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41963
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location Ann Arbor, MI
age 76
visits member for 1 year, 10 months
seen 44 mins 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.


Jun
13
revised How can I extract multiple spans from a list?
Moderate clean-up
Jun
13
revised How to use Button as a control in Manipulate
Disambiguated variable name
Jun
13
comment How to use Button as a control in Manipulate
@Nasser. I agree. I'll do an edit.
Jun
13
comment How to use Button as a control in Manipulate
@Nasser. They are not the same; they are in different scopes. Maybe bad naming, but I used the OP names.
Jun
13
revised How to use Button as a control in Manipulate
Moderate clean-up
Jun
13
revised How to use Button as a control in Manipulate
Improved formatting
Jun
13
revised How to use Button as a control in Manipulate
added 72 characters in body
Jun
13
revised Table with some editable cells
Removed extraneous variable definitions
Jun
13
answered How to use Button as a control in Manipulate
Jun
12
answered Table with some editable cells
Jun
12
revised Table with some editable cells
Minor clean-up
Jun
12
answered Tab between elements in a GUI layout
Jun
12
revised Tab between elements in a GUI layout
Moderate clean-up
Jun
12
revised Using Part rather than Extract
Moderate clean-up
Jun
12
reviewed Close In a Function, how to Ensure Code Runs Prior to an Abort
Jun
12
comment Solving a differential Equation
@Stoc. I think I should mention that it's not so much a matter of "need[ing] to get rid of the 0.5", but of replacing any approximate numbers with integers or rationals. Changing 0.5 to 1/2 would have worked just as well as multiplying by integer 2.
Jun
12
comment Solving a differential Equation
@Stoc. I don't know a way to instruct Mathematica to show how it gets its results in a step-by-step way. My understanding is that its methods are not much like the ones humans use and would be unreadable to us humans. I have heard that Wolfram|Alpha can produce step-by-step results, but have no personal experience with that.
Jun
12
revised Using a LocatorPane
Improved formatting
Jun
12
answered Solving a differential Equation
Jun
12
comment Using a LocatorPane
Using MatrixForm is probably not a good idea either. Try replacing it with Grid.