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| bio | website | jpl.nasa.gov |
|---|---|---|
| location | Pasadena, CA | |
| age | 46 | |
| visits | member for | 1 year, 4 months |
| seen | 11 hours ago | |
| stats | profile views | 190 |
I survived the seven minutes of terror.
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Apr 23 |
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Why is PhaseMargins going nuts? Use a real number (instead of exact numbers) in your transfer function (e.g., 10-->10.). |
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Apr 21 |
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Sqrt — how to get negative branch? But Solve[9==x^2,x] returns both solutions, so I don't think there's an inconsistency. |
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Apr 20 |
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Quantity and Trig functions I'm afraid that doesn't work, @Spawn1701D. |
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Apr 20 |
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Quantity and Trig functions @Spawn1701D: How would I use N? |
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Apr 20 |
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Quantity and Trig functions @J.M.: That's certainly faster--more than an order of magnitude in my quick check. |
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Apr 19 |
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Built-in unit strings recognized by Quantity? Good question! I hope Wolfram notices this question and intends to make the Quantity capability stand alone (I often use compound units and almost always run into this issue). |
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Apr 15 |
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How can I speed up numerical integration of multidimensional integral? One thing you could try is turning off symbolic preprocessing. I think you do this by including "SymbolicProcessing"->0 in the Method argument. I've found that symbolic preprocessing can be extremely time consuming if the integrand is complicated or algorithmic (rather than a formula). |
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Apr 15 |
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How do I display a histogram with normalized counts? I'm afraid I don't understand what you mean by "dwarfed"? That said, I'm not a statistician, so even if I understood your question, I probably couldn't provide you with a satisfactory answer. |
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Mar 13 |
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How to integrate a multivariate normal in Mathematica? Try using NIntegrate instead of Nintegrate. |
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Feb 27 |
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GPU user experiences My 3+ year old MacPro desktop with ATI Radeon HD 4870 runs your code in 0.077 sec. My 2012 MacBook Air with Intel HD Graphics 4000 runs it in 0.110 sec. Both are running MMA 9. |
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Feb 7 |
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Why does Mathematica struggle with solving this equation? Seems like a good idea. |
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Feb 7 |
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Why does Mathematica struggle with solving this equation? @OleksandrR.: Actually, I see your point. I suppose I was incorrectly expecting the same answer as NSolve provides, but the message from Reduce is pretty clear. |
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Feb 7 |
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Why does Mathematica struggle with solving this equation? I think Reduce is close to giving you the correct answer because -16.9154*-0.405465=6.85862, but for some reason it can't get rid of the complex value (0+2PiI). I would report this to Wolfram as a bug. |
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Feb 5 |
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How do I make a 3DPlot using cylindrical coordinates? @whuber: Of course you're right. I didn't read the question too carefully. |
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Feb 5 |
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How do I make a 3DPlot using cylindrical coordinates? Have you tried RevolutionPlot3D? |
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Feb 5 |
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What does # mean in Mathematica? You may find the Mathematica Documentation Center helpful for questions like this (you can just type # in the search field at the top and it will direct you to an explanation). In any case, here's a web version of the documentation: reference.wolfram.com/mathematica/ref/Slot.html |
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Feb 3 |
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Strange behaviour of OutputResponse @EdMendes: FYI, I've noticed you're fairly new to this forum and that you haven't "accepted" any answers to your questions. If you receive useful answers to your questions, you should vote them up. If you receive an answer which truly satisfies your question, you should "accept" it. |
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Feb 3 |
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Documentation searches hang frequently: Anyone else dealing with this? FYI, I cannot reproduce this behavior on MMA v9.0.1 under Mac OS X. |
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Feb 3 |
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Strange behaviour of OutputResponse I'm also running v9.0.1 on Mac OS X and I get the same results you describe when I run your example on MMA v8. Without spending too much time on this, it looks to me like MMA produces equivalent but different symbolic results under 8 and 9, and the differences become important when you apply Chop. For that reason (and many others), you should exercise caution when "Chopping". I generally only use Chop when I'm trying to display numbers in a "clean" manner, but never in the midst of a calculation. |
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Jan 31 |
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Incomplete implementation of units? @geraldcecil: It looks like the example you listed now works in MMA 9.0.1 |
