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Stephan


940 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
Accessing the Confusion Matrix Data
doc confusionmat confusionmat gives you a matrix, containing all the informations needed - it can be used also as the Normalize...

6 hours ago | 0

Answered
Continuous and repetitive gaussian random function in matlab
If i understood you correctly, you want to get the same random values every time you run your code. This is reached by the rng f...

7 hours ago | 0

Answered
random (normal, gaussian series data
If you have Statistics and Machine Learning Toolbox: https://de.mathworks.com/help/stats/makedist.html?s_tid=doc_ta#btstdan-2 ...

7 hours ago | 0

Answered
Help with file format conversion please!
% Setup the Import Options and import the data opts = delimitedTextImportOptions("NumVariables", 2); % Specify range and del...

8 hours ago | 0

Answered
how do I substitute all negative values in a vector with a random number between 0 and 2
y(y<0) = 2*rand(1,numel(y(y<0)))

10 hours ago | 0

Answered
Setting an equation equal to another variable (rearranging) in 2012b
syms s t eq = s == 3*5^(1/2)*t sol_t = solve(eq,t) Beginning from 2017a you can use *isolate*.

1 day ago | 1

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Answered
Hello. Is SimPowerSystem available in Matlab 2019a?
The toolbox was changed and the functions are now available in Simscape Electrical.

6 days ago | 0

Answered
Hi! How I can download matlab R2010a?
<https://www.mathworks.com/downloads/web_downloads/select_release?mode=gwylf>

8 days ago | 0

Answered
Saving a graph with edges and nodes
You can not save a workspace object in a *.m-file*. Use a *.mat-file* instead to save your graph. You can load this in other scr...

10 days ago | 0

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Answered
Where can I study more about scripts in Mat Lab.
you might want to look here: <https://de.mathworks.com/learn/tutorials/matlab-onramp.html?s_cid=learn_ONRAMP_BAN>

15 days ago | 0

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Answered
Fit y=m*x into a non lineardata
This forces b to be equal to zero - the value you are interested in is m(1): % Your data x = 0:10; y = [1.5 3 5 7 8 9 13 16 2...

26 days ago | 1

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Answered
automate the transfer of text files iteraton wise
name = "file_1.txt"; filelist = string(zeros(730,1)); diffusion = cell(730,1); for k = 1:730 number = string(k); f...

26 days ago | 1

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Answered
filter string in the string
str = 'this matlab is a good software, it is a version 9.4 which is equal to 2018a' str = char(str); idx = find((uint8(str)>=...

27 days ago | 1

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Answered
Reading Data from txt file with a unique FormatSpec
One way: A = reshape(double(replace(string(readcell('Test.txt')),["[[", "[", "]", "]]"],["", "", "", ""])),[],12) This uses th...

27 days ago | 0

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Answered
Solving a ODE in matlab
ode = @(t,y) y.^2-y.*0.1*cos(2.*t)-0.2*cos(2.*t); t=[0 8]; y0 = -1; [t,y] = ode45(ode,t,y0); plot(t,y)

27 days ago | 2

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Answered
n x 1 array, add row-wise
https://de.mathworks.com/help/matlab/ref/cumsum.html A = [1 3 4 5 3 8 3]' B = cumsum(A)

27 days ago | 0

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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...

28 days ago | 0

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

28 days 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...

28 days 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...

28 days 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...

1 month 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...

1 month ago | 1

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

1 month 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)...

1 month 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...

1 month 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>

1 month ago | 1

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

1 month 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...

2 months 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...

2 months ago | 0

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