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Mathematica : Recent Questions and Answers (Page 81)

Find answers to your questions about Mathematica or help others by answering their Mathematica questions.

How to simplify sqrt without imaginary unit

I've a system of equations and one solution that Mathematica throws is: $$ x=frac{mathbb{I} b sqrt{pA - pS}}{sqrt{-3 pA + 3 pS}}$$ knowing that $pS,pA in mathbb{R}$ and...

Asked on 06/09/2021 by daaan

0 answer

Programming language prototyping in Mathematica

Are you aware of any projects using the Wolfram language resp. Mathematica as an environment to explore the design of programming languages - in particular languages with a focus on...

Asked on 06/09/2021 by Math Gaudium

1 answer

Singularities forming on boundary while solving system of pde's

Backslide introduced after 9.0.1, fixed in 12.0.1 or earlier.This is a follow up of a previous question I asked regarding solving a system of coupled, non-linear partial differential...

Asked on 06/09/2021 by Woody

1 answer

Plotting imaginary part on y-axis against real part on x-axis of complex momentum

I want to plot a complex momentum in complex plane where the y-axis shows imaginary values and x-axis shows the real values. I tried ReIm command but it plots Re...

Asked on 06/09/2021 by Anwar

0 answer

SphericalPlot3D for a list

This question was asked before (here), but I couldn't get the answers to work.I have a list of valuesList1=Table[{theta,phi,f1[theta,phi]},{theta,0,Pi,Pi/10},{phi,0,2Pi,2Pi/10}]List2=Table[{theta,phi,f2[theta,phi]},{theta,0,Pi,Pi/10},{phi,0,2Pi,2Pi/10}]f=Table[{List1[[i,j,1]],List1[[i,j,2]],List1[[i,j,3]]^2+List2[[i,j,3]]^2},{i,1,Length[List1]},{j,1,Length[List1[[1]]]}]Sample functions for f1 and f2:f1[theta,phi]=Sin[3 theta]Cos[phi];f2[theta,phi]=Cos[theta] Sin[phi];How...

Asked on 06/09/2021

1 answer

Is this second solution to this ODE correct?

Mathematica V 12.2 on windows 10.I was using Mathematica to check my solution for this ODE.Mathematica gives 2 solutions. Any idea where the second solution came...

Asked on 06/08/2021

1 answer

MapThread over sublists of different length

I have a list which looks like this: l={{1,0,3,4},{0,2},{0,0,1,3},{1,2,0}}. Now I would like to count how many 0s the sublists contain in the first, second,... slot.The result for this...

Asked on 06/08/2021 by RMMA

6 answer

Curve fitting by running through hundreds of models and return the one with best fit

In the past, I used to solve a lot of my regression analysis (curve fitting) problems with a program called DataFit which runs on Windows. It has hundreds of regression...

Asked on 06/08/2021 by MathLind

2 answer

Is it possible to ask Mathematica to draw a plot like the given one?

Is it possible to ask Mathematica to draw a plot like this? ...

Asked on 06/08/2021

2 answer

How to import and cut n images in 6 parts hopefully proportional to the written and export them to a directory?

I tried to get it well formatted but I won it I hope the question is understoodI'm using the google form which allows you to do multiple choice tests,...

Asked on 06/08/2021 by juan muñoz

1 answer

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