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Mathematica : Recent Questions and Answers (Page 110)

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

Why "Joined" does not draw all the lines?

I'm working on a project in order to plot a graphical method for finite-difference equations called cobweb method. The next figure was succesful try for $$x_{t+1}...

Asked on 05/01/2021

1 answer

How to replace one parameter with multiple values

I am a beginner. I have a function with one parameter and I would like to replace a list of values that have names. I would like a result so...

Asked on 05/01/2021 by schd

2 answer

Another nesting question

I have a function F[i_Integer,B_List,l_list] which spits out a list {B',l'} where B' and l' are of the same dimension as B and l, respectively. Now I want to get...

Asked on 05/01/2021 by amator2357

1 answer

Find barycenter of spectral data

I am trying to find the barycenter of some spectra using numerical integration. I tried to find the wavelength for which the integral splits the spectrum in two equal areas,...

Asked on 05/01/2021

1 answer

How to plot a ParametricPlot graph

I want to plot 1100(r[t]-14) vs θ[t]. How can I plot the functions of r[t] and θ[t] from NDsolve? This is my code to find r[t] and θ[t]:m =...

Asked on 04/30/2021 by siraphat

1 answer

Rendering graphics: UsingFrontEnd vs using a front end

I'm trying to understand how Graphics expressions are rendered. I create an invisible notebook, write a cell and evaluate it, then rasterize the notebook.UsingFrontEnd[nb = CreateNotebook[Visible->False];NotebookWrite[nb,Cell["Graphics[Disk[{0,0}]]","Input"]];NotebookEvaluate[nb,InsertResults->True];Export["test_out.jpg",Rasterize[nb]];]If I open Mathematica...

Asked on 04/29/2021 by srossd

1 answer

Horizon Plots in Mathematica?

I am trying to create horizon plots in Mathematica similar to what is described here: http://timelyportfolio.blogspot.com/2012/08/more-on-horizon-charts.html Any suggestions how to approach this? ...

Asked on 04/29/2021 by VanFalk

3 answer

Commutation, symmetrizer and duplication matrices

The following 3 matrices are useful when viewing matrices as vectors, known as commutation $K_n$, symmetrizer $N_n$ and duplication $G_n$. They are usually defined by their matrix...

Asked on 04/29/2021

2 answer

Why is Mathematica not simplifying further even after providing assumptions?

m = {{0, 0, 1, 0}, {0, 0, 0, 1}, {-5 X^2, X^2, 0, 0}, {X^2, -X^2, 0, 0}};Simplify[Eigenvalues[m], Assumptions -> X>0]The output I get is this below. The...

Asked on 04/29/2021

1 answer

Using the Line command with a bound on distance between points

Suppose I use the Line command applied to a list (or more accurately apply Graphics[Line[list]] or Graphics3D[Line[list]]). Is there some way to only connect points which are less than a...

Asked on 04/29/2021

0 answer

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