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visits member for 2 years, 6 months
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Jan
19
revised Label area on plot
added 61 characters in body
Jan
19
answered Label area on plot
Jan
19
comment Complex Region using Presentations Package
I don't have the package (heard only good things about it!) but from looking at your syntax my guess would be: the first argument in ComplexRegionDraw[Exp[z]... has to be a boolean condition, not a complex function. Therefore, you should replace that by Abs[Exp[z]]<1, or Re[Exp[z]]>0, or some condition along those lines.
Jan
18
awarded  Nice Answer
Jan
18
answered Making data persistent, as in xmgrace
Jan
18
comment Label area on plot
Related question: Scale Insetted Characters to Plot
Jan
18
revised Representation of product with exclusions
typo
Jan
18
revised Representation of product with exclusions
Resolution of graphics was bad (Retina display doesn't work with notebooks)
Jan
18
answered Representation of product with exclusions
Jan
18
comment How to systematically classify Mathematica expressions?
I would claim that you cannot learn anything about Mathematica expressions from that book. I own the hard copy because my kids like the patterns.
Jan
17
comment Rayleigh Criterion
+1 for trying to answer a moving-target question.
Jan
17
revised How to save a GraphicsRow output?
Added extend selection
Jan
17
answered How to save a GraphicsRow output?
Jan
17
comment How to study asymptotic behavior, built-in functions
Closely related question: How to expand a function into a power series with negative powers?
Jan
17
answered Why does Simplify ignore an assumption?
Jan
17
comment Ways to compute inner products of tensors
@Artes I think I'd like it better if autocomplete choices only appeared after pressing a certain special key (like Tab), not immediately while in the middle of a word. I find that intrusive.
Jan
17
comment Why does Simplify ignore an assumption?
It's something I've seen posted before, but can't find. It has to do with the fact that Simplify seems to have a preference for alphabetical order in sums. So you can get the expected result by replacing a with any symbol that lexically comes after x and y. For example, use Simplify[x + y, x + y == xPlusY] or just Simplify[x + y,x + y==z]. It probably tries substitutions not in all permutations but only in alphabetical order when sums are involved.
Jan
17
answered Which ray-tracing software is compatible with Graphics3D?
Jan
16
comment Which ray-tracing software is compatible with Graphics3D?
I'll try to give a stepwise account later today, but it will obviously end up being more a Blender tutorial and I can't do it right now (only have a laptop, no 3-button mouse at the moment...).
Jan
16
comment Which ray-tracing software is compatible with Graphics3D?
Ah yes, you're right, the material is white - I thought I had deleted some light sources and saw the colors still there, but I actually had only hidden the lamps in the editor, not cut them from the scene... So yes, x3d gets pretty close to a faithful export format.