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 ...

6 years ago | 0

| accepted

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'; ...

6 years ago | 1

| accepted

Answered
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 years ago | 0

| accepted

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...

6 years ago | 1

| accepted

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...

6 years ago | 0

| accepted

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 ...

6 years ago | 0

| accepted

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....

6 years ago | 1

| accepted

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

6 years ago | 0

| accepted

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

6 years 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))...

6 years 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,...

6 years ago | 0

| accepted

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

6 years ago | 0

| accepted

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...

6 years ago | 0

| accepted

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; ...

6 years ago | 0

| accepted

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

6 years ago | 0

| accepted

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

6 years ago | 0

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

6 years ago | 1

Answered
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 years ago | 0

| accepted

Answered
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 years ago | 2

| accepted

Answered
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 years ago | 0

Answered
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 years ago | 1

| accepted

Answered
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 years ago | 0

| accepted

Answered
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 years ago | 1

Answered
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 years ago | 0

Answered
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 years ago | 2

| accepted

Answered
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 years ago | 0

Answered
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 years ago | 0

Answered
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 ...

6 years ago | 0

Answered
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 years ago | 1

| accepted

Answered
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 years ago | 1

| accepted