================================== Top new questions this week: ==================================
[Does Mathematica have a built-in tool that allows one to operate on both sides of an equation?]http://mathematica.stackexchange.com/questions/86906/does-mathematica-have-a-built-in-tool-that-allows-one-to-operate-on-both-sides-o
Geogebra has a very neat CAS view that allows one to solve an equation step by step in the following fashion:
\(\quad \quad \quad \quad \quad \quad \quad \quad \quad \)
You type an equation and ...
- asked by Voyska (19 votes), answered by Alexei Boulbitch (25 votes)
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[Is ColorDistance symmetric?]http://mathematica.stackexchange.com/questions/86730/is-colordistance-symmetric
Is the function ColorDistance symmetric, i.e. is it always true that ColorDistance[a,b] == ColorDistance[b,a], as use of the word distance would suggest?
- asked by Szabolcs (15 votes), answered by Szabolcs (15 votes)
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[my Mathematica has turned orange and not able to find out why]http://mathematica.stackexchange.com/questions/87072/my-mathematica-has-turned-orange-and-not-able-to-find-out-why
I do not know what happened. But when I rebooted my PC, now Mathematica comes up orange colored. I shut down the PC and tried again, it is still orange. Here is screen shot:
I also did a reset. ...
- asked by Nasser (14 votes), answered by Sjoerd C. de Vries (14 votes)
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[Solve a trig equation system] http://mathematica.stackexchange.com/questions/86894/solve-a-trig-equation-system
Background of the problem
In the same plane, P is a fixed point, A,B,C are moving point, PA=a, PB=b, PC=c, find the maximize perimeter of ?ABC.
let ?BPC=A, ?CPA=B, ?APB=2*Pi-A-B, then the ...
- asked by mathe (13 votes), answered by Guess who it is. (19 votes)
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[How to retrieve current FaceForm?] http://mathematica.stackexchange.com/questions/86990/how-to-retrieve-current-faceform
The current colour in a Graphics object can be retrieved using CurrentValue["Color"] for use in Dynamic stuff.
Example:
Graphics[ RGBColor[2/3, 1/3, 2/3], Dynamic[If[CurrentValue["MouseOver"], ...
- asked by Szabolcs (12 votes), answered by Mr.Wizard (10 votes)
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[Using Simplify on a consistent system returns False]http://mathematica.stackexchange.com/questions/86791/using-simplify-on-a-consistent-system-returns-false
Bug introduced in 8.0 and persisting through 10.1.0 or later
It’s late, but am I missing something here? Why should two independent equations, which together are consistent, Simplify to False?
...
- asked by Michael E2 (10 votes), answered by Jens (5 votes)
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[Modifying strings in a list efficiently] http://mathematica.stackexchange.com/questions/86778/modifying-strings-in-a-list-efficiently
I have a list of strings \(\{s_1,s_2,\ldots ,s_n\}\). I would like to to produce the following list of strings:
$$ \{s_1<>1,\ 1<>s_2<>1,\ldots,\ 1<>s_n\} $$
In other words, I want ...
- asked by pre-kidney (10 votes), answered by ciao (7 votes)
================================== Greatest hits from previous weeks: ==================================
[Finding real roots of negative numbers (for example, \(\sqrt [3]{-8}\))] http://mathematica.stackexchange.com/questions/3886/finding-real-roots-of-negative-numbers-for-example-sqrt3-8
Say I want to quickly calculate \(\sqrt [3]{-8}\), to which the most obvious solution is \(-2\).
When I input \(\sqrt [3]{-8}\) or Power[-8, 3^-1], Mathematica gives the result \(2 (-1)^{1/3}\). Not what I
...
- asked by jtbandes (36 votes), answered by Brett Champion (19 votes)
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[Parallel and perpendicular symbol from Mathematica to LaTeX] http://mathematica.stackexchange.com/questions/46538/parallel-and-perpendicular-symbol-from-mathematica-to-latex
I want to get the following expression from Mathematica to LaTeX:
\begin{bmatrix} E_{\parallel} \\ E_{\perp} \end{bmatrix}
I have tried to use inbuilt ’symbol’ character from the special ...
- asked by Steve Hatcher (4 votes), answered by Sjoerd C. de Vries (9 votes)
================================== Can you answer these? ==================================
[Why is the Max function so slow when operating on lists of dates?]http://mathematica.stackexchange.com/questions/87204/why-is-the-max-function-so-slow-when-operating-on-lists-of-dates
Example:
dates = DateRange[DateObject[], DatePlus[DateObject[], 15]]; First[AbsoluteTiming[Max[dates]]]
(* 21.364247 *)
As a workaround, DateObject[Max[AbsoluteTime /@ dates]] will get the same ...
- asked by rhennigan (3 votes)
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[Discrete Fourier Transform baseline subtraction]http://mathematica.stackexchange.com/questions/86951/discrete-fourier-transform-baseline-subtraction
I am trying to remove sinusoidal variability from a set of evenly-spaced intensity vs. time data. These data contain periodic events that are separated by a normalized (but sinusoidally variable) ...
- asked by John (1 vote)
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[How to use Wolfram language in an external program with low latency?]http://mathematica.stackexchange.com/questions/87168/how-to-use-wolfram-language-in-an-external-program-with-low-latency
Im using Wolfram language on Pi B,and I want to compile a ’.m’ file (like "test.m" that contains Wolfram functions), in an external program like a C/C++ and then Export the output in an image file ...
- asked by Babak akbari (1 vote)