# Stephan

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Knowledge means knowing where it is written... Interested in: - Optimization - Mathematical Modelling - Improvement of my programming skills

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optimization with two-part value range

You could try to define 2 variables x1 and x2 as the solution. x1 is an integer that assumes either 0 or 1 and x2 corresponds to...

4 månader ago | 0

| accepted

Genetic Algorithm 'bitstring' not accepting constrains

Considering this hint in the documentation, you should use the integer condition for the corresponding variables and set the lim...

mer än ett år ago | 0

Question

How to choose between different licenses in MATLAB Online?

Im taking part in some online courses using Matlab. For this courses there is a license for Matlab online to work through the co...

mer än ett år ago | 2 answers | 1

### 2

answersBar plot for two matrices together

https://de.mathworks.com/help/matlab/ref/bar.html?searchHighlight=bar&s_tid=srchtitle_bar_1#bug9u7m-1 Every column stands for a...

mer än ett år ago | 0

How to plot an oscillator?

You can plot it 2 ways - i dont know what is "correct" for your case... For me both are correct - depending on what you want to ...

mer än ett år ago | 0

| accepted

How can I solve in the error?

%clear all, clc; % clear all memory and variables x = linspace(-1,1); % create linear spacing in x-direction y = linspace(...

nästan 2 år ago | 0

calculate and fill an area between a line and a curve

A similar discussion here: <https://de.mathworks.com/matlabcentral/answers/1870667-i-got-the-problem-with-polyshape-please-help...

nästan 2 år ago | 0

| accepted

Can someone help me with the representation of the signals?

|*plot*| can not show one single point. Use at least 2 points for w to get a plot - or use |*scatter*|. w=0:10:500; To ...

nästan 2 år ago | 1

Function definitions are not permitted in this context.

https://www.mathworks.com/matlabcentral/answers/467833-error-function-definitions-are-not-permitted-in-this-context?s_tid=srchti...

nästan 2 år ago | 0

Receiving two outputs in function

To get multiple outputs from a function, you have to call it with multiple output arguments: [MY_nodeCrd,MY_edgeList]=ReadInput...

nästan 2 år ago | 1

why do I receive syms requires Symbolic math tool box

"why do I receive syms requires Symbolic math tool box?" - Simple: Because syms is part of the symbolic toolbox. If your license...

nästan 2 år ago | 1

| accepted

Answer double pendulum question usinf Rung-Kutta

Have a read here: <https://de.mathworks.com/help/symbolic/animation-and-solution-of-double-pendulum.html>

nästan 2 år ago | 1

| accepted

equation for projectile motion

This might be helpful: <https://de.mathworks.com/matlabcentral/answers/431384-write-a-script-which-will-calculate-the-trajectory...

nästan 2 år ago | 0

curve fitting using min-max optimization

You might want to start reading and trying here: <https://de.mathworks.com/help/curvefit/curvefitter-app.html>

nästan 2 år ago | 0

I got the problem with polyshape, please help me

You have to take both points into account to find a closed region: xcut1 = fzero(@(x)sqrt(x).*(12-x)./2 - 2+x, 0.5); xcut2 = f...

nästan 2 år ago | 0

| accepted

Solve non-linear systems of equations to create matrix of coeffients and solve variable

If i assume, that you have a linear system, because i think, that x1...x4 does not mean x^1...x^4 then you are nearly there: sy...

nästan 2 år ago | 0

Find light grey circle in greyscale image

Maybe this is an approach: img = imread('BinarizedImage_NewImage.JPG'); img2 = img; img2(img2<240) = 0; imshowpair(img,img2,...

nästan 2 år ago | 1

| accepted

Solving cubic equation with imaginary numbers

s1 = 133.9457 + 253.416i; s2 = 133.9457 - 253.416i; s3 = 1339.457; syms s x_exactly = solve(0.00017493*(s-s1)*(s-s2)*(s-s3...

nästan 2 år ago | 0

| accepted

combing rows into one row

I assume you want to have all values in a row vector: YouWant = reshape(MeanTemp(2:end,2:end),1,[]);

nästan 2 år ago | 0

How can I mark a region in matlab ?

x1 = 0:0.001:1; y1 = x1.^2; y2 = 1 - x1; xcut = fzero(@(x)x.^2 - 1+x, 0.5); x = [x1(x1<=xcut), x1(end)]; y = [x1(x1<=xcut)....

nästan 2 år ago | 0

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Change plot scale y axis

u21=[224 224 224 223 218 218 217]; beta1=[0 0.19 0.26 0.38 0.76 0.83 0.9]; plot(beta1,u21,'-*'); xlabel('beta') ylabel('U[V]...

nästan 2 år ago | 1

Taking derivative and putting it equal to 0 to find theta.

syms s h S(x) fun = S(x) == (6*s*h) - ((3*s*s*cot(x))/2) + ((3*s*s*sqrt(3)*csc(x))/2) sdot = diff(fun,x) == 0

nästan 2 år ago | 0

How to get the R2 value of fit?

ft = fittype('b*x^2+c*x+a'); load enso [curve, gof]=fit(month,pressure,ft,'StartPoint',[1,3,5])

nästan 2 år ago | 0

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why is my code not working?

v=[2;0;1;9;0;1;3;0;1]; m=max(v); n=mean(v); f=@(x) m-(1/2).*x; % Vectorized g=@(x) 2.*x.^2-n; % Vectorized figure ezpl...

nästan 2 år ago | 0

Finding out the minimum value position of a matrix

a=[1 2 3 4 5 10;2 3 5 6 1 12;2 6 4 5 7 16;10 2 1 4 5 20;2 3 1 4 9 12] % Here for the example row = 5, col = 1...3 ii = 5; % wa...

nästan 3 år ago | 0

Automatically fit a circle on an arc in image and to plot the circle in the image.

This example from the documentation appears to be suitable for your case.

mer än 3 år ago | 0

MaxFunctionEvaluations not working in optimset() for fsolve()

See the documentation:

mer än 3 år ago | 1

| accepted

Generation of a pair of random numbers satisfying a constraint

N = 10; r = sort(rand(N,2),2)

mer än 3 år ago | 0

| accepted

Dimensions of arrays being concatenated are not consistent.

clc; clear all; close all; %% Parametri %% Inercija; {kg.m2} Juc = 2.6e-2; Jlc = 1e-3; %% Kruto...

mer än 3 år ago | 0

| accepted