[Octave-bug-tracker] [bug #34363] Poor performance for certain statistical distributions

[Lachlan Andrew]

Follow-up Comment #2, bug #34363 (project octave):

Update: The file  poissinv_newnew.m  is an improvement on  poissinv_new.m with
the following changes:
- For scalar  lambda,  it avoids the loop for small cases
- it is optimised for small lambda instead of large lambda, by doing the
explicit summation before doing the asymptotic approximation.

It is about twice as fast as poissinv_new.m when the answer is less than 20,
but slower when the answer is greater than 20 (but is still several orders of
magnitude faster than poissinv.m in that case).

Do we have any usage data to say whether small or large  lambda  is more
common?

Do we have any usage data to say which of these functions is used most often?

(file #34618)
    _______________________________________________________

Additional Item Attachment:

File name: poissinv_newnew.m              Size:6 KB


    _______________________________________________________

Reply to this item at:

  <http://savannah.gnu.org/bugs/?34363>

_______________________________________________
  Message sent via/by Savannah
  http://savannah.gnu.org/