## Search found 67 matches

- Sat Feb 09, 2008 6:23 am
- Forum: Mathematics
- Topic: Half of a mortgage nomogram
- Replies:
**9** - Views:
**18108**

- Fri Feb 08, 2008 9:23 pm
- Forum: Mathematics
- Topic: Half of a mortgage nomogram
- Replies:
**9** - Views:
**18108**

How about if you would just fit coeffs for polynomials F1,F2,G2,F3 in function F1(a)=F2(n)+G2(n)*F3(i) such that error would be minimized for every combination of a,n,i in specified range ? This is of course the approach I already proposed. Indeed you could attempt to fit smooth curves. In many cas...

- Fri Feb 08, 2008 5:58 am
- Forum: General
- Topic: Spam, etc.
- Replies:
**9** - Views:
**36370**

- Fri Feb 08, 2008 2:42 am
- Forum: Mathematics
- Topic: Half of a mortgage nomogram
- Replies:
**9** - Views:
**18108**

### Re: Half of a mortgage nomogram

[quote="RonDoerfler"][quote="Glenbarnett"]I have made the right half of this equation into a nomogram (i.e. the tricky part), following largely the "one curvy scale" discussion I posted here recently. [/quote] I understand why you might expect the a and i scales to be l...

- Thu Feb 07, 2008 7:44 am
- Forum: General
- Topic: Spam, etc.
- Replies:
**9** - Views:
**36370**

- Thu Feb 07, 2008 6:05 am
- Forum: Mathematics
- Topic: Half of a mortgage nomogram
- Replies:
**9** - Views:
**18108**

### Half of a mortgage nomogram

The mortgage nomogram Leif was describing has two main parts. If P is the loan amount (P stands for Principal), m is the monthly payment, i is the monthly interest rate, and n is the term in months then P/m = a = [1-(1+i)^{-n}]/i Of course, the user wants the interest quoted as an annual rate and th...

- Wed Feb 06, 2008 8:07 am
- Forum: Mathematics
- Topic: Shared scales
- Replies:
**1** - Views:
**7056**

### Anamorphosis with back to back scales

The usual double-anamorphosis (due to Lafay) that is in the books is generally better than the simpler single anamorphosis - which can still be useful when all of the curves on the intersection chart are similarly curved. However, there is a situation in which adjusting a single scale is more useful...

- Tue Feb 05, 2008 3:35 am
- Forum: General
- Topic: Spam, etc.
- Replies:
**9** - Views:
**36370**

- Tue Feb 05, 2008 1:48 am
- Forum: Literature
- Topic: A recommended paper
- Replies:
**0** - Views:
**7831**

### A recommended paper

I was going through some of my old nomography stuff, and came across this one again - I've been looking for it lately, and I'm glad I found it, because it was better than I remembered. If you have access to it, I highly recommend Philip Lyle's paper (note only one L in the first name!): Philip Lyle ...

- Mon Feb 04, 2008 1:21 am
- Forum: General
- Topic: Spam, etc.
- Replies:
**9** - Views:
**36370**

Is it possible to do one of the following two: (i) have a CAPTCHA or something on signup, so bots cant sign themselves up? An easy one would be to answer a simple question about nomograms or something. There could always be an alternative route via email or something where you just explain why you n...

- Sun Feb 03, 2008 8:39 pm
- Forum: Mathematics
- Topic: Two straight scales with a weird curvy scale in the middle
- Replies:
**9** - Views:
**22691**

- Sun Feb 03, 2008 4:03 am
- Forum: Mathematics
- Topic: Two straight scales with a weird curvy scale in the middle
- Replies:
**9** - Views:
**22691**

- Sat Feb 02, 2008 10:41 pm
- Forum: Mathematics
- Topic: Two straight scales with a weird curvy scale in the middle
- Replies:
**9** - Views:
**22691**

- Sat Feb 02, 2008 5:05 am
- Forum: Mathematics
- Topic: Two straight scales with a weird curvy scale in the middle
- Replies:
**9** - Views:
**22691**

- Fri Feb 01, 2008 6:43 am
- Forum: Mathematics
- Topic: Two straight scales with a weird curvy scale in the middle
- Replies:
**9** - Views:
**22691**