Search found 27 matches

by RonDoerfler
Fri Sep 07, 2012 6:55 am
Forum: Mathematics
Topic: Req: Can this eqn be expressed in Std Nomo Form?
Replies: 22
Views: 29529

Re: Req: Can this eqn be expressed in Std Nomo Form?

Thanks, Jason. Feel free to ask any questions about the article or anything else. I'm surprised we haven't communicated about nomograms before this! I have not had much luck transforming the earlier nomogram into one without seriously skewed grids, particularly for the ranges that Jason provided. An...
by RonDoerfler
Wed Sep 05, 2012 3:58 pm
Forum: Mathematics
Topic: Req: Can this eqn be expressed in Std Nomo Form?
Replies: 22
Views: 29529

Re: Req: Can this eqn be expressed in Std Nomo Form?

Hi Jason, It was a real puzzler to me as well when I first encountered a collapsed grid like this, and since then I've spent a long time trying to manipulate determinants to uncollapse them. It's a problem that seems to be hardly mentioned in references. I haven't read of introducing a second grid t...
by RonDoerfler
Wed Sep 05, 2012 7:50 am
Forum: Mathematics
Topic: Req: Can this eqn be expressed in Std Nomo Form?
Replies: 22
Views: 29529

Re: Req: Can this eqn be expressed in Std Nomo Form?

Jason has done the Saint-Robert Criterion to show that the terms in u and w can’t be expressed as a nomogram of three rectilinear scales—thanks! There is a similar but more laborious test to see if it can be expressed as a nomogram with two rectilinear scales and one curved scale (see pages 125-126 ...
by RonDoerfler
Thu Aug 16, 2012 7:21 pm
Forum: PyNomo
Topic: Doubts and equation "problems"
Replies: 1
Views: 4632

Re: Doubts and equation "problems"

Hi Ana, The more complicated circular nomogram for Bayes' Theorem that you reference was actually designed by Leif Roschier (the PyNomo author and host of this forum), Joe Marasco and myself. To create a simpler Type 1 nomogram of three parallel scales like the original 1975 Fagan Nomogram for Bayes...
by RonDoerfler
Tue Feb 16, 2010 5:50 am
Forum: Literature
Topic: Trouble finding an algorithm
Replies: 9
Views: 14001

Re: Trouble finding an algorithm

Hi Glen, Here are the Golitschek and Cheney articles. Unfortunately, it appears that Cheney defaults back to the Diliberto-Straus case here, too. http://www.myreckonings.com/Temp/Golitschek.doc http://www.myreckonings.com/Temp/Cheney.pdf If you'd still like the de Boor book excerpt, just let me know...
by RonDoerfler
Thu Feb 11, 2010 5:23 am
Forum: Literature
Topic: Trouble finding an algorithm
Replies: 9
Views: 14001

Re: Trouble finding an algorithm

Hi Glen, The 1984 book, "Anniversary Volume on Approximation Theory and Functional Analysis" is available in a few university libraries around here (i.e., Chicago). If no one else has provided the article to you by this weekend, I can stop by one of those libraries on Saturday, copy the vo...
by RonDoerfler
Sat Feb 06, 2010 4:50 am
Forum: Mathematics
Topic: Any other ways to do z^2 = x^2 + y^2 ??
Replies: 4
Views: 9347

Re: Any other ways to do z^2 = x^2 + y^2 ??

Hi Glen, As another example that uses dividers or a compass (or marking a radius on a sheet of paper) rather than a straightedge, see the nomogram on the last page (marked page 101) of the 3 pages I scanned into this Word document: http://www.myreckonings.com/Temp/HypotenuseNomogram.doc This excerpt...
by RonDoerfler
Sat Feb 06, 2010 3:59 am
Forum: Literature
Topic: 2010 Graphical Computing Calendar
Replies: 1
Views: 5258

2010 Graphical Computing Calendar

Hi All, I guess I should mention that last month I posted a 2010 calendar on graphical computing on my blog at: http://myreckonings.com/wordpress/2009/12/31/a-2010-graphical-computing-calendar/ It is available as a PDF for downloading and printing. The months April through December feature nomograms...
by RonDoerfler
Sat Aug 01, 2009 5:56 am
Forum: PyNomo
Topic: PyNomo 0.2.1 released
Replies: 5
Views: 8537

Re: PyNomo 0.2.1 released

Hi All, I've written an essay on using PyNomo that includes the features of the new 0.2.1 release. The description and a link to the PDF file can be found at http://myreckonings.com/wordpress/2009/07/31/creating-nomograms-with-the-pynomo-software/ . Many thanks to Leif for his help in reviewing draf...
by RonDoerfler
Tue Nov 11, 2008 2:29 am
Forum: PyNomo
Topic: Using PyNomo
Replies: 6
Views: 9532

Re: Using PyNomo

Hi Leif, In fact, with business travel and other unavoidable diversions I have not made any unique nomograms yet with the new version of your software. My plan is to first recreate a few of the most fascinating examples I've found in books in order to learn the software better. I did spend some time...
by RonDoerfler
Wed Oct 15, 2008 9:24 pm
Forum: PyNomo
Topic: PyNomo 0.2.0b0 released
Replies: 7
Views: 10197

Re: PyNomo 0.2.0b0 released

Wow, wonderful job, Leif! I've just browsed through the links and sublinks on your updated site and I'm amazed at all your beautiful examples. I've used Pynomo before to create nomograms, but never for the variety of compound nomograms that you describe on your site. I'm really impressed with the ca...
by RonDoerfler
Tue Jul 22, 2008 2:47 pm
Forum: General
Topic: Wargame nomogram site updated
Replies: 8
Views: 15483

Re: Wargame nomogram site updated

Well, we overlap a lot and we differ some. At one point I refer readers to webpages on your site for more information on some topics. The field of nomography is surprisingly large, and it's one subject that serves as a clear counter-example to people who think you can find everything on the Internet...
by RonDoerfler
Mon Jul 21, 2008 8:07 pm
Forum: General
Topic: Wargame nomogram site updated
Replies: 8
Views: 15483

Re: Wargame nomogram site updated

Thanks for the links to my blog--I appreciate it. When I was first exploring this subject I found your Project Rho site, Leif's Pynomo site, Barbecue Joe's site, and little else, so it was these sites that really got me interested in nomography. I've been busy the last few months working on an unrel...
by RonDoerfler
Sat Apr 05, 2008 4:46 pm
Forum: Software
Topic: Software for Stationary Scales
Replies: 9
Views: 31702

Re: Software for Stationary Scales

I had downloaded nomo_axis.py separately and put it in the same directory when I was trying different things to get it to work, so that's probably why it worked for me.

Thanks, Leif.

Ron
by RonDoerfler
Fri Apr 04, 2008 3:28 am
Forum: Software
Topic: Software for Stationary Scales
Replies: 9
Views: 31702

Re: Software for Stationary Scales

I had the same problem as pheon, but after I re-installed Pynomo (via the Windows executable) everything worked fine. It looks great--thanks, Leif!

Ron

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