have the Num of INBOUND and the OUT BOUND LINKS for individual pages of a website . I have the list of pages which links to other pages of the website , i can say i have developed a crawler for that and now i am stuck up with the real implementation for the algorithm .

    Please geeks , need your help .

    Thanks ,
    Ved.
     
    ved2210, Nov 17, 2009 IP
  2. Kelly2

    Kelly2 Peon

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    #2
    I am pretty lost on exactly what it is you are asking for, it seems you want us to correct or finish your crawler script but at the same time have not posted the source code to the said script nor directed us to a link with said script for a "live" example.

    Sorry sir, but without further knowledge I, and most of these forum users, will not be able to help you.
     
    Kelly2, Nov 18, 2009 IP
  3. SmallPotatoes

    SmallPotatoes Peon

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    #3
    Step 1: Come up with an algorithm, describe it clearly
    Step 2: Implement that algorithm

    Which step are you having trouble with?
     
    SmallPotatoes, Nov 18, 2009 IP
  4. Kelly2

    Kelly2 Peon

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    #4
    From my understanding you have finished and perfected the algorithm, and if you made it from scratch you should have no problem implementing it.
     
    Kelly2, Nov 18, 2009 IP
  5. ved2210

    ved2210 Peon

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    #5
    Hi ,
    I have completed coding for my crawler .
    I have no problem with that .
    But i am having trouble how to start up implementing the
    page rank algorithm . Its very confusing for me , i am not that much expert coder and so i want your help there how and where to start up to implement
    page rank algorithm . I have the details like all the pages and inbound and out bound pages and their total number of the links of all individual pages .
    I have created kind of site map .

    I think first step would be to create the graph .

    I thought to implement it with matrix . But i am stuck for the conditions like ,

    Say There are pages A , B , C , D , E , F, G .

    In the worst situation all links to each other .
    Now its going to be recursive process .

    Because to find PR of A i need pr of rest of them , again to find PR of B i need PR of rest of them including A and so on .

    So i think this is my main confusion , how to crack this problem .

    Hope it helps . Thanks
    :)
     
    ved2210, Nov 18, 2009 IP
  6. wmtips

    wmtips Well-Known Member

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    #6
    Are you trying to implement Pagerank algo yourself :eek:

    About recursive calculation process: Google uses the iterative computation:
    Learn more here
     
    wmtips, Nov 18, 2009 IP
  7. ved2210

    ved2210 Peon

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    #7
    hi there ,
    from one of the forum i got the link
    http://kraeutler.net/vincent/essays/google%20page%20rank%20in%20python/#math

    Really detailed explanation !! Very useful .
    I think i will be able to understand at least !!!

    Thanks to all ,

    TC .:)
     
    ved2210, Nov 18, 2009 IP