Questions tagged [iteration]

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1
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1answer
62 views

How do we optimise double Tables?

I have made the following code which I shall explain it in two parts: First Part: ...
3
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2answers
108 views

Efficient way to iterate over large list and check conditions

The problem I am trying to solve is how to assign charges to a number of particles based on some conditions on the charges. It is conceptually very simple but requires processing a very large list. ...
1
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1answer
60 views

Iterating of piecewise function

I have this piecewise function $$ f(x)=\begin{cases} x(1.5-0.5x) \quad\text{if $x\le0.5$},\\ x(0.5+0.5x) \quad\text{if $x>0.5$}. \end{cases} $$ How can I calculate iterated functions for it?
0
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1answer
46 views

How to create a list of undefined functions?

I have a undefined function $\phi[i,j]$ where $i=0,1,...,m$ and $i=0,1,...,n$. How can I generate this list: {$\phi[0,0],\phi[1,0],...,\phi[m,0],\phi[0,1],\phi[1,1],...\phi[m,1],\phi[0,2],...,\phi[m,...
2
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1answer
89 views

Solving for the recursion relation for the expansion coefficients of the asymptotic expansion of an ODE

I want to solve for the asymptotic solution of the following differential equation $$ \left(y^2+1\right) R''(y)+y\left(2-p \left(b_{0} \sqrt{y^2+1}\right)^{-p}\right) R'(y)-l (l+1) R(y)=0$$ as $y\...
1
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2answers
88 views

How can I solve iteratively for $\Sigma(r)$, T(r) and h(r)?

My naive attempt: ...
-1
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1answer
57 views

Is there a way to get values from a set of functions with circular dependencies? [closed]

I am using the following code to find iteratively the functions $\Sigma(r)$, $h(r)$ and $T(r)$ ...
0
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1answer
98 views

How to use a test function correctly to terminate a While loop?

I define a test function in order to stop my While loop: ...
0
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0answers
79 views

How can I make my code containing a For loop more Mathematica-style?

I know there are a lot of questions on this site regarding the use of For loops and how to avoid them in Mathematica. However, in my case I believe it is justified,...
3
votes
3answers
532 views

Iteration on a matrix

I want to update "matrix1" 100 times. "matrix3" will be new "matrix1" and it will iterate 100 times. Should I use a loop or function? First iteration is: ...
3
votes
2answers
87 views

Working Iterative formula for a system of equations

I have been given a project, I need to show the use of a version of Newton's method to solve these non-linear equations. The version of Newton's method I am required to use is: $ X_{n+1} = X_n - J^{(-...
0
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1answer
75 views

Plotting Data Iteratively

I have a function of x1 that I can plot in the form y=f(x1). However, I have a relation y=f(x1)=f(x2), where I don't know the form of f(x2), but I can solve for x2 given f(x1) and I want to plot both ...
1
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0answers
94 views

Question about approximate squaring iteration [closed]

the iteration map $x*\left\lceil x \right\rceil$, where the initial term is a non integer rational number $b/a$ with $b>a$ and $a>1$. the growth rate of this iteration is similar to the growth ...
0
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1answer
23 views

Table of convolutes

Inputs Start with a vector $x\in\mathbb{R}^{n}$, and a vector-valued function $f:\mathbb{R}^{n}\mapsto\mathbb{R}^{n}$. Output Given some $k\in\mathbb{Z}^{+}$, what are elegant ways to produce the ...
7
votes
2answers
718 views

Simple Fractal square

I am working on a math question about infinite series, and one of the question images is below. Each new white square has an area that is 1/4 of the previous square. Always looking to learn elegant ...