Using gnus-summary-number-of-articles-in-thread

Using gnus-summary-number-of-articles-in-thread

[Sten Drescher]

	I'm attempting to create the function
gnus-thread-sort-by-average-score (to deal with those threads that
rocket to the top of the total-score sort because the couple of articles
I read ballooned into a monster thread of 50 kazillon postings) as follows:

(defun gnus-thread-sort-by-average-score (h1 h2)
  "Sort threads by the average of all scores in the thread.
Unscored articles will be counted as having a score of zero."
  (>
   ( / (gnus-thread-total-score h1)
       (gnus-summary-number-of-articles-in-thread h1))
   ( / (gnus-thread-total-score h2)
       (gnus-summary-number-of-articles-in-thread h2))))

	Problem is, while gnus-thread-total-score returns the score,
gnus-summary-number-of-articles-in-thread is returning zero!  What am I
doing wrong here?

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Re: Using gnus-summary-number-of-articles-in-thread

[Per Abrahamsen]

You could also use

	gnus-thread-sort-by-total-score

and then set 

	gnus-thread-score-function

to some function taking the average.

E.g:

(defun arithmetic-average (&rest numbers)
  (/ (apply '+ numbers) (length numbers)))

(setq gnus-thread-score-function 'arithmetic-average)

Re: Using gnus-summary-number-of-articles-in-thread

[Sten Drescher]

Per Abrahamsen <abraham@dina.kvl.dk> said:

PA> You could also use

PA> 	gnus-thread-sort-by-total-score

PA> and then set

PA> 	gnus-thread-score-function

PA> to some function taking the average.

E.g>

PA> (defun arithmetic-average (&rest numbers)
PA>   (/ (apply '+ numbers) (length numbers)))

PA> (setq gnus-thread-score-function 'arithmetic-average)

	That won't work, because arithmetic-average won't get passed the
entire list of scores, but the score of the parent and its sub-threads:

---
gnus-thread-score-function's value is +

Documentation:
*Function used for calculating the total score of a thread.

The function is called with the scores of the article and each
subthread and should then return the score of the thread.
---

	This means that if there is a subthread of 20 articles averaging
5 (total 100), a subthread of 2 articles averaging 50 (100), and a
parent of 100, arithmetic-average would return 32 instead of 13.

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