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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 ...

6年以上前 | 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'; ...

6年以上前 | 1

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

6年以上前 | 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...

6年以上前 | 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...

6年以上前 | 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 ...

6年以上前 | 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....

6年以上前 | 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.

6年以上前 | 0

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

6年以上前 | 0

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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))...

6年以上前 | 0

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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,...

6年以上前 | 0

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

6年以上前 | 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...

6年以上前 | 0

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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; ...

6年以上前 | 0

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

6年以上前 | 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);

6年以上前 | 0

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wo kann ich das R2018b runter laden, eine Matlablizenz habe ich
<https://de.mathworks.com/downloads/web_downloads/select_release?mode=gwylf>

6年以上前 | 1

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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))...

6年以上前 | 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...

6年以上前 | 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 <...

6年以上前 | 0

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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

6年以上前 | 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...

6年以上前 | 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 ...

6年以上前 | 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...

6年以上前 | 0

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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...

6年以上前 | 2

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Create a matrix that stores rows that are not from a random sample
A way smarter is using the ismember function - here is an example - all you need ist the last line, the first two lines are just...

6年以上前 | 0

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how to Conversion transfer function to state space ...MIMO help me
<https://de.mathworks.com/help/control/ref/ss.html?s_tid=doc_ta#f4-373013 Convert Transfer Function to State-Space Model>

6年以上前 | 0

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Ode45 change of a value in the equations
Do 2 calls of ode45. The first from tspan=[0 365]. Then use the final result from this as initial condition for the second call ...

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how can i code energy balance eq in matlab
There is an analytical solution found by dsolve: syms T_Co(t) T_Ho(t) M_C M_H T_Ci T_Hi rho_C rho_H V_C V_H UA_i C_Pmc C_Pmh ...

6年以上前 | 1

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Reading file with pilcrow (paragraph) sign
This should help: >> A = '09.10.2019¶' A = '09.10.2019¶' >> A(end) = [] A = '09.10.2019' also maybe hel...

6年以上前 | 1

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