# Niklas Kurz

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**Content Feed**

Question

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

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

ungefär 8 timmar 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...

18 dagar 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 ...

ungefär en månad ago | 1 answer | 0

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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...

ungefär en månad 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)...

ungefär en månad 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...

7 månader ago | 1 answer | 0

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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...

8 månader 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...

9 månader 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...

9 månader 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...

10 månader 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 ...

10 månader ago | 2 answers | 0

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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...

ungefär ett år 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...

ungefär ett år 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...

ungefär ett år 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...

mer än ett år ago | 1 answer | 0

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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 = ...

mer än ett år 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...

mer än ett år 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...

mer än ett år 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)

mer än ett år 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...

mer än ett år 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...

mer än ett år 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; % ...

mer än ett år 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...

mer än ett år 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...

mer än ett år 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 ...

mer än ett år 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 = ...

mer än ett år 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 ...

mer än ett år ago | 1 answer | 0

### 1

answerQuestion

Matlab: differential equation: starting conditions are wrong?

I solved manually: with but if I solve it with Matlab: syms v(t) g alpha m v0; D = diff(v,t) == g - alpha/m*v; ...

mer än ett år ago | 2 answers | 0

### 2

answersQuestion

How to get multiple variables in 'assume' ?

For example If I were to set syms v m g k t real and I want all of them to be handled as variables greater than 0, but not b...

mer än ett år ago | 1 answer | 1

### 1

answerQuestion

Plotting a function with difference between 2 vectors?

I want to plot where is the magnitude of the distance between 2 vectors: : If I would implement this idea in Matlab: [r1,r...

mer än ett år ago | 1 answer | 0