[yt-users] Point Pairs in the Two Point Function

[Stephen Skory]

Hi Piyanat,

If memory serves (and it might not!),

1. The first point in each pair is chosen randomly within the volume.
The second point is chosen by picking a random-ish distance away
(within limits) from the first point, and the 3D angle is randomly
chosen on a sphere (so all angles are equally likely).

2. I'm not sure I understand this question. The algorithm should not
chose point pairs with distances greater than the size of your volume
(periodicity considered). Can you rephrase your question?

Sorry I can't be more specific, but yt isn't part of my job anymore! :(



On Mon, Sep 15, 2014 at 3:02 PM, Piyanat Kittiwisit
<piyanat.kittiwisit at asu.edu> wrote:
> Hello,
>
> I have some questions regarding the two point function in yt-2.6.
>
> 1) If my volume is a generic data on a rectangular grid, would the random point pairs be on a regular grid, or would they be truly random on a spherical grid an interpolated/averaged from the nearest neighborhoods on a rectangular grid?
>
> 2) If the former is true in 1), does it meant that you have to pick total_values that will not exceed the number of point pairs within your distance?
>
> -Piyanat
>
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Stephen Skory
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