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Stephan


1,057 total contributions since 2017

Knowledge means knowing where it is written...

Interested in:
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- Improvement of my programming skills

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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,...

5 hours ago | 0

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

10 hours 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...

1 day ago | 0

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; ...

1 day ago | 0

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

3 days 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);

5 days 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>

5 days 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))...

9 days ago | 0

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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...

9 days ago | 2

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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 <...

9 days 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

10 days ago | 1

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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...

10 days ago | 0

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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 ...

10 days ago | 1

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...

10 days ago | 1

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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...

10 days ago | 0

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...

10 days 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>

18 days 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 ...

20 days 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 ...

21 days ago | 1

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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...

22 days ago | 1

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Answered
Coupled differential equation to solve fluids
syms x(t) y(t) x0_t x1_t x2_t y0_t y1_t y2_t r0 r1 r2 f1 = x0_t == (-3+0.2*sin(0.2*t)); f2 = x1_t == (3+0.1*sin(0.1*t)); f3 =...

22 days ago | 1

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Answered
Solve overspecified equation system
If you have symbolic toolbox, use: % This part builds a system to solve with fsolve syms u1 u2 up2 l1 l2 xa ya xpa ypa ap0 x ...

22 days ago | 0

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Answered
Iterate between fixed numbers in an array and store into a matrix.
I suggest to reshape the array to have 250 rows. The most Matlab functions like mean, max, min, sum... work on the columns of an...

23 days ago | 0

Answered
solving an eqn matlab
Another try, after reading a little bit about dde's: [t,y] = delayed; % plot results subplot(3,1,1) plot(t,y(1,:),'LineWid...

23 days ago | 0

Answered
What is the version of Computer Vision Toolbox with Matlab R2019b?
MATLAB Version: 9.7.0.1216025 (R2019b) Update 1 MATLAB License Number: ********** Operating System: Microsoft Windows 10 Home ...

25 days ago | 1

Answered
Using Ode45 to solve differential equation with time dependent variable
% call the nested function [t,dTempdt] = my_assignment; % plot the results plot(t,dTempdt) function [t,dTempdt] = my_assig...

25 days ago | 0

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Answered
DOUBLE cannot convert the input expression into a double array.
During the first run of your loop U=0.0, which can be converted to double in line 144 and stored in SF(1). But in the second run...

26 days ago | 0

Answered
How to get double array from string
>> A = str2num('[1,2,3:6,9,12:15]') A = 1 2 3 4 5 6 9 12 13 14 15

26 days ago | 0

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Answered
subplot of trigonometric function
A = @(x) sin(x); subplot(3,1,1) fplot(A,[1 50]) B = @(x) cos(x); subplot(3,1,2) fplot(B,[1 50]) C = @(x) tan(x); subplot(...

27 days ago | 0

Answered
Trouble with Nested Function - So I am trying to have 'equation1' return the outputs [G, H, K, C] but it doesn't recognize them... why? Any help is appreciated
% Variables to play with L1 = 1; L2 = 3; L3 = 4; L4 = 2.6 theta1 = 15; theta2 = 47.5; omega = 66; % Call your function...

27 days ago | 0

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