Mathematica Weekly Newsletter - Monday, June 29, 2015

Top new questions this week: What are the Wolfram Language's relative strengths for machine learning? I see a low use of Mathematica in Kaggle competitions. Why would one use the Wolfram Language versus R, Python, or Julia for machine learning? Besides prettier plots and the Manipulate function, ... machine-learning   asked by andandandand 19 votes answered by image_doctor 22 votes Does Mathematica have a built-in tool that allows one to operate on both sides of an equation? 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 ... equation-solving   asked by Voyska 18 votes answered by Alexei Boulbitch 25 votes 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? color distance   asked by Szabolcs 15 votes answered by Szabolcs 15 votes 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. ... notebooks   asked by Nasser 14 votes answered by Sjoerd C. de Vries 14 votes 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 ... equation-solving performance-tuning symbolic geometry   asked by mathe 13 votes answered by Guess who it is. 17 votes Is FrameTicks broken in 10.1.0? On my system, Mathematica 10.1.0 under Windows, none of these FrameTicks documentation examples work correctly: (* Draw frame ticks at the specified positions with the specific labels: *) ... plotting error-messages documentation ticks version-10.1   asked by Mr.Wizard 13 votes answered by rcollyer 14 votes 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"], ... graphics dynamic undocumented style   asked by Szabolcs 12 votes answered by Mr.Wizard 10 votes Greatest hits from previous weeks: Elegant operations on matrix rows and columns Question The Mathematica tutorial has a section 'Basic Matrix Operations', describing operations like transpose, inverse and determinant. These operations all work on entire matrices. I am missing a ... list-manipulation matrix array faq   asked by sjdh 84 votes answered by Mr.Wizard 29 votes How to make Jacobian automatically in Mathematica If we have two vectors, a and b, how can I make Jacobian matrix automatically in Mathematica? $$ a=\left( \begin{array}{c} \text{x1}^3+2\text{x2}^2 \\ 3\text{x1}^4+7\text{x2} \end{array} ... vector-calculus   asked by George Mills 19 votes answered by Jens 26 votes Can you answer these? Why does FreeQ seem not to work with complex numbers? I guess I do not understand how Mathematica evaluates this simple expression inside FreeQ a = 2 I FreeQ[a, I] FreeQ[2 I, I] FreeQ[I, I] (* 2 I *) (* True *) (* True *) (* False *) evaluation complex   asked by Peter 2 votes How to set icon for Mathematica in Ubuntu Linux? I installed Mathematica 9 and 10 on Ubuntu Linux 14.04 with Unity. How to set icons for them? At the moment they show up as gray squares with a question mark in it on the dock. linux   asked by qazwsx 1 vote 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) ... fourier-analysis time-series   asked by John 1 vote

Subscribe to more Stack Exchange newsletters Unsubscribe from this newsletter or change your email preferences by visiting your subscriptions page on stackexchange.com. Questions? Comments? Let us know on our feedback site. If you no longer want to receive mail from Stack Exchange, unsubscribe from all stackexchange.com emails. Stack Exchange, Inc. 110 William St, 28th Floor, NY NY 10038 <3