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Stephan


Last seen: Today
1 221 total contributions since 2017

Knowledge means knowing where it is written...

Interested in:
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- Mathematical Modelling
- Improvement of my programming skills

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Answered
Solving a symbolic system of equations
Try: % Equillateral Strain Rosette Problem % angle values (A = 0, B = 120; C =60; seems to be standard for a 60 degree % eq...

environ 14 heures ago | 1

| accepted

Answered
Why should I use the zeros function?
It is for performance reasons: https://de.mathworks.com/help/matlab/matlab_prog/preallocating-arrays.html

2 jours ago | 1

Answered
Input arguments error on line 2
Divide your code into a function for your ode and the part for solving and plottting the results: y0 = 0; % --> change to 1 for...

2 jours ago | 0

| accepted

Answered
what is wrong?
Typo - it is cos instead of cox, and the usage of '.*' elementwise multiplication x=-3:0.1:3 y=sin(x).*cos(2*x)+1 plot(x,y)

3 jours ago | 0

Answered
Differentiation for relative sensitivity calculation
D_xN = diff(xN,Nd)

3 jours ago | 0

Answered
how to plot this ?
syms x; y=exp(-x).*sin(x); fplot(x,y);

3 jours ago | 1

Answered
Asking for help with syntax for fmincon
The solvers in Matlab accept only one vector as variable. So change y(1) --> x(3) and y(2) --> x(4). Then edit the code this way...

3 jours ago | 0

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Answered
Calculate the population mean of several probability distributions
Du kannst das direkt in der Schleife machen, in dem Du die benötigten Felder der struct ansprichst und die interessierenden Wert...

3 jours ago | 0

Answered
Subscript in figure WHAT AM I DOING WRONG?
<https://de.mathworks.com/matlabcentral/answers/157122-latex-interpreter-mean-bar-with-subscripts>

3 jours ago | 0

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Answered
How get the Adjacency matrix from complete graph
Its trivial: A = ones(n) - diag(diag(ones(n))) or, more easy A = ones(n) - eye(n)

4 jours ago | 0

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Answered
basic error, help me
2 closing brackets missing, one '*' operator missing, one times use './' instead of '/': x = linspace(20,100000); y = 20*log1...

4 jours ago | 0

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Answered
Splitting an array up
use this before reshaping - it discards all data, you dont care about: x = x(:,1:40*2048)

5 jours ago | 0

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Answered
How do I simplify the values of a function?
Can be done with symbolic toolbox - matlabFunction returns an anonymous function the way you want: syms x % known constants a...

5 jours ago | 0

Answered
how can I write more than 1 objective in linprog line
You can not do this in linprog. See here instead: https://de.mathworks.com/help/optim/multiobjective-optimization.html If you ...

5 jours ago | 0

Answered
How to permute binary numbers to a specific permutation
https://de.mathworks.com/help/matlab/ref/circshift.html F=[0 6 2 5 4 3 6 1]' A = dec2bin(F) B = circshift(A,1,2) gives: F =...

6 jours ago | 0

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Answered
I need help fixing an error that pops up when running my code. "Undefined function or variable 't'.
Seee the code below: % [Car B] is traveling a distance d ahead of [Car A]. Both cars are traveling % at the same initial veloc...

6 jours ago | 0

Answered
How to Create an Anonymous Function?
Try to write it in one line - i guess you use an older release of Matlab, that does not support the semicolon operator in a seco...

6 jours ago | 0

Answered
Solving nonlinear second order diferential equation
%% Dados iniciais clear Massa_foguete_seco = 3000; % Kg Massa_combustivel_inicial = 3000; % kg Empuxo ...

8 jours ago | 0

Answered
2D Histogram aus 2 Matrizen
Immer dann, wenn in A oder B eine 0 vorkommt, wird g_a oder eben g_b gleich Null. Wenn dann im nächsen Schritt versucht wird, H_...

9 jours ago | 0

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Answered
population size of pso in matlab
You find it here: https://de.mathworks.com/help/gads/particleswarm.html?s_tid=srchtitle#budidgf-options The entry is in the th...

9 jours ago | 0

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Answered
Storing values in a matrix
% Constants m=15; l=2; g=9.81; d=l/2; Io=(1/3)*m*(l^2); wn=sqrt((m*g*d)/Io); % function handle for linearized ode Vib_...

9 jours ago | 0

Answered
ODE solvers - passing parameters
<https://de.mathworks.com/help/optim/ug/passing-extra-parameters.html>

environ un mois ago | 0

Answered
Matlab code for solving the following system equation
>> A = [2 1 5; 2 2 3; 1 3 3] A = 2 1 5 2 2 3 1 3 3 >> b = [5; 7; 6] b = ...

environ un mois ago | 0

Answered
How to solve a LPP when the A of linprog does not form a square matrix? I have 5 variables and 2 constraints.
% define all constraints A = [2, 2, 2, 0.6, 0.3; 0 0.04, 0.08, 0.09, 0.135; -eye(5)] b = [750, 30.75, zeros(1,5)] ...

environ un mois ago | 0

Answered
How to multiply three scalar value one by one to other five scalar value and get all the results in Simulink
[1 2 3] .* [3 5 7 9]'

environ un mois ago | 0

Answered
Solving Integral via MATLAB!!
syms a b z eq = (a-z) / ((1+z)*(b+z)); pretty(eq) sol = int(eq,z); pretty(sol)

environ 2 mois ago | 0

Answered
I can not plot values
syms Frx B m V1 V2 P1g P2g Frz alfa1 A1 V M Degree Fr W Weight m1=18;B1=1;P1g=0;V1=250;A1=1;alfa1=0; m2=m1;B2=B1;P2g=0;V2=250;...

environ 2 mois ago | 0

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Answered
Reinforcement Learning toolbox step function
The action the agent has choosen in the last step, usually has an impact on the environment. To let the step function know what ...

environ 2 mois ago | 0

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Answered
Why is this break not executing for the summation of pi
You never reach the value of your ratio of PrevSum/pie. I inserted 2 lines, the first saves the ratio in every single run of you...

environ 2 mois ago | 0

Answered
Making a row vector
v = [0:100 ,100:-5:0]

environ 2 mois ago | 1

| accepted

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