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Dec
12
comment Piecewise smooth rectangle pulse
Hyperbolic tangents are useful for smooth step functions, e.g. Plot[0.5 (Tanh[10 (x - 1)] - Tanh[10 (x - 3)]), {x, 0, 4}]
Dec
9
comment How to conveniently stop a programme without aborting the computation
Do you mean to pause the calculation so that it can be resumed later? Have you seen this: reference.wolfram.com/language/tutorial/…
Dec
6
comment BUG: AssociationMap loses definition
I cannot reproduce this in v10.0.1 on Windows 7 (64-bit). Have you tried reinstalling Mathematica?
Dec
5
comment How to exclude the diagonal in a MatrixPlot?
@becko, it would help if you supplied an example matrix to demonstrate the problem
Nov
25
comment How do I draw a pair of buttocks?
@Ludwik, dammit I knew I should have paid attention in anatomy class!
Nov
25
comment How do I draw a pair of buttocks?
@Öskå, I agree, your butt is nicer than mine.
Nov
22
comment Regarding Evaluated True
This appears to be a bug. At some point during the plot creation (inside System`ProtoPlotDump`iPlot) the Filling option value is processed to generate a full filling description for each plotted curve. This process does not take into account the Evaluated option and so sees only a single expression in your second example, and therefore only creates a Filling specification for one curve. I suggest you submit a bug report to Wolfram.
Nov
22
comment Obtain polygons describing all intersections of many polygons
polygons[[9]] includes each perimeter point twice, so it is all hole.
Nov
21
comment Fit inside a module
As funnypony points out, you have simply missed a few semicolons at the end of lines. Voting to close as trivial mistake.
Nov
20
comment Minesweeper beta:How to Dynamic a lot of graphics with high-speed
Or ToExpression["a=" <> ToString[3]]
Nov
19
comment Upvalues and order of interpretation
@Kuba, I think this is more a question of evaluation control than pattern specificity. In QUAD["k1"]->2 OP needs QUAD["k1"] to partially evaluate to give an elementDefinition expression, but then for the elementDefinition SubValues not to evaluate - so that the UpValue definition kicks in instead when Rule evaluates. I'm not sure how this can be done. Personally I would steer clear of using built-ins like Rule as part of a homebrew syntax.
Nov
19
comment How do you apply an algorithm individually to an array with many graphs
Regarding your "obviously it doesn't like doing that" snippet: the outermost iterator should be given first. Like this: Table[stuff, {j, allgraphs}, {k, Max[VertexDegree[j]]}]
Nov
19
comment Maxwell propagator problem 2D
You probably want {ez, hy, hx} outside the Do loop so that it is returned from the module. Also I suggest you get the basic algorithm working before trying to compile it. And be aware of the difference between Dot and Times.
Nov
18
comment How to do algebra on summations of variable expressions?
@Mr.Wizard, I wonder if some of these Sum transformations are already built in, somewhere inside the colossal rule set for Simplify. But I agree wholeheartedly with your comment.
Nov
18
comment Comparison of Dispatch objects ureliable in Mathematica 10
@Szabolcs, in general rule order does matter though. Or is it different for Dispatch?
Nov
16
comment How to programmatically extract mathematical formulas from Word with Mathematica 9?
It looks like the WordprocessingDocument is this from the Open XML SDK. I had a quick look at it too, but I'm not at all familiar with .NET and it seemed too much like hard work for a Sunday distraction :-)
Nov
15
comment How can I Integrate large trigonometric expressions more efficiently?
No, please don't delete your original. I think it's good to keep it as it shows how you would approach similar problems in cases where the integrals aren't trivial.
Nov
15
comment How can I Integrate large trigonometric expressions more efficiently?
+1 Same approach I took, though since n is an integer I didn't bother with Integrate at all. Just Expand[2 Pi expr]/.{(Cos|Sin)[_]^2 -> 1/2, (Cos|Sin)[_] -> 0}
Nov
15
comment How can I Integrate large trigonometric expressions more efficiently?
What we need is an example of the original Integrate expression, not the result. And please add additional information to the question, not as comments. There is an "edit" button under the question for that purpose.
Nov
15
comment How to programmatically extract mathematical formulas from Word with Mathematica 9?
This answer includes some C# code for converting OMML to MathML. It might be some help.