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19/20 answers
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Jul
3
comment Resources for beautiful Mathematica Stylesheets
I'm only 6 more upvotes away from the Great Question Badge! Btw, does someone know whether the Awared 2 times really means that there are only 2 great questions in the whole SE network??
Jul
3
comment Open-source IntelliJ IDEA plugin to support Mathematica development
@elbOlita I have no experience with custom folding but I certainly know how to implement folding support for the plugin. Throughout the whole time I was working on features, I very often tended to concentrate on things that I personally use (I know, very selfish). Code folding is one of the things I hate :-) Nevertheless, if there were more people who would love this, I probably would add it to the plugin. The implementation will be very similar to how code-indentation works.
Jun
25
comment How to produce a matrix plot from 3 matrices a, b and c following RGBColor[a[[i,j]],b[[i,j]],c[[i,j]]]?
@PablodeCastro Have you tried setting ColorFunction and ColorFunctionScaling explicitly? I added this section to the answer. I thought that was clear and that only the transformation of the matrices was hard.
Jun
23
comment Failure in integrating from an interpolating function!
And btw it seems your solution works fine because you used x and not ξ like OP did. Really weird
Jun
23
comment Failure in integrating from an interpolating function!
I'm probably going nuts here but for me it makes a difference whether I write NIntegrate[ff[x], {x, 0, 1}] which works fine, or whether I use NIntegrate[ff[z], {z, 0, 1}], which gives a different result and throws errors.
Jun
23
comment Exporting Dataset to WDX format fails
@LeonidShifrin To be clear, I only need to be portable across operating systems, not over different Mathematica versions!
Jun
23
comment Exporting Dataset to WDX format fails
@LeonidShifrin Long story short: I had a big Excel table (not mine) and turned it into a DataSet and I wanted to store it so that I don't have to do this conversion again. I distinctly remember reading somewhere that MX is portable now, but I wasn't sure and I was too lazy to search; the doc of MX explicitly says it's non-portable so I tried WDX. Is the documentation wrong?
Jun
23
comment Exporting Dataset to WDX format fails
@WReach Thanks for the digging. I already reported it to WRI.
Jun
22
comment I have the minimum Y value. I want to find the corresponding X value from the list
That was my first thought, but I dropped it without testing because we need to compare the last elements. My thought was that this makes it slower. It seems my decision was premature. +1
Jun
22
comment I have the minimum Y value. I want to find the corresponding X value from the list
@BlacKow I think it is even worse with the new TakeSmallestBy function which should outperform all other solutions, because it is specifically made for, well, taking the smallest element from a list..
Jun
22
comment I have the minimum Y value. I want to find the corresponding X value from the list
@chuy I have to say it is embarrassing that a function like TakeSmallestBy, introduced in version 10.1 is twice as slow as a SortBy and 4x slower than a simple Do loop written in less than a minute. This makes such things nothing more then syntactic sugar.
Jun
22
comment Fun/Frustration With Coding Coding Theory
Look in your big code block at line 4. I made an image that shows where a comma and a bracket is missing. In general, when your question contains too much highly specific code, then users tend to ignore it. I already showed you in my first comment, why your If expressions stay unevaluated. Didn't that help?
Jun
22
comment Using periodic boundary conditions in NDSolve
@bbgodfrey I have added a section about the boundary. I additionally compared your first solution with my one. Seems they are the same i.stack.imgur.com/8hetW.png
Jun
22
comment Using periodic boundary conditions in NDSolve
@bbgodfrey I have to say that I just presented the idea, I have chosen an arbitrary boundary condition, because the deq of the OP doesn't look exactly like the laplace equation in polar coordinates. I think the boundary needs to be Sin[ArcTan[x, y]] and a plot (in Cartesian) shows that it is similar to your result: i.stack.imgur.com/DVbOq.png
Jun
22
comment Using periodic boundary conditions in NDSolve
I might be wrong, but as far as I see this, the OP wants to solve the laplace equation on an annulus. There, values at the inner boundary would arise naturally since there really is no boundary in polar coordinates. I guess there is no way to specify this directly. Simply leaving them out doesn't work either: Import["http://goo.gl/NaH6rM"]["http://i.stack.imgur.com/JgpcX.png"]. Your link to the FEM is probably the best choice.
Jun
18
comment How to iterate over the columns of a Dataset?
No, leave it. I don't think my answer looks especially beautiful and the more different ways (even if the differ only a bit) we have, the better.
Jun
17
comment How do I solve this ODE numerically in Mathematica?
@BobHanlon Fixed it. Thanks.
Jun
17
comment How do I solve this ODE numerically in Mathematica?
@Trix If this answer is the solution, then mark it with the green checkmark that you find below the up- and downvote buttons.
Jun
17
comment Mathematica vs Python - how does it compare to Python's scientific computing suite?
Maybe this is a stupid question and until now, I had very little contact with python but which package of python lets you do analytical stuff like Integrate[Sqrt[x + Sqrt[x]], x]?
Jun
17
comment Floating highlighting bug
@Kuba Then there is more reason to report it. Maybe a two people bug is already the critical line where WRI starts investigating. Especially, since it happens on Windows (and not on Linux).