WP 34S x-hat bug


I'm running build 2562.

I enter a set of (x,y) points satisfying y = 2x + 1 (for example).

I then enter 7, execute y-hat (yellow-shift 6) and obtain 15 (correct).

If I then enter 15, execute y-hat (from the STAT menu) I obtain 0.142857... i.e., the reciprocal of the correct answer.

This problem seems to occur with any set of data, not just the set above. I have not checked any regression other than linear.

I am astonished at the sheer volume of work that you guys have been putting into this project, especially recently. Thank you all - and take care of yourselves!

Nigel (UK)


Yeah, a bug that crept in somewhere during the statistical rearrangements. Reciprocal is the fix.

Next build will have the fix included.

- Pauli

Possibly Related Threads...
Thread Author Replies Views Last Post
  [WP-34S] Unfortunate key damage with update to V3 :( svisvanatha 5 595 12-10-2013, 11:37 PM
Last Post: Les Bell
  WP-34S (Emulator Program Load/Save) Barry Mead 1 332 12-09-2013, 05:29 PM
Last Post: Marcus von Cube, Germany
  DIY HP 30b WP 34s serial flash/programming cable Richard Wahl 2 484 12-04-2013, 11:14 AM
Last Post: Barry Mead
  WP 34S/43 ?'s Richard Berler 3 445 11-10-2013, 02:27 AM
Last Post: Walter B
  My FrankenCulator (wp-34s) FORTIN Pascal 4 446 11-09-2013, 06:18 PM
Last Post: FORTIN Pascal
  WP 34S Owner's Handbook Walter B 5 617 11-09-2013, 05:34 PM
Last Post: Harald
  wp 34s overlay and programming. FORTIN Pascal 6 577 11-08-2013, 01:28 PM
Last Post: Nick_S
  m.dy in display of WP-34S Harold A Climer 3 358 11-05-2013, 11:28 AM
Last Post: Andrew Nikitin
  WP 34s : An old problem coming back Miguel Toro 2 336 11-05-2013, 03:00 AM
Last Post: Marcus von Cube, Germany
  [WP 34s] Pressure Conversion Factors Timothy Roche 8 673 11-04-2013, 07:17 PM
Last Post: Dave Shaffer (Arizona)

Forum Jump: