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Mathematica : Recent Questions and Answers (Page 139)

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

Numerically solving Helmholtz equation in 2D for a Guitar

Hi I am new to using Mathematica, so am not too confident. I am essentially trying to model vibrations of a guitar sound board for a project. It would be...

Asked on 03/22/2021 by sp96

2 answer

Plotting Noisy Experimental data

I want to plot experimental data (from the atomic absorption), but it is hard to make smooth the data. I tried to use Gaussian Filter, but it only works for...

Asked on 03/22/2021 by Saesun Kim

2 answer

Certain plotting functions are setting variables unwantedly

I came across the following problem. Certain plotting functions set variables to values, which I do not want. For example, if I run SliceVectorPlot3D with an example from the documentation,...

Asked on 03/22/2021 by Yousousen

0 answer

How to implement FEM for a 2D PDE with variable coefficients

Consider the following 2D linear time-dependent PDE with variable coefficients:begin{equation}label{Bates_equation}begin{split}frac{partial u(s,v,tau)}{partialtau} &=frac{1}{2}v s^{2}frac{partial^{2}u(s,v,tau)}{partial s^{2}}+frac{1}{2}sigma^{2}vfrac{partial^{2}u(s,v,tau)}{partial v^{2}}&quad +rhosigma v sfrac{partial^{2}u(s,v,tau)}{partial spartial v}&quad +(r-q-lambdaxi)sfrac{partial u(s,v,tau)}{partial s}+kappa(theta-v)frac{partial u(s,v,tau)}{partial...

Asked on 03/22/2021 by Fazlollah

1 answer

Distribute a nested list

I would need a function that distributes a nested list in a specified position. A sample of this function could be:try={{1,{a,b,c},2},3,4,{5,6}}DistributeNested[try,{1,2}]which output would be{{{1,a,2},3,4,{5,6}},{{1,b,2},3,4,{5,6}},{{1,c,2},3,4,{5,6}}}How can I realise such...

Asked on 03/22/2021

1 answer

General definitions of deeply nested functions without SetDelayed, "UpUpValues"

I'd like to assign an "UpUpValue" in a way generalized to any nested head surrounding the value for which the UpUpValue would be defined. That is, if a function...

Asked on 03/22/2021 by Ghersic

1 answer

Finding max of a function of the elements in a list of lists

Consider a list of lists of $ m times n times 3 $:{ {{a1, R1, c11}, {a2, R1, c12}, {a3, R1, c13}, ..., {an, R1, c1n}}, {{a1, R2,...

Asked on 03/22/2021 by user55777

3 answer

How to create an infinite Table of numbers

I wish to create to generate the set ${pm , 5^n : nin mathbb{N}cup {0} }$ and solve the equation $a+b =c+d$ for all elements quadruplets $a,b,c,d$...

Asked on 03/21/2021 by Gabi23

2 answer

Numerical integration of double integral with two variables

I am trying to numerically integrate the following double integral in MATHEMATICA. This question has also been asked at Wolfram Community ...

Asked on 03/21/2021 by shahrukh

1 answer

why do these two Meijer G functions not cancel each other?

I encountered such expressions in MathematicaMeijerG[{{ }, {1, c + 1/2}}, {{0, c, c, c}, { }}, 1] + MeijerG[{{1}, {c + 1/2}}, {{c, c, c},...

Asked on 03/21/2021 by Jing

1 answer

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