Mathematica Questions, Problems & Solutions : TransWikia.com ~ Page 194

Rescale Graphics3D Based on Box Ratios

If I plot a sphere using Graphics3D with BoxRatios->1, then I get a nice looking plot:Show[Graphics3D[{Red, Sphere[{0, 0, 0}, 1]}], BoxRatios -> 1, PlotRange -> {{-4, 4}, {-4,...

Asked on 01/11/2021 by BetterPlots

1 answer

How to apply color gradient in listplot based on the density of points

I have a list of points ( a list with sub lists which are {x,y} coordinates. I would like to have a listplot where the areas with higher density of...

Asked on 01/11/2021 by Pjana

1 answer

Solving the heat equation using Laplace Transforms

I am trying to solve the 1-D heat equation using Laplace Transform theory. The equation is as follows. I don't have the capability to write the symbols so I will...

Asked on 01/11/2021 by user41071

0 answer

How do I get `ArrayMesh` to reverse the order of data in a 3D array?

The following array has non-zero entries in the cells where all three indices are equal:foo = SparseArray[{i_, i_, i_} -> 1, {4, 4, 4}]When I try to render this...

Asked on 01/11/2021

1 answer

Simple Question: How to simplify what is inside the Sin function like below?

I have this code of Mathematica(1/(2 (fj - fk) π)) Cos[(fj - fk) π T + (fj - fk) π (T + δt)] Sin[(fj - ...

Asked on 01/11/2021

1 answer

Solving system of coupled PDEs with method of lines

I'm trying to solve: $partial _{z} U(z,t) = i sqrt{d} P(z,t)$ $partial _{t} P(z,t) = -P(z, t) + i sqrt{d} U(z,t) + i Omega_{c}(t)S(z, t)$ $partial _{t}...

Asked on 01/11/2021 by pbdiddy

1 answer

How to obtain eigenvectors in AceGen

I'm trying to obtain eigenvectors of a 3D plastic stretch tensor $C_p$. There is no SMSEigenvectors function, so I tried with Eigenvectors[Cp], but internal error occurs:Internal error: SMSStrictFunction Subroutine:...

Asked on 01/10/2021 by LukaP

1 answer

Taking the square root of the first element of a list

If I have a list for example : {{4,1},{9,2},{16,3},{25,4}}Is there a command that replaces the first element by its square root and returns a list ?...

Asked on 01/10/2021 by J.A

5 answer

Import an RDATA, SPSS, SAS, or STATA file into Mathematica

I would like to import the World Value Survey data file into Mathematica, but it's only given in spss, sas or stata formats, which are statistical analysis softwares format...

Asked on 01/10/2021 by Sulli

3 answer

Clebsch-Gordan coefficients: General Expression Does Not Match Specific Expression

The expression ClebschGordan[{2, 0}, {4, 0}, {2, 0}] yields the correct result of Sqrt[2/7]. However the expression ClebschGordan[{2, 0}, {l2, 0}, {2, 0}]/. l2 -> 4 yields Indeterminate. Indeed, ClebschGordan[{2,...

Asked on 01/10/2021 by nanofish

1 answer

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