meta user
network profile
| bio | website | quantdec.com |
|---|---|---|
| location | ||
| age | ||
| visits | member for | 1 year, 4 months |
| seen | 1 hour ago | |
| stats | profile views | 897 |
Consultant (environmental stats a specialty) and teacher.
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May 10 |
reviewed | No Action Needed Exporting twice crashes Mathematica on Ubuntu 12.04 with Unity |
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May 10 |
reviewed | Reviewed How can I get even steps on x and y axes in a plot? |
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May 10 |
reviewed | Reviewed integral of inverse distribution function |
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May 9 |
reviewed | Leave Open How do I implement Dynamic Graphics? |
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May 9 |
reviewed | Close How to plot two functions together? |
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May 9 |
comment |
best fraction algorithm This sounds like a pure algorithmic/math question. Did you really intend to ask it on a Mathematica site? If so, please clarify how you expect to use Mathematica for the solution. |
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May 9 |
reviewed | Leave Open Simulating Queueing Disciplines in Mathematica |
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May 8 |
comment |
Evaluation of a triple sum does not finish in reasonable time Chris, my answer is incorrect: please accept the second answer by @b.gatessucks. |
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May 8 |
comment |
Evaluation of a triple sum does not finish in reasonable time Very nice idea! @Michael E2 has clearly identified my mistake, which now squares our two results. (I promised only to find a lower bound for the sum, so a numerical value of the integral around $3.5$ is just fine). I apologize for making you work so hard :-) and will make up for it by transferring all the points from my answer to yours, which deserves it. (There's a day's wait before I can do that, though...) |
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May 8 |
awarded | Nice Answer |
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May 8 |
comment |
How to compare power towers in Mathematica? @halirutan Nobody is responsible for deleting incorrect answers: signaling such problems is the role of downvotes. (On other sites, including math.SE, misunderstandings over this issue have created great amounts of angst among some people who have mistakenly accused moderators of not doing their jobs and have disparaged the communities. Please let's not foster such misunderstanding here.) |
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May 8 |
reviewed | Reviewed Improving speed of Exp[] |
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May 7 |
comment |
Finding max, min, and closest root of two dimensional data You overlooked this, which may be more useful to you. |
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May 7 |
comment |
Multiplying two dimensional data by a constant +1. Multiplying by a diagonal matrix is fast for up to somewhere between $100$ and $1000$ columns; beyond that, a solution modeled after Transpose[{1, 2} * Transpose[a]] becomes superior. Even better for such large matrices is a . SparseArray[Band[{1, 1}] -> {1,2}]; this is superior to both once there are $20$ columns or so. |
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May 7 |
comment |
Why can't I change the value of MaxRecursion in NIntegrate when integrating BesselJ? Depending on your accuracy needs, approximate $\tanh(z)\approx 1$ for $z$ sufficiently large, such as $z\gg 20$. This works because $1 - \tanh(z)$ decays exponentially. The integral of $J_0$ can be evaluated in closed form, so numerical integration is needed only for the product of the Bessel function with $\tanh(z)-1$ from $0$ to this small threshold. |
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May 7 |
awarded | Nice Answer |
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May 7 |
reviewed | Close Mathematica Rlink |
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May 7 |
reviewed | Close why there is a small imaginary part |
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May 6 |
reviewed | Close Most CDF displays in browsers suddenly became grayed out |
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May 6 |
reviewed | Close location of csv file when importing |
