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Mathematica : Recent Questions and Answers (Page 9)

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

How to solve Nonlinear coupled ODEs using DSolve

I cannot solve such a system of coupled ODEs in MMA 12.1 using DSolve. i.e. output is equal to the input equations ... (see the attached figure)Here, each solution...

Asked on 10/22/2021 by ABCDEMMM

2 answer

How to solve Partial differential equation (PDE) with delay!

I just have one question please, I searched on Mathematica documents concerning partial differential equations with delay, all I had found is ordinary differential equations(EDO), that's means equation depends on...

Asked on 10/22/2021 by walid fssm

0 answer

Getting the contours near a singularity when using ListContourPlot

I need your advice. I'm using ListContourPlot to plot the lines of force, but It always skip the line, which are the nearest of the upper electrode. ...

Asked on 10/22/2021 by Dominika

0 answer

Why RegionPlot does not show the negative part of a function?

I have this function $$ f(x)=frac{1-25 x^2}{left| 25 x^2-1right| };frac{2500 x}{sqrt{left(25 x^2-1right)^2 sinh (pi x)+9}}+cosh ^{-1}left(frac{1000 x^2+left(25 x^2-1right)^2}{left(25 x^2+1right)^2}right) $$ f[x_] := ArcCosh[(1000 x^2 +...

Asked on 10/22/2021 by user73733

1 answer

Modified "Plus" function: how to save just the final result of an addition of multiple objects?

In my version of object-oriented programming in Mathematica, essentially (without going into details) obj[a] is a reference to an object whose actual data is stored inside data[a]. Methods like obj[a][function]...

Asked on 10/22/2021

1 answer

Changing AxesOrigin on a ListPointPlot3D

How do you change the AxesOrigin to {0,0,0} for ListLinePlot3D?The code I initially have looks like thisListPointPlot3D[Table[Sin[j + i], {i, 1}, {j, 0, 3, 0.1}], AxesLabel -> {"x",...

Asked on 10/22/2021

1 answer

Add calculation name on dataset statistics

I am working on, with the Animal Weights data set and creating MyFunctionwhich calculates the Max,Min,Mean,Median and first quartile. Then a apply the function to the data set and show...

Asked on 10/22/2021

1 answer

Furthest point from nearby objects, packing a sphere on a region interior

Suppose I have a boundary $partialOmega$ of a region $Omegasubset mathbb{R}^3$ and within this are some compact objects $B_isubsetOmega$. They could be points, lines, polygons, complex 3D...

Asked on 10/22/2021

1 answer

How to perform fitting with convolution of two functions in Mathematica?

I have an experimental data as shown bellow. data = {{1582.41939`, 0}, {1582.44618`, 2}, {1582.47297`, 3}, {1582.49976`, 2}, {1582.52655`, 6}, {1582.55334`, 9}, {1582.58013`, 13}, {1582.60692`, 21}, {1582.63371`, 24}, {1582.6605`, 27},...

Asked on 10/22/2021 by user14634

1 answer

Difficult Numerical Integral with special functions

ContextI am trying to calculate some transport coefficients for a heat equation in confinement. The Boundaries are in the $x$ direction, and $y$ represents the parallel directions. This...

Asked on 10/22/2021

2 answer

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