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...

7 days ago | 0

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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...

7 days ago | 1

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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...

8 days ago | 0

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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 ...

8 days ago | 0

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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'; ...

9 days ago | 1

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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)

9 days ago | 0

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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...

10 days ago | 1

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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...

10 days ago | 0

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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 ...

10 days ago | 0

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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....

11 days ago | 1

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

11 days ago | 0

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

11 days ago | 0

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))...

13 days ago | 0

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,...

16 days ago | 0

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

16 days ago | 0

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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...

17 days ago | 0

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; ...

17 days ago | 0

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

19 days ago | 0

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

21 days ago | 0

wo kann ich das R2018b runter laden, eine Matlablizenz habe ich

21 days ago | 1

Why does this for loop fail?
|vpasolve| may find more than one solution. Try to save your results in a cell array: ... Vrange = cell(1, length(Trange))...

25 days ago | 0

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How to use fsolve with a variable parameter?
Define the values fot T21 that you want to calculate for. Then use a for loop and call your function inside the loop as often as...

25 days ago | 2

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How to extract diagonal line data from image
The result for every line object contains an information about the angle of the line. This information can be used as input to <...

25 days ago | 0

logspace equivalent and sin(x) [solved]
x = 10.^(1:3) % x=logspace(1, 3, 3) result = sum(A>0.5) % Number of elements in A bigger than 0.5

25 days ago | 1

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coding error ode45
If possible try to avoid global variables: %define parameters %x is the number of cancer cells x0 = 1000; % c2 is the number...

25 days ago | 0

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Remove noise from screw image
Replace the medfilt2 by a gaussian blur using imgaussfilt: %% read image and find points that should lie on a straight line A ...

25 days ago | 1

Detect orientation of screw image
Using this script lets you know which angle to rotate. Then use this information to rotate the image and check the orientation a...

25 days ago | 1

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Multiple output values on an if else loop
in every run of your loop you overwrite WeightF. Use indexing to avoid this: WeightF(i) = ... also using i for loop count is n...

25 days ago | 0