20,756 reputation
42568
bio website none
location Ann Arbor, MI
age 76
visits member for 2 years
seen 1 hour ago

I am a retired software developer. I retired at the end of 2003 and since then my computer programming activities have been for recreational purposes. I find Mathematica excellent for that.

I started using Mathematica in 1997 (Ver. 3). I am currently using Ver. 9. Although I have used Mathematica for all kinds of stuff, I use it mostly to pursue my long standing interest in Euclidean geometry, both in its classical Greek synthetic form and in its more modern analytical/transformational form.


Aug
22
comment How can I get the function of a plotted trajectory?
This question has received three reasonable answers based on different interpretations of what is being asked. The OP has not indicated that any of these interpretations are helpful to him; therefore, I have voted to close this question as "not clear what you are asking".
Aug
22
awarded  programming
Aug
22
revised FullSimplify giving unexpected result
edited title
Aug
22
comment FullSimplify giving unexpected result
This is not an answer, but an extended comment. I would agree that it is too long to post any other way, but I think it needs a statement at the beginning warning readers looking for an answer, that it is only an extended comment.
Aug
22
revised Automatically add appropriate prefix to Quantity
Improved formatting
Aug
22
revised Map of United States as a 3D histogram
deleted 19 characters in body; edited title
Aug
22
comment Map of United States as a 3D histogram
Could you revise your answer to orient the USA correctly?
Aug
22
revised How can I get the function of a plotted trajectory?
added 2 characters in body
Aug
22
comment How can I get the function of a plotted trajectory?
I have edited my answer to clarify the point I want to make.
Aug
22
revised How can I get the function of a plotted trajectory?
inserted code for 2nd plot
Aug
21
revised How can I get the function of a plotted trajectory?
clarification
Aug
21
comment How can I get the function of a plotted trajectory?
This isn't about the path graph. I only show it to provide visual confirmation that f is the expected path function and, therefore, the approximate function you are seeking.
Aug
21
answered How can I get the function of a plotted trajectory?
Aug
21
revised How can I get the function of a plotted trajectory?
Made English more idiomatic
Aug
21
comment Is it possible to add page break in front-end?
It is also available on the left-click contextual menu.
Aug
21
reviewed Close The i-th element of a permutation
Aug
21
comment How to combine one or more rotated graphics objects?
@Rojo. Yes, but it's rather the long way around the barn (as we say in the US), don't you think. This post is to make sure beginners see the way it normally done when they read this questions and its answers.
Aug
21
revised How to tell NDSolve about known relations of the exact solution
Improved formatting
Aug
21
revised Convex hull of a large data set of 3D points
Made English clearer and more idiomatic
Aug
20
comment Why isn't Lookup treated like other symbols?
Let us continue this discussion in chat.