Answered
How to define discrete variables in GA (genetic algorithm)
https://de.mathworks.com/matlabcentral/answers/401059-setup-discrete-values-for-decision-variables-in-optimization-problems

environ 2 mois ago | 0

Answered
Surrogate search with integer parameters
|*intcon*| was introduced to surrogateopt in R2019b. <https://de.mathworks.com/help/gads/release-notes.html>

environ 2 mois ago | 0

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Answered
Accessing value in a cell
Edited because of the comments: a = {'1,65,4,5'} b = str2num(a{:}) b(2)

environ 2 mois ago | 1

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Answered
Passing parameters in boundary value problem using BVP4C
See here: <https://de.mathworks.com/help/optim/ug/passing-extra-parameters.html |*passing extra parameters*|>. I suggest to eith...

environ 2 mois ago | 0

Answered
How to extract frames from a .mp4 video?
outputFolder1=('video'); v1=VideoReader('Clock.mp4'); vid1Frames=read(v1); for frame=1:size(vid1Frames,4) outputBaseFileNa...

environ 2 mois ago | 0

Answered
Plot pixels from 2D boolean array
% your array A = randi(2,101)-1; % the result; R=255*ones(101); G=255*(-A+1); B=255*(-A+1); res = cat(3,R,G,B); ...

environ 2 mois ago | 0

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Answered
Return a value from a table
Quarter = {'Q12019'; 'Q22019'; 'Q32019'; 'Q42019'; 'Q12020'; 'Q22020'; 'Q32020'; 'Q42020'}; QuarterStartDate = ['2019-01-01'; '...

environ 2 mois ago | 1

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Answered
Inserting vertical and horizontal line in bodeplot
xline and yline should work for this purpose. Both functions were introduced with R2018b. If you use an earlier release, just de...

environ 2 mois ago | 1

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Answered
Solving EOM coupled equations using ode45
syms x(t) y(t) eq(1)=diff(y,t,2)==(3/2)*(9.81*sin(y)-diff(x,t,2)*cos(y)); eq(2)=11*diff(x,t,2)+(1/2)*cos(y)*diff(y,t,2)-(1/2...

environ 2 mois ago | 1

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Answered
Array indices must be positive integers or logical values. Error in (line 8) mr(t)=mi-((mi-mf)*(t./tb));
I doubt you want t to have only one point. Also no for loop is needed: mi=2290000; mf=130000; tb=165; t=linspace(6.5,165...

environ 2 mois ago | 1

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Answered
could anyone help me how to combine data in two columns
Res = [A B]

environ 2 mois ago | 0

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Answered
Not able to use ode45 to solve and plot solution to vdp equation
You are missing some things. Looks like a mix of numeric and symbolic calculations, which won't work. But tou have luck - exactl...

environ 2 mois ago | 0

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Answered
How to divide column vector elements in unequal parts against a condition?
Due to different lengths of your daily data you should use a cell array: A = readmatrix('New Text Document.txt'); k_min = mi...

environ 2 mois ago | 1

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Answered
how to solve inequality in matlab R2016a
In 2019b this works by using an assumption: syms x real eqn = (x-1)*(x-2)*(x-3)*(x-4)> 0; S = solve(eqn, x) % Test solutio...

environ 2 mois ago | 0

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Answered
Tspan is not strictly increasing.
Since ode45 uses an automated stepwide control just define the start and the end of your tspan this way: tspan = [0 10]; This ...

environ 2 mois ago | 0

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Answered
Subplot in ODE45
d = [0.20 0.30 0.50]; for ii = 1:numel(d) sol(ii)=ode45(@(t,C)b2(t,C,d(ii)),[0 2],[130 10 5]); t{:,ii}=sol(ii).x'; ...

environ 2 mois ago | 1

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Answered
How to print greek letters like 'ยต' in fprintf to file handle?
fileID = fopen('testFile.txt','w') fprintf(fileID,['16.0', char(181), 'm']); fclose(fileID)

environ 2 mois ago | 0

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Answered
Differential Equation Problem using ode45
[W,Fa] = PBR_Isothermal; % plot results subplot(3,2,1) plot(W,Fa(:,1)) subplot(3,2,2) plot(W,Fa(:,2)) subplot(3,2,3) pl...

environ 2 mois ago | 1

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Answered
problem in optimization by MATLAB using genetic algorithm
Change myFitness.m to: function y = myFitness(x) s = x(1) z = x(3) x = x(2) y = ...YOUR EQUATION HERE end also change thi...

environ 2 mois ago | 0

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Answered
optimixation by genetic algorithm using MATLAB
Get rid of the square brackets - Matlab will interpret this as one input argument of a vectorized function. Therefore it throws ...

environ 2 mois ago | 0

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Answered
Plotting points that pass through y for x,y,z coordinates
Data=[0.345 0.343 0.341 0.339 0.337 %sample x data -0.005 -0.002 -0.00069 0.0015 0.0034 %sample y data 0.284 0....

environ 2 mois ago | 1

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Answered
Time-dependent parameter for ODE system
use interp1 to achieve this - an example of how to do this is here.

environ 2 mois ago | 0

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Answered
plot a mathmatical function
https://de.mathworks.com/help/matlab/ref/fplot.html

environ 2 mois ago | 0

Answered
Intelligent symbolic variable substitution
syms f(x) z(x) fun = f == x^2 + 8*x + 16; % equals (x+4)^2 transform = z == (x+4)^2; subs(fun, rhs(fun), lhs(transform))...

environ 2 mois ago | 0

Answered
Use Splitapply to write multiple files
Here is a small example of how it could work: % some data to play with Gender = ['m' 'm' 'w' 'w' 'm' 'w']'; Age = randi(60,6,...

2 mois ago | 0

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Answered
Find column where one value is NaN
res = find(~isnan(a(1,:)) & isnan(a(2,:))==1)

2 mois ago | 0

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Answered
Solving 2 Trigonometric Equation with 2 Unknowns
You can solve the whole system numeric by using *|fsolve|*: [sol,res]=runfun function [sol,res] = runfun px=387.4162; py...

2 mois ago | 0

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Answered
Solving a differential equation
Hi there were some bugs in this code - see my comments V1=3; Gin=216; alpha=0.5; t1=6; V3=10; tau2=50; Eg=180; tau1=5; ...

2 mois ago | 0

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Answered
How to solve system of 2nd order differential equations using ode45
plot3(t,x(:,1),x(:,3))

2 mois ago | 0

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Answered
summing along 3rd dimension every 10 frames
If A is your matrix: B = sum(reshape(A,32,32,10,[]),3);

2 mois ago | 0

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