# Niklas Kurz

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**Content Feed**

Question

Solve Equation with symbolic Constants numerically.

Say I have got the Planck's law whose maximum I want to determine numerically: % a = hbar/(pi^2*c^3) % b = hbar./(kB*T); ...

4 months ago | 1 answer | 0

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answerQuestion

Using Matlab to solve 1D Schrödinger Equation (Strange Eigenfunctions)

Following this splendid tutorial (in Python) I tried recreating the code in Matlab First of, here the Python Code: % impor...

4 months ago | 2 answers | 0

### 2

answersQuestion

App designer: How to define self-referring properties?

I'm getting into app designer once again, and right from the start I'm getting desperate. When defining a property, I receive a...

8 months ago | 1 answer | 0

### 1

answerQuestion

How to convert a string into a variable name and assign it a cell of data?

I've read multiple post: converting a string into a variable name seems quite problematic, but in my case convenient. It's abou...

10 months ago | 1 answer | 0

### 1

answerQuestion

How to use string as plot arguments

I was fiddling around a lot: Having two plots, I want to spare some work and define a common string to feed into both plots argu...

11 months ago | 1 answer | 0

### 1

answerQuestion

Increasing speed by fixing axis and grid outside of a loop

Heres a minimal example of what I mean: Axis and grid are set before the loop Pos = [0 0]; axis([0 1 0 1]); grid on ...

11 months ago | 1 answer | 0

### 1

answerQuestion

While loop with all elements meeting the conditions

How do I set a while loop that runs until all elements meet the condition? For instance: t = -100:200; F = t; ind...

11 months ago | 1 answer | 0

### 1

answerQuestion

How to combine 2 function handles of different variables?

Strangely enough I was not able finding an answere to this sinewy problem: Given 2 function handles mu = @(n, dmu, mubar)...

11 months ago | 2 answers | 0

### 2

answersQuestion

Using Matlab to create a LaTex document (for image import)

In order to import multiple figures in LaTex from one folder I have found following code: fileID = fopen('./incl_img_latex.t...

1 year ago | 1 answer | 0

### 1

answerQuestion

How to give trail to particles/ How to fade out plots with time (complex example)

Inspired from a webproject I have created this n-body-simulation: First of a function to acces on: % calculating accelerati...

1 year ago | 2 answers | 0

### 2

answersQuestion

Matlab simulation for planet motion

There were some attemps simulating planetary motion already, but I think mine is straightforward by solving and updating positi...

1 year ago | 2 answers | 0

### 2

answersQuestion

How to plot wave function for finite square well? [Physics question]

A question addressed to other physicist among the MATLAB community: Considering a finite sqaure well potential: It turns o...

1 year ago | 1 answer | 0

### 1

answerQuestion

LaTex for Titles in Appdesigner now possible?

I'm now finding into appdesigner myself and have saw multiple people asking how to incorporate LaTex. There are some workaro...

1 year ago | 1 answer | 0

### 1

answerQuestion

How to plot symbolic function with string specification?

Briefly I want to execute syms x f = x fplot(f,'b','LineWidth',2) but a little fancier. I want the specification to be a ...

1 year ago | 2 answers | 0

### 2

answersQuestion

Matlab wouldn't find simple inverse

Given the function defined via syms x a real; f = x^(a-1) Why Matlab won't find an inverse to that? finverse(f) is resulti...

2 years ago | 2 answers | 0

### 2

answersQuestion

How to plot vectors exactly on the edge of another graph?

The best I've got is expressed by the following: clear [u,v] = meshgrid(-2:0.2:2); f = u.^2+v.^2-1; [du,dv] = grad...

2 years ago | 1 answer | 0

### 1

answerQuestion

Matlab warning when using log

I have quiete a long script basically just consiting of comments for plotting pairs of points and customizing the resulting plo...

2 years ago | 1 answer | 0

### 1

answerQuestion

How to fit a gaussian to unnormalized data

I do know this question has been asked in several kinds plus it's rather a mathematical question for mathstack like sites. But...

2 years ago | 1 answer | 0

### 1

answerQuestion

Does order of multiplication really matter when using simplify ?

I noticed, when I type the following commands: syms x; syms n integer; cn = int(abs(x)*exp(-i*n*x),x,-pi,pi); cnp = ...

2 years ago | 2 answers | 0

### 2

answersQuestion

expand and simplify are not reverse?

I thought any symbolic function that I expand I can simplify getting same results in both direction. But it seems to be just one...

2 years ago | 1 answer | 0

### 1

answerQuestion

How to show axis in 3D

Any time I plot in 3D I get a little confused because of aggravated orientation. The main reason is the missing default visualis...

2 years ago | 1 answer | 0

### 1

answerQuestion

improper integral: exp(ikx) undefined in Matlab?

I wanna integrate: With solution: But Matlab gives NAN: syms x k; assume(k,'integer'); int(exp(1i*k*x),x,-inf,inf)

2 years ago | 1 answer | 0

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answerQuestion

How to fill a volume plot of a vector valued functions (with 3 variables)

Again, I'm ascending new ground, now dealing with volume plots. I'm aware of Matlabs documentary concering this topic. But it do...

2 years ago | 1 answer | 0

### 1

answerQuestion

Filling inside of a plot with color (gradient)

I'm coming back to filling areas with color, trying this time to get the most beautiful result: Here I've got the plain vect...

2 years ago | 1 answer | 0

### 1

answerQuestion

How to include function in legend

I tried all possibl string2functions of Matlab, but not getting quiete the result. Here's my best try: syms x F = x^2; % ...

2 years ago | 2 answers | 0

### 2

answersQuestion

Two different solutions for one differential equation (population model)

I'll try solving the ODE: Substituting Transforming to: Solving I get: Finally, after back substitution: complete so...

2 years ago | 1 answer | 0

### 1

answerQuestion

Error when using variable in axis

I've: syms w we B U A = (w*U)/(sqrt((-w^2+we)^2+(B*w)^2)); syms R L C Aw = subs(A,{B,we},{R/L,1/(L*C)}); fplot(su...

2 years ago | 1 answer | 0

### 1

answerQuestion

How to set Assumptions for function handle?

easy case: I'v gut a function handle: f = @(x,y,z)x.^2+y.^2+z.^2-1; fimplicit3(f) for plotting an implicit function. Now ...

2 years ago | 1 answer | 0

### 1

answerQuestion

Defining a simple function with text/string 'on'

The Idea I'm thinking about really is simple and actually just for getting used to 'functions' My Code is just based on: ax = ...

2 years ago | 1 answer | 0

### 1

answerQuestion

Quiver with color: Add-on

Sadly Matlab didn't enabled color-coded vectors in their ever so neat function quiver Therefore there are endless detours open ...

2 years ago | 1 answer | 0