Home Forums PATN and Pattern Analysis PATN Discussion Alocation Radius in ALOC

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  • #428

    my technical question is about the alocation radius in ALOC.

    Previously i thought i was able to set that before the analyses ran, but now it seems
    i can only choose the number of groups before i run it? is there a way i
    can calculate the ALOC radius after the analyses, and/or define it before i
    run the analyses?

    #508
    lee
    Keymaster

    Hi Mark

    The allocation radius does control the number of groups produced in the non-hierarchical classification in PATN.

    Experience suggested however that most people wanted to select the number of groups rather than having a stab at an allocation radius that would produce a reasonable number of groups. Most tended to manipulate the radius to get a desired number of groups.

    What PATN does is to use a branch and bound approach to manipulate the allocation radius to home in on the user-selected number of groups. In some cases, hitting this number is not possible.

    Is there any reason you want to work with the allocation radius directly?

    Lee

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