16,668 reputation
41959
bio website none
location Ann Arbor, MI
age 76
visits member for 1 year, 9 months
seen 12 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.


13h
revised Intersection of lists of disjoint intervals
Moderate clean-up
13h
answered Controlling the placement of the y-axis
14h
comment Controlling the placement of the y-axis
We really need to know the form of the data you give to`ListPlot` takes. Is it {y1, y2, ..., yn} or is it {{x1, y1}, {x2, y2}, ..., {xn, yn}}?
14h
revised Controlling the placement of the y-axis
Made English more idiomatic.
1d
revised Why can NSolve only solve this system of equations after trivial substitution?
added 79 characters in body
1d
answered Why can NSolve only solve this system of equations after trivial substitution?
1d
revised Why can NSolve only solve this system of equations after trivial substitution?
Improved formatting
1d
comment Interpolation function rejected by ParametricPlot3D
I don't see how we can help you without seeing the code you used to build your interpolating function and the real plot code that failed. Posting code that worked and then giving a vague description about changes you made doesn't cut it.
1d
revised Interpolation function rejected by ParametricPlot3D
Moderate clean-up
1d
comment Interpolation function rejected by ParametricPlot3D
While you use the term Contourplot3D in your title and text, your code uses ParametricPlot3D , which is not the same thing.
1d
reviewed Close Substitution in Mathematica
1d
reviewed Close why head Association cannot be replaced by head List
1d
reviewed Close Solving a system of equations over a custom domain
1d
reviewed Leave Open Backslash commands in strings?
1d
comment Backslash commands in strings?
While this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference. Link-only answers can become invalid if the linked page changes.
1d
accepted Can't plot rotated region
1d
accepted Can't get Append to append a record (association) to a dataset
1d
revised How do I exclude the vertical line plotted at a discontinuity?
deleted 24 characters in body; edited title
1d
answered Which function definition is used to evaluate an expression that matches the lefthand side of more than one definition?
1d
revised Which function definition is used to evaluate an expression that matches the lefthand side of more than one definition?
Made title more descriptive of actual question. Minor clean-up