18,789 reputation
41963
bio website none
location Ann Arbor, MI
age 76
visits member for 1 year, 10 months
seen 2 hours 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 the classical Greek synthetic form and in the more modern analytical form.


Aug
4
comment How to get a list of days from July 4th to Oct 4th over a range of years
OK, I misinterpreted the question. I'll fix the title.
Aug
4
revised How to extract only real solutions from the result of Solve
edited title
Aug
4
comment How to get a list of days from July 4th to Oct 4th over a range of years
@ubpdqn. I'm reading this as the entire summer after the 7/4 up to the current year. if current date of current year is after 4th but before the end of summer, it ends there, otherwise, to end of most recent summer.
Aug
4
comment How to get a list of days from July 4th to Oct 4th over a range of years
Does my most recent edit of the title characterize your question correctly?
Aug
4
revised How to get a list of days from July 4th to Oct 4th over a range of years
Minor clean-up
Aug
4
revised How to get a list of days from July 4th to Oct 4th over a range of years
Minor clean-up
Aug
4
comment How to get a list of days from July 4th to Oct 4th over a range of years
Some important things that you left out from your question: how do you want to results to be formatted and how do you plan to use them later?
Aug
4
reviewed Approve suggested edit on the winding number for the circle map (Arnold tongue)
Aug
4
answered What is the proper way to operate on interpolating functions?
Aug
4
revised How to select the text on the button?
added 2 characters in body
Aug
4
comment How to select the text on the button?
@Mr.Wizard. I'm aware of ButtonNote's use internally. I'm sure that's why your version of the code not only works now, but will continue to work. A portion of my intent in posting this addendum was to convey my feeling that Hyperlink is a just little screwed up.
Aug
4
reviewed Reviewed Making time-index dependent state-space models - where has the Kalman filter gone?
Aug
4
revised Making time-index dependent state-space models - where has the Kalman filter gone?
Moderate clean-up
Aug
4
reviewed No Action Needed Series expansion for $\frac{x}{1- \frac{1}{x}}$
Aug
4
comment How to draw a normalized tangent arrow
Your plot is distorted by the default aspect ratio of 1/GoldenRatio. Add AspectRatio -> Automatic to your plot options
Aug
4
revised How to draw a normalized tangent arrow
Improved formatting
Aug
4
answered How to select the text on the button?
Aug
4
revised What is the proper way to operate on interpolating functions?
added 48 characters in body
Aug
3
reviewed Close How to select the text on the button?
Aug
3
revised How to smoothly change the radius of a circle by dragging its circumference?
fixed a typo