311 reputation
36
bio website newsfare.com
location Cherry Hill, NJ
age 63
visits member for 3 years, 1 month
seen Feb 27 at 0:25
Freelance software contractor, specializing in FileMaker Pro

Feb
23
comment Inconsistency in arithmetic on list elements
Simon Woods, thank you. I now see from the "closely related" answer, pointed out by Kuba, that you have thought about this and related issues at length. Apparently my mind is not properly wired for nested lists. In fact I spend far too much Mathematica time figuring out whether to write {2}, or maybe 2, or possibly 3 at the end of a Map or Apply construct.
Feb
23
comment Inconsistency in arithmetic on list elements
This comment was a mistake, and now I can't figure out how to delete it. I am sorry.
Feb
23
comment Inconsistency in arithmetic on list elements
I appreciate your taking the time to explain that. "... not well explained in the documentation." The documentation and help system definitely is improving, but it is still not a straightforward task to master this language.
Feb
23
comment Inconsistency in arithmetic on list elements
I would like to format my code, but I don't know where to find the instructions for doing so. Of course I see other people's formatting results, but I don't see how they are achieving them.
Feb
22
awarded  Yearling
Feb
22
revised Inconsistency in arithmetic on list elements
improve clarity
Feb
22
asked Inconsistency in arithmetic on list elements
Feb
13
answered Wolfram Workbench - Mathematica Development Alternatives
Feb
12
revised Can I get a symbol cross-reference of a Mathematica Notebook?
Expanded the title
Feb
12
asked Can I get a symbol cross-reference of a Mathematica Notebook?
Dec
12
comment $\LaTeX$ and Mathematica
Here we may observe two of the top experts in this community -- people who have each given crucial help to countless users, answering thousands of questions -- both musing on the possible influence of ImageSize and ImageResolution on the scale and granularity of printed output. Is it not ludicrous that Mathematica should still, after all these years, require undocumented tricks and incantations simply to print something at a definite size? Then to top it off: "May be it is different now." As usual, whoever knows such details is keeping mum.
Nov
19
comment A one line proof that one is zero using Mathematica 10
A computer algebra system might evaluate a user-entered expression, and then, if it thereby became idle, go back and check its work using some easy-to-hard ancillary methods such as looking for indeterminate expressions. Isn't that part of how a mathematician would avoid certain errors which in retrospect seem embarrassingly obvious? Such heuristic goal-seeking behavior might be compared with that of an optimizing compiler. The result would never be perfect -- but neither is the output of a mathematician.
Jan
22
comment What are the most common pitfalls awaiting new users?
I disagree with m_goldberg about avoiding "replacements for general documentation." Each of the many gaps in Mathematica's documentation leads directly to a pitfall. In that situation, a gap filled is a pitfall avoided.
May
15
awarded  Commentator
May
15
comment 3D orbits and inaccuracy over time
The mathematical difficulties of getting even approximate closed-forms solutions for n > 2 bodies are not related to what happens in a numerical calculation. The calculations bypass any consideration of theory. There can be numerical accuracy problems when two bodies get very close to each other, but in fact, numerical solutions can provide very high accuracy if done with the proper attention to details of the calculations. Navigation for satellites and spacecraft are, I believe, all performed numerically.
Mar
27
comment Why round to even integers?
The methods discussed are simple deterministic algorithms, which of course people like. Another method might involve randomizing the rounding of a 5. But I think bookkeepers would really hate the idea of random bank transactions.
Jan
30
comment What are the most common pitfalls awaiting new users?
By a long mile, my biggest problem as a beginner was the tendency of the Front End to work for a long time and then crash. I cannot tell you how much time this wasted, because then I usually had to quit the application from Activity Monitor. After I installed a modified version of a previously circulated quit-on-any-message handler, the problem mostly went away. That is why I strongly believe stop on message should be a default-on feature of the Mathematica Front End.
Nov
21
awarded  Necromancer
Aug
10
awarded  Necromancer
Aug
10
comment How to abort on any message generated?
Thank you verbeia! As you correctly surmised, I could not figure out how to get the code to look right.