Post Reply 
41C/CV root finders
05-28-2015, 11:27 AM (This post was last modified: 05-28-2015 11:28 AM by Ángel Martin.)
Post: #33
RE: 41C/CV root finders
(05-28-2015 09:59 AM)Dieter Wrote:  Here's another, very simple method:

Code:
i0 = 2 / n * (PV + n*PMT + FV) / (FV – PV)

The estimate is the same for BEGIN and END mode. Here the denominator only becomes zero if FV = PV, which does not make much sense anyway. ;-)

I'll try this one first - easier to fit in the current room available. Will report results when done.

I agree if FV = PV the user deserves to get an error message, ha!

As to why the accuracy isn't 13-digits in the result - I was trying to avoid instabilities in the Newton algorithm, which happen due to oscillations around the result. I probably went overboard since the code checks that the delta be less than 1 E-8 and not 1 E-10 - I just assumed that many decimal digits don't make much sense for the nature of the variable, the interest rate (where anything beyond 2 decimal digits will probably be frowned at).

ÁM
Find all posts by this user
Quote this message in a reply
Post Reply 


Messages In This Thread
41C/CV root finders - Dave Britten - 05-20-2015, 07:07 PM
RE: 41C/CV root finders - Thomas Klemm - 05-20-2015, 07:36 PM
RE: 41C/CV root finders - Dieter - 05-20-2015, 07:44 PM
RE: 41C/CV root finders - Dave Britten - 05-20-2015, 08:08 PM
RE: 41C/CV root finders - Massimo Gnerucci - 05-20-2015, 08:40 PM
RE: 41C/CV root finders - Dave Britten - 05-20-2015, 08:49 PM
RE: 41C/CV root finders - Didier Lachieze - 05-21-2015, 11:12 AM
RE: 41C/CV root finders - Dieter - 05-21-2015, 11:40 AM
RE: 41C/CV root finders - Dave Britten - 05-21-2015, 12:51 PM
RE: 41C/CV root finders - Dieter - 05-21-2015, 07:36 PM
RE: 41C/CV root finders - Dieter - 05-22-2015, 08:34 AM
RE: 41C/CV root finders - bshoring - 05-27-2015, 10:09 PM
RE: 41C/CV root finders - Dieter - 05-27-2015, 11:16 PM
RE: 41C/CV root finders - Ángel Martin - 05-28-2015, 06:19 AM
RE: 41C/CV root finders - Dieter - 05-28-2015, 08:42 AM
RE: 41C/CV root finders - bshoring - 05-28-2015, 09:37 PM
RE: 41C/CV root finders - Ángel Martin - 05-22-2015, 01:14 PM
RE: 41C/CV root finders - Dieter - 05-22-2015, 07:07 PM
RE: 41C/CV root finders - Dieter - 05-24-2015, 07:10 PM
RE: 41C/CV root finders - Ángel Martin - 05-25-2015, 05:35 AM
RE: 41C/CV root finders - Dieter - 05-25-2015, 07:19 PM
RE: 41C/CV root finders - Ángel Martin - 05-26-2015, 05:06 AM
RE: 41C/CV root finders - Dieter - 05-26-2015, 05:39 PM
RE: 41C/CV root finders - Ángel Martin - 05-26-2015, 09:26 PM
RE: 41C/CV root finders - Dieter - 05-26-2015, 10:08 PM
RE: 41C/CV root finders - rprosperi - 05-27-2015, 12:30 AM
RE: 41C/CV root finders - Dieter - 05-27-2015, 11:08 PM
RE: 41C/CV root finders - Ángel Martin - 05-28-2015, 05:44 AM
RE: 41C/CV root finders - Dieter - 05-28-2015, 09:50 PM
RE: 41C/CV root finders - Ángel Martin - 05-29-2015, 07:58 AM
RE: 41C/CV root finders - Ángel Martin - 05-27-2015, 05:17 AM
RE: 41C/CV root finders - Dieter - 05-27-2015, 01:50 PM
RE: 41C/CV root finders - Ángel Martin - 05-27-2015, 03:03 PM
RE: 41C/CV root finders - Dieter - 05-27-2015, 07:15 PM
RE: 41C/CV root finders - Dieter - 05-28-2015, 09:59 AM
RE: 41C/CV root finders - Ángel Martin - 05-28-2015 11:27 AM
RE: 41C/CV root finders - Ángel Martin - 05-28-2015, 01:54 PM
RE: 41C/CV root finders - Dieter - 05-28-2015, 06:33 PM
RE: 41C/CV root finders - Ángel Martin - 05-29-2015, 08:04 AM
RE: 41C/CV root finders - Ángel Martin - 05-29-2015, 05:54 PM
RE: 41C/CV root finders - Dieter - 05-29-2015, 06:15 PM
RE: 41C/CV root finders - Ángel Martin - 05-29-2015, 06:44 PM
RE: 41C/CV root finders - Dieter - 05-29-2015, 07:19 PM
RE: 41C/CV root finders - Dieter - 05-30-2015, 12:37 PM
RE: 41C/CV root finders - Ángel Martin - 05-30-2015, 02:04 PM
RE: 41C/CV root finders - Dieter - 05-29-2015, 08:00 PM



User(s) browsing this thread: 1 Guest(s)