================================== Top new questions this week: ==================================
[Is Mathematica worth it for me?] http://mathematica.stackexchange.com/questions/100072/is-mathematica-worth-it-for-me
I’m 13 years old and in 7th grade. I’m currently in Algebra 1, and I have fallen in love with both math and programming.
When I came upon Mathematica, it was awesome. My two favorite things fused ...
- asked by TreFox (50 votes), answered by Pillsy (33 votes)
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[GroupBy twice gives different results] http://mathematica.stackexchange.com/questions/100139/groupby-twice-gives-different-results
update: confirmed as a bug related to ’N’ when using GroupBy or GatherBy. It is a bug at least since version 7
It took me quite a lot of time to finally trace down to this strange output. I really ...
- asked by matheorem (25 votes), answered by Patrick Stevens (15 votes)
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[How to make a blob in 3D?] http://mathematica.stackexchange.com/questions/99754/how-to-make-a-blob-in-3d
I am trying to make a blob like the one shown below, but in 3D so I can rotate it. I’m trying to use ParametricPlot3D or SphericalPlot3D. I can make a sphere easily. But my knowledge of how to modify ...
- asked by Michael McCain (20 votes), answered by Eric Towers (12 votes)
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[Coordinate system transformation problem (about Euler angle)] http://mathematica.stackexchange.com/questions/100054/coordinate-system-transformation-problem-about-euler-angle
This question comes from the work that constructing the general cylinder by the NURBS. I have implemented the point-set \(P_1,P_2,\cdots ,P_n\) that in the \(O-xyz\) plane, now I want to implement the ...
- asked by Shutao TANG (14 votes), answered by J. M. (9 votes)
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[List of symbols marked [[EXPERIMENTAL]] in the documentation] http://mathematica.stackexchange.com/questions/100058/list-of-symbols-marked-experimental-in-the-documentation
Some of the built-in Wolfram Language symbols are marked as [[EXPERIMENTAL]] in the documentation. For example
[Echo]
How can I get a list of all the symbols marked as [[EXPERIMENTAL]]?
(This ...
- asked by Karsten 7. (14 votes), answered by Karsten 7. (20 votes)
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[Random letters: What is the chance, that true words are coming?] http://mathematica.stackexchange.com/questions/99800/random-letters-what-is-the-chance-that-true-words-are-coming
Suppose, that we are just typing random letters with our keyboards(we use space bar too). We don’t make difference between big and small letters. If we work for a long time, how much from the words ...
- asked by Arquis (13 votes), answered by belisarius has settled (18 votes)
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[How to take and evaluate a specific part of a list without evaluating the rest?] http://mathematica.stackexchange.com/questions/100217/how-to-take-and-evaluate-a-specific-part-of-a-list-without-evaluating-the-rest
I have a large list, for example, lis = {x + y, x y, Sin[x] y + Exp[y], x^2 y} and its elements depend on variables x and y. Later I assign numerical values to x and y x = {1, 2, 3, 4, 5} y = {3, ...
- asked by renphysics (9 votes), answered by Chris Degnen (9 votes)
================================== Greatest hits from previous weeks: ==================================
[How to use Mathematica functions in Python programs?] http://mathematica.stackexchange.com/questions/4643/how-to-use-mathematica-functions-in-python-programs
I’d like to know how can I call Mathematica functions from Python.
I appreciate a example, for example, using the Mathematica function Prime.
I had search about MathLink but how to use it in Python ...
- asked by GarouDan (35 votes), answered by GarouDan (14 votes)
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[Mathematica sporadically crashes on open] http://mathematica.stackexchange.com/questions/32232/mathematica-sporadically-crashes-on-open
Sometimes, when I open Mathematica, while the opening splash screen still says "Initializing Kernel Connections", Windows will tell me that "Wolfram Mathematica 9 has stopped working". This will ...
- asked by William Kunkel (9 votes), answered by Bingo (5 votes)
================================== Can you answer these? ==================================
[Can’t get Mathematica to Import PDF files with diacritics on the file name] http://mathematica.stackexchange.com/questions/99980/cant-get-mathematica-to-import-pdf-files-with-diacritics-on-the-file-name
Tested with versions 9.0.0, 10.0.2 and 10.3.0, all under OS X 10.10.5. The drag-and-drop front-end functionality also results in $Failed. Surprisingly, Importing, JPEGs, TXTs, and XLSX work just ...
- asked by Aisamu (4 votes)
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[Where can I find documentation on use of special characters in templates?] http://mathematica.stackexchange.com/questions/100023/where-can-i-find-documentation-on-use-of-special-characters-in-templates
I am new to Templates. I have seen the usage "\!\(\*StyleBox ...)" as here: disabling templates What does the string "!(*" accomplish and can I find some documentation of this notation?
- asked by John McGee (1 vote)
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[Exponential Matrix Diffentiation] http://mathematica.stackexchange.com/questions/100214/exponential-matrix-diffentiation
I have been struggling with the following question while solving an optimization problem in \(\mathbb {R}_{+}^G\). Basically, I have \[\min _{y \in \mathbb {R}_{+}^G} F(y) = y^{T}\mathcal {K} + \exp (-y^{T} ... \]
- asked by Guilherme Thompson (1 vote)