# Questions tagged [code-request]

Questions on finding existing Mathematica implementations or expertise to address a clearly stated problem.

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### How to Draw Rectangle Chart Using Three Layers of Data?

I have some data given at three levels: ...
316 views

### How to use Callout in a directed graph with circular embedding?

Given the following code: ...
414 views

### Selecting string elements from list by using strings from another list

Given two lists of string elements list1 and list2: ...
123 views

Given: ...
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Given ...
1 vote
55 views

### How to inverse matrix equations? [closed]

I've never used matematica before so still learning. I'm trying to show that two equations below are equal to one another. To do that, doing an inverse transformation from 3.5-3 to 3.5-4 would ...
118 views

### Convert R code to Mathematica code of Poisson log-likelihood for the epidemic curve

I want to define a function that simulates the model for a given combination of parameters and calculates the Poisson log-likelihood for the epidemic curve of reported cases: ...
171 views

### Improve performance of Linear Optimization

EDIT I am reframing the question here by pulling out the relevant part about linear optimization, you can find the original question and the entire code down below. I am trying to increase the ...
386 views

### A simpler or more concise way to divide the boundary of a polygon into equal arc lengths?

I am really looking just for the least amount of code needed to do this but it is still readable. Here is the same polygon but the border is respectively split up into 10, 20, and 30 points along the ...
89 views

### Covering a rectangle with shapes/closed curves of equal area?

Motivation: We want to cover a rectangle using smaller, non-overlapping shapes with the same area: the difference between the total area of the shapes and the area of the rectangle should be zero or ...
1 vote
68 views

### How can I write the code for an inverse integral transform?

How can I code any type of integral transform with its inverse integral transform in Mathematica which gives the correct results and properties? Below is the example for Elzaki transform: ...
44 views

For a long time now I want to download the attachments from my yahoo.con mail, only the files, no text, but in batches, so MMA gets into my mail and downloads every attached file it finds in a folder. ...
1 vote
67 views

### How to represent a digraph in a 2D circle structure using NeighborhoodGraph[.]

This code works and delivers NeighborhooGraph[.] of a chosen vertex. The resulting graph is bit difficult to understand and therefore I like represent the same ...
115 views

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### Why my bifurcation diagram can't be created?

I just tried to creat Bifurcation diagram for the following Duffing equation: $$\ddot{x}-ax+bx^{3}+cx^{5}+A \,\cos \left(( \omega t)\right)+\gamma\, \dot{x}=g,\dot x(0) =0,x(0)=0$$ with g: n \...