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location Ann Arbor, MI
age 77
visits member for 2 years, 3 months
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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.


1d
comment DeleteMissing issues
If you turn off the suggestions bar after you encountered the problem, you will also have to quit and relaunch the kernel.
1d
comment DeleteMissing issues
I can reproduce your problem with DeleteMissing in V10.0.2 running on OS X. DeleteCases[a, _Missing] works fine.
1d
comment How to write the following subroutine in Mathematica and then how to call it?
This question appears to be off-topic because it is too localized; i.e, it applies only to the local situation and needs of its poster and answers will not benefit others.
1d
comment What's the name of the default font used in Mathematica 10?
Try choosing Show Fonts... from the Format menu. (The menu also shows the shortcut on OS X)
1d
comment What's the name of the default font used in Mathematica 10?
On OS X I find the font by putting the cursor into a cell and pressing Cmnd + T.
1d
comment How to prevent tiny complex errors in Integrate?
possible duplicate of Replace very small numbers by zero in the output of a list
1d
comment What's the name of the default font used in Mathematica 10?
I don't think you can trust $DefaultFont‌​; it's been obsolete for a long time.
2d
comment How to put a fixed sized frame around traditional form expression
You are more likely to get an answer if you were to edit your post to include code that could serve as a minimal working example of your problem. As it is currently posted you have not given sufficient context for me (and many others who might want to help you) to work on your problem.
Jan
26
comment How to use a list of rules as a data set
@Jinxed. Your answer was fine even before you edited it. I don't think anyone would have been confused by the difference in identifier; but I apologize for not paying more attention to your answer and using models.
Jan
25
comment Permanently rounding numbers/values to a given number of significant figures
I down voted because of the ranting. Now that it's gone, I removed my down vote.
Jan
25
comment Permanently rounding numbers/values to a given number of significant figures
Have you looked at NumberForm?
Jan
25
comment Permanently rounding numbers/values to a given number of significant figures
In my opinion your question would be much improved if you were to edit out the ranting and just present the numerics problem you want to address.
Jan
24
comment ParametricPlot3D plot n functions
It seems to me that there might be a problem with using {n-1, n+1} as the range of the plot along the y-axis. Should this perhaps not be {0, n+1}?
Jan
23
comment Good sources of programming exercises for learning Mathematica programming?
Follow this link to find out how get David Wagner's book as a free download.
Jan
22
comment How to use Mathlink mprep
This question appears to be off-topic because it is not about Mathematica or any of the other Wolfram Research software for which questions are accepted on this site.
Jan
21
comment Finding the pixel positions for the straight line joining two points
Do you want a list of the discrete pixels needed to draw the line segment?
Jan
21
comment Finding the pixel positions for the straight line joining two points
I think the OP wants a list of the discrete pixels needed to draw the line segment. If I'm right, this doesn't quite do the job.
Jan
21
comment How can I make an linear breakdown chart similar to those seen on iCloud?
@M.R. Adding labels to the larger segments is bit tricky or at least fussy. I know of no simple way to get the bounding box of displayed text in Mathematica. That is this the main reason that I did put that feature in my answer.
Jan
21
comment How can I make an linear breakdown chart similar to those seen on iCloud?
@bobthechemist. Whether or not it's easier is a matter of opinion. I did say "or almost so" :) The look of the tooltip including the drop shadow is OS X standard, except for the background color which was changed with a tooltip option.
Jan
19
comment How to display grids in separate cells?
I'm guessing the OP wants each grid in individual cells.