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Stephan


923 total contributions since 2017

Knowledge means knowing where it is written...

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

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Answered
help to convert text file symbol into array
Assuming you import this as a string, you could use: a = "4c07b] IF hit state: 5 (S) valid:" b = char(a) c = b(:) which give...

3 hours ago | 0

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Answered
Run a code for several values
Sounds like you might be interested in vectorization.

3 hours ago | 0

Answered
write a function that takes any equation as an input
You might to want to achieve this: % Inputs xvals = 0:0.01:10; fun = @(x) x.^5 + sin(x); % call function res = splinecalc...

4 hours ago | 1

Answered
How to extract specific images from a library of images?
You can construct a string array of the desired file names like follows: exceldata = [0,3,8,12,16,224]; filenames = string(100...

4 hours ago | 0

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Answered
Solving a system of second order differential equations (coupled mass-spring system)
syms X1(t) X2(t) K f m1 m2 Y t EqX1 = diff(X1,2) == K*(X1-X2)/m1; EqX2 = diff(X2,2) == f + K*(X2-X1)/m2; [ODE,Vars] = odeTo...

4 days ago | 0

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Answered
Why INTLINPROG returns non-integer?
load intlinprogfail.mat % file attached intcon = 1:45; [x, ~, flag] = intlinprog(fdummy, intcon, [], [], Aeq, beq, lb, ub); r...

5 days ago | 1

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Answered
How to sort one column of a matrix
B = sortrows(A,-3)

7 days ago | 0

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Answered
comparing the two arrays
x1=[1,2,3,2,0,3,4,3,5,4,5,6,8]; x2=[3,0]; res = zeros(1,numel(x2)); for k = 1:numel(x2) res(k) = sum(ismember(x1,x2(k)...

9 days ago | 0

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Answered
matlab code for lagrange method?
Hint: Answers has a search function. We will not write your code - learn from examples: <https://de.mathworks.com/matlabce...

9 days ago | 0

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Answered
Selecting data in an array based on a logical value array?
<https://de.mathworks.com/help/matlab/math/array-indexing.html#MatrixIndexingExample-3>

10 days ago | 1

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Answered
Optimization of equation with 3 variables
<https://de.mathworks.com/help/optim/ug/fmincon.html>

11 days ago | 1

Answered
check if random numbers( 5x5) generated are greater than (1x5)
Here is an example using <https://de.mathworks.com/help/matlab/ref/gt.html gt (greather than)> and <https://de.mathworks.com/hel...

18 days ago | 0

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Answered
how do i get Matlab compiler for home users?
At the Moment there is no way to get this with a home license. You can only hope that TMW will someday change his policy - or yo...

20 days ago | 0

Answered
how with ode45 order we can solve a switching problem?
<https://de.mathworks.com/help/matlab/math/ode-event-location.html>

22 days ago | 0

Answered
My gamultobj nonlinear constraints are being ignored
Get rid of the <= operators, they make the result of myCon a logical zero vector, which brings trouble. Use this instead, to cal...

22 days ago | 2

Answered
Working with table.
Your_Table_new = Your_Table(Your_Table.Recommeded_Working_Hours >= 3000,:);

23 days ago | 0

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Answered
Function "solve" returns a struct
syms a1 a2 q1 q2 eq = a1*cos(q1) + a2*cos(q1)*cos(q2) - a2*sin(q1)*sin(q2) == 0 sol = isolate(eq,cos(q1)) pretty(sol)

24 days ago | 0

Answered
MATLAB codeto python code conversion
There is no tool to do this in an automatic manner. To do this you can seither do (let) this by hand or you use the free Matlab ...

25 days ago | 1

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Answered
Showing years on x axis graph
<https://de.mathworks.com/help/matlab/ref/xticks.html>

27 days ago | 0

Answered
Read images from different subfolders and create movie from them?!
I suggest to read about the <https://de.mathworks.com/help/matlab/ref/matlab.io.datastore.imagedatastore.html imageDatastore> fu...

27 days ago | 0

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

1 month 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...

1 month 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 ...

1 month 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...

1 month 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...

1 month ago | 1

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

1 month ago | 0

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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...

1 month ago | 1

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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...

1 month 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...

1 month ago | 0

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

1 month ago | 0

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