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Stephan


903 2017 年以降の合計貢献数

Knowledge means knowing where it is written...

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

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Stephan's バッジ

  • 12 Month Streak
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回答済み
Creating a sequence with repeating numbers
b = repelem(1:430,1,2) or for a column: b = (repelem(1:430,1,2))'

37分 前 | 0

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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...

約4時間 前 | 0

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

約19時間 前 | 0

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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...

約20時間 前 | 0

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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...

約24時間 前 | 1

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

1日 前 | 0

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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...

3日 前 | 1

| 採用済み

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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...

4日 前 | 1

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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...

5日 前 | 0

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

5日 前 | 0

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

5日 前 | 0

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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)

5日 前 | 0

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

5日 前 | 0

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

5日 前 | 0

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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>

6日 前 | 0

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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 = ...

6日 前 | 0

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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))'

6日 前 | 0

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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/...

6日 前 | 0

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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...

6日 前 | 0

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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...

6日 前 | 0

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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;...

7日 前 | 1

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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...

7日 前 | 0

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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*...

9日 前 | 0

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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 ...

9日 前 | 0

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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>

12日 前 | 0

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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...

12日 前 | 0

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

12日 前 | 0

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

13日 前 | 0

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

14日 前 | 0

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