TPQ as a query

[Kita Chaves Damasio Macario]

Dear all,

I have already used TPQ as a prior info but I was now trying to evaluate the likelihood of a phase or sequence being before or after a specific calendar year (not saying that it is). Would you know any examples where I could find this code?

Thanks for your help

Kita

[Erik Marsh]

Hi Kita, I think you're looking for the query Order (and maybe Difference).

You can use them to compare a calendar year (as a Date) with another event in your model. Order will give your likelihoods that one was before the other.

I would normally recommend comparing a boundary from a phase or a sequence.

If you post your code here then it will easier for the forum to make suggestions.

Hope this helps. –Erik

[Kita Chaves Damasio Macario]

Dear Erik, Thanks for helping.

The code for using it as a prior would be, for example:

 Plot()
 {
  Outlier_Model("General",T(5),U(0,4),"t");
  Sequence("test after as a prior")
  {
   Boundary("start 1");
   After("prior")
   {
    C_Date("1370AD",1370,0);
    Outlier("", 0.05);
   };
   Phase("")
   {
    R_Date("test550_40", 550, 40)
    {
     Outlier("", 0.05);
    };
    R_Date("test500_40", 500, 40)
    {
     Outlier("", 0.05);
    };
    R_Date("test520_40", 520, 40)
    {
     Outlier("", 0.05);
    };
   };
   Boundary("end 1");
  };
 };

What forces the results to be After 1370AD, right?

What I would like to have instead is the likelihood for the Phase being after 1370AD. Can I have this using the After command in a different manner?

Thanks again.

Kita

[Seren Griffiths]

Hi Kita

I'd probably do something like this, which should give you the probability that each result occurred after your calendar age. 

(NB I wrote the below on the train longhand, so also check it works generally) :)

Hope that helps.

All the best

s

Plot()
 {
  Sequence("")
  {

    C_Date("1370AD",1370,0);

    Phase("")
   {
    R_Date("test550_40", 550, 40)
    {

     Outlier("");

    };
    R_Date("test500_40", 500, 40)
    {

     Outlier("");

    };
    R_Date("test520_40", 520, 40)
    {

     Outlier("");
    };
   };
  };
 };

---

From: ox...@googlegroups.com <ox...@googlegroups.com> on behalf of Kita Chaves Damasio Macario <kitam...@id.uff.br>
Sent: 13 September 2024 13:38
To: OxCal <ox...@googlegroups.com>
Subject: Re: TPQ as a query

 

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[Kita Chaves Damasio Macario]

Dear Serene,

Thank you for your help.

I guess this also includes the calendar age as part of the data, so makes the Phase after 1370AD. I was looking for something that would return the likelihood for the Phase being after that year, but not using it as a prior information. I will keep trying. Thanks.

Kita

[Bayliss, Alex]

Hi Kita,

 

Does this do what you want? The probability that start 1 is after AD 1370 is 70%, and that end 1 is after AD 1370 is 98%. Therefore, the probability that the whole phase (i.e. both the start and the end) is after AD 1370 is 69%.

 

Best wishes,

 

Alex

 

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Plot()

{

  Outlier_Model("General",T(5),U(0,4),"t");

  Sequence("test after as a prior")

  {

   Boundary("start 1");

   Phase("")

   {

    R_Date("test550_40", 550, 40)

    {

     Outlier("", 0.05);

    };

    R_Date("test500_40", 500, 40)

    {

     Outlier("", 0.05);

    };

    R_Date("test520_40", 520, 40)

    {

     Outlier("", 0.05);

    };

   };

   Boundary("end 1");

  };

  Order("AD 1370")

  {

   C_Date("AD 1370", 1370, 0.25);

   Date("=start 1");

   Date("=end 1");

  };

};

 

From: ox...@googlegroups.com ox...@googlegroups.com On Behalf Of Kita Chaves Damasio Macario
Sent: 14 September 2024 07:22
To: OxCal <ox...@googlegroups.com>
Subject: Re: TPQ as a query

 

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[Kita Chaves Damasio Macario]

Thank you Alex.

This gives me what I need.

This is also what Erik suggested, now I see.

Thanks Alex, Eric and Seren for helping me :)

All the best

Kita

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