Community Profile

photo

Stephan


903 total contributions since 2017

Knowledge means knowing where it is written...

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

Contact

Stephan's Badges

  • 12 Month Streak
  • Guiding Light
  • Introduction to MATLAB Master
  • Thankful Level 2
  • Knowledgeable Level 4
  • Revival Level 3
  • Speed Demon
  • Creator
  • First Answer
  • Commenter
  • Promoter
  • Solver

View details...

Contributions in
View by

Answered
Creating a sequence with repeating numbers
b = repelem(1:430,1,2) or for a column: b = (repelem(1:430,1,2))'

3 jours ago | 1

Answered
How to read whole image dataset, and how to resize all images at once?
I suggest to read about <https://de.mathworks.com/help/matlab/ref/matlab.io.datastore.imagedatastore.html ImageDataStore> and re...

3 jours ago | 0

Answered
4 non-linear differential equations with ODE45
working scripts: %% V�rdier % parametre: % Carrying capacity k1 = 500; k2 = 600; k3 = 700; % De incubated males and ...

4 jours ago | 0

Answered
How do I solve for three unknown parameters using only one constraint equation?
you should rewrite your function as *f=d(P)* with known constants (*R*) and use <https://de.mathworks.com/help/optim/ug/lsqcurve...

4 jours ago | 0

Answered
How to save a variable from an anonymous function?
for nonlcon it's not necessarily an anonymous function that is needed. you can also use a "normal" function, so that you can sav...

4 jours ago | 1

Answered
Reshape Matrix Size Marlab
<https://de.mathworks.com/help/comm/ref/bi2de.html>

5 jours ago | 0

| accepted

Answered
problem finding the coordinates of point in stainer tree problem by brute force
your if is ending 3 lines to early. No matter what happens, you get a = x(end) and b = y(end). the m you get is the last that fu...

7 jours ago | 1

| accepted

Answered
GA with integer constraints
The genius answer is given in the documentation of ga: https://de.mathworks.com/help/gads/mixed-integer-optimization.html#bs1ci...

7 jours ago | 1

Answered
Calculate Area of 3D points
If all points on a plane are in 3D space, you could create a polyshape object by using <https://de.mathworks.com/help/matlab/ref...

8 jours ago | 0

Answered
How will I reduce the time it takes to calculate data?
<https://de.mathworks.com/help/matlab/performance-and-memory.html>

8 jours ago | 0

Answered
How to solve delayed reaction diffusion equations by Mathlab?
<https://de.mathworks.com/help/matlab/delay-differential-equations.html?s_tid=CRUX_lftnav>

8 jours ago | 0

| accepted

Answered
what functionalDerivative returns is a 1*1 symfun, not a vector
syms u(x) v(x) H = u^2*diff(v,x)+v*diff(u,x,x); D(1) = functionalDerivative(H,u) D(2) = functionalDerivative(H,v)

8 jours ago | 0

| accepted

Answered
Clustering data into specific range
check out the data type <https://de.mathworks.com/help/matlab/ref/categorical.html categorical>

8 jours ago | 0

| accepted

Answered
How to define binary variables in an optimization problem?
usually you set them to be integers and bound them between 0 and 1

9 jours ago | 0

Answered
How can I solve a system of ODEs with boundary conditions
<https://de.mathworks.com/help/matlab/boundary-value-problems.html?s_tid=CRUX_lftnav>

9 jours ago | 0

| accepted

Answered
How do i merge graphs in bvp4c format ?
hold on for k = 1:4; Ha = k; init = bvpinit(linspace(-1,1,20),[0 0]); sol=bvp4c(@(x,y)rhs_bvp(x,y,Ha),@bc_bvp,init); x = ...

9 jours ago | 0

Answered
I have a multi dimension matrix (:,:,:) that I need to export to excel
If it would be acceptable to have all matrices in one excel sheet, you could use: A = (reshape(your_matrix,5,[],1))'

9 jours ago | 0

Answered
I have 100 data scattered across 100 X 100 size plot. I need to partition the plot into four sub-sections across the center. Can anyone help me.
starting from R2018b you can use <https://de.mathworks.com/help/matlab/ref/xline.html xline> and <https://de.mathworks.com/help/...

9 jours ago | 0

| accepted

Answered
how to make loop in
%km = 72x1 (matrix) x = zeros(25,1); % preallocate for x=1:25 cx(x) = Km(x,1)+Km(x+1,1)+Km(x+6,1)+Km(x+7,1)+Km(x+36,1)+Km(x...

9 jours ago | 0

| accepted

Answered
Are the operators like " .* ", " ./ " won't work in simulink?
It is a parameter: <https://de.mathworks.com/help/simulink/slref/product.html#brofebg> <https://de.mathworks.com/help/sim...

9 jours ago | 0

| accepted

Answered
solving two symbolic equations simultaneously
syms x y a b eq1=a==x+y; eq2=b==x-y; [xsol,ysol]=solve([eq1 eq2],[x y]) sol.x sol.y or: syms x y a b eq1=a==x+y;...

10 jours ago | 1

| accepted

Answered
Function definitions are not permitted in this context
Add the missing end after line 148 (from your outer while loop) to get rid of this error. This end is missing, so Matlab...

10 jours ago | 0

Answered
how to solve these equations
for only real solutions: syms a b c d real eq(1) = a^2+b*c==-1; eq(2) = a*b+b*d==1; eq(3) = a*c+c*d==-1; eq(4) = d^2+b*...

12 jours ago | 0

Answered
how to get combination of elements in a matrix in pair order
A=[3 5 6 7 8]; b = nchoosek(A,2) b = 3 5 3 6 3 7 3 8 5 6 ...

12 jours ago | 0

| accepted

Answered
Can I using Genetic Algorithm to solve a integer quadratic problem?
<https://de.mathworks.com/help/gads/solving-a-mixed-integer-engineering-design-problem-using-the-genetic-algorithm.html>

15 jours ago | 0

Answered
how to convert .mat file to .m file in matlab R2019a version
You can not convert *.mat to *.m files. The *.mat format saves variables from workspace and the *.m file format saves Matlab cod...

15 jours ago | 0

Answered
Rearranging an equation containing the linsolve function
Residuals = CoefficientsMatrix*A

15 jours ago | 0

| accepted

Answered
sum matrix column to get another matrix
G1 = squeeze(sum(G,2));

16 jours ago | 0

| accepted

Answered
remove Nan from a row vector using if statement only
Datan=ch(~isnan(ch));

18 jours ago | 0

Load more