Jan

Last seen: 3 days 前 | 自 2009 起处于活动状态

It is easier to solve a problem than to guess, what the problem is. Questions about FileExchange submissions are welcome - get my address from the code. I do not answer mails concerning questions in the forum.

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Why do I keep getting this error for subplot? Am I missing a toolbox or is the code wrong?
Please read the documentation of the command: subplot or doc subplot You call this command like subplot(m,n,p), where m and n...

3 days 前 | 0

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Nested mean function with omitnan
The problem is here: "What I would have expected would be the same as". This is not the way mean('omitnan') is working. So if yo...

4 days 前 | 1

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No out of memory error but matlab crash
It is expected, that creating a bunch of large arrays (1st example) crash an application. You cannot do much gainst it, because ...

4 days 前 | 1

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How can I output a value in an array, exactly as it is.
01 is no valid notation of a number. Numerically leading zeros are not existing. Zeros multiplied by a power of ten are still ze...

4 days 前 | 2

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Unrecognized function or variable 'delta1'.
Exactly as the error message tells you: The variables or function "delta1" is not defined. Then this linemust fail: [x1, y1]=me...

5 days 前 | 0

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Everytime i type in editor window, nothing comes out of the command window.
The editor is a tool to write scripts and functions. You save them as files, which can be called from other scripts or functions...

5 days 前 | 1

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How to assign a name for every result in every iteration by using for loop
This is a really bad idea. Hiding an index in the name of a variable is a complicated method, which requires even more complicat...

6 days 前 | 1

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i have this error and i can't solve it
The error message tells you: "X must have one or two columns". How many columns does your X have? Fs = 16000; % fréquence d'éch...

6 days 前 | 0

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Keep pairs of corresponding elements in 2 vectors based on conditions
orange = [212929;213223;213482;213740;214013;214790]; green = [212765;213301;213822;214090;214240;214426;214941]; [x, s] ...

6 days 前 | 2

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How to create a loop to run my ODE for two sets of data and then store each data set in two cell arrays.
I do not see the problem: Y0 = [3 1 0 0 0] Y1 = [4 2 0 0 0] tspan = 0:0.1:5; [tout{1}, yout{1}] = ode45(@rates, tspan, Y0)...

6 days 前 | 0

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How do you include a mass matrix in ode45?
Simply by a matrix division inside the function to be integrated: dydt = M(t,y) \ f(t,y)

6 days 前 | 0

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Find elemet which are satisfy given condition
Your code is working: x = [1, 401, 400, 500, 10, 300]; x1 = zeros(numel(x), 1); for i = 1:numel(x) if x(i) <= 400 ...

6 days 前 | 0

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Opening different folder in matlab using loop
The %g instead of %d format does what you want: vel = [1 1.5 2]; D1 = "D:\RESULTS\PRISTINE FRESH\OUTPUT_"; for check = 1:3 ...

6 days 前 | 0

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Is it possible to prevent matlab from saving an m-file on "run"?
Of course changes can be taken back by Ctrl-Z easily, such that accidental input are no serious problem. Even the attack of the...

7 days 前 | 0

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Conversion of float to int16
The signals are not related by a linear transformation: The signals look similar, but the int16 version has a downwards trend...

8 days 前 | 0

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Convert them to grayscale. Write a function, convolve, which takes a filter, F, and an image, I, as input and calculates the 2D convolutions of I with F via the use of ‘for’
outImg(i,j) = result; end end end % <== This END closes the function % Load the input image img = imread('Old ...

8 days 前 | 0

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when i run this code it give me error Not enough input arguments. Error in GWO (line 23) Alpha_pos=zeros(1,dim);
The function requires.these input arguments: SearchAgents_no,Max_iter,lb,ub,dim,fobj. How do you define them? If you start the ...

8 days 前 | 0

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What are some recommended strategies for replicating image processing techniques used in FIJI for a 3d tiff stack, such as non-local means filter, in MATLAB?
See e.g.: https://www.mathworks.com/help/images/ref/imnlmfilt.html https://www.mathworks.com/matlabcentral/fileexchange/13176...

8 days 前 | 0

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For loop vectorisation having structure arrays
What is the prupose of a vectorization here? Remember that vectorized code creates temporary arrays usually and this is expensiv...

8 days 前 | 1

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Cannot locate any files
Yes, Matlab Online does not access local files. See e.g. https://www.mathworks.com/matlabcentral/answers/1573628-matlab-online-s...

8 days 前 | 1

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What part of this for loop does not want to work with anything else than positive integers?
rE is a vector: rE = zeros(1,n); You cann address its elements with positive integers as indices: rE(1), rE(2), ... t contain...

10 days 前 | 1

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Error using evalin Undefined function or variable 'var'.
The variable var is created in the workspace of the callback function. It is not visible in other workspaces, e.g. in the comman...

11 days 前 | 1

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Why could matlab not find the appcontainer folder?
Unrecognized function or variable 'rmfield'. It seems like the complete Matlab path is destroyed. Please explain, what has happ...

11 days 前 | 0

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Not Enough Input Arguments: Newtons Method/Jacobian Matrix
You define gradfun with 3 inputs: gradfun = @(x,y,z) ... In the code you call it with 1 input: gradfxk = gradfun(xnew); The ...

11 days 前 | 0

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How to automatically update the value in a string in an edit box with a value in another edit box but still allow the user to overwrite this value?
Without GUIDE but a working demonstration: handles.FigH = figure; handles.Edit1 = uicontrol('Style', 'Edit', ... 'Units',...

11 days 前 | 0

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Permission error for PREFDIR when running a stand-alone application on a different system
If the preferences folder is hardcoded, such problems occur. Search in the code for the name of the folder an replace it by the ...

11 days 前 | 0

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Ways for faster torque interpolation
interp1 is slower than griddedInterpolant. You can created the interpolant outside the integration to save more time. A sever p...

11 days 前 | 0

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How to load a mat. file containing one big matrix
If the variable in the MAT file has more than 2GB, it must have the v7.3 format. You try to extract a 994x961x3346 subarray, wh...

11 days 前 | 0

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Combining masks in 4D matrix
With FEX: RunLength : s = size(mask); mask = reshape(mask, [], s(4)); for k = 1:size(mask, 1) % [EDI...

13 days 前 | 0

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Does dsolve benefit from multiple cores?
Open the TaskManager and look at the CPU usage. Does dsolve use one or all cores? This is a strong hint to decide, if it is mult...

13 days 前 | 1

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