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Feeds
Preconditioning in fmincon
I would like to know if there is a way to pass a specific preconditioner. I have in mind a diagonal matrix D. Unless I am mist...
19 days ago | 2
| accepted
How can I fit data to a piecewise function, where the breakpoint of the function is also a parameter to be optimised?
You can also parametrize the model function directly in terms of the break point coordinates (xbreak, ybreak) and two curvature ...
25 days ago | 0
Reading JSON struct from file adds prefix 'x' to fieldname if it starts with number
Note that I cannot affect to the JSON files how they are originally written. It is easy enough to write a function to modify th...
2 months ago | 1
making a custom way to train CNNs, and I am noticing that avgpool is SIGNIFICANTLY faster than maxpool in forward and backwards passes…
As @Matt J says, it may be worthwhile to make customized pooling layers specifically for the case of tiled pools. However, it mi...
2 months ago | 1
Help with Plotting the Envelope of a Scatter Plot in MATLAB
load xy x=x(:)/1000; y=y(:); r=median(diff(unique(y))); shp=alphaShape([x,y],r*.8); [~,P]=boundaryFacets(shp); sc...
3 months ago | 1
Combining one matrix into another that are of different sizes
n=36; V = [0 1 0 0 0 0; -1 0 0 0 0 0; 0 0 1 0 0 0; 0 0 0 0 1 0; 0 0 0 -1 0 0; 0 0 0 0 0 1]; ...
3 months ago | 1
Problem with mesh grid and intersection of two surfaces
Effectively, I want to develop a mapping from (a, b) to the roots If so, then @Matt J already told you what you are doing wrong...
3 months ago | 0
| accepted
How to undock windows by deafult?
But it only works inside a script, but not in other scripts Once you run it in one script, the effect will persist for the enti...
3 months ago | 0
Focus doesn't switch from editor to command window when runnning m file R2025A
commandwindow input('Something')
3 months ago | 0
| accepted
setting current directory using cd from inside .mlapp files
The behavior makes sense to me, though I somewhat disagree with @Matt J. I think launching a .mlapp from the File Explorer is me...
4 months ago | 0
Question
Revert the 2025 Editor taskbar icon
Starting in R2025a, I see that all undocked window types (editor, figures, etc...) have the Matlab membrane logo in their Window...
4 months ago | 1 answer | 3
1
answerHow to convert a column of float or not data into double?
format long source = {'0.12345678987654321', pi,'n/a'}; target = [0.12345678987654321, pi,nan]; output = cellfun( @(c)...
5 months ago | 0
Is it possible to merge excel cells without using actxserver
No, not through writecell. I've heard there are Python libraries that can do it, and there are ways to call Python from Matlab.
5 months ago | 0
Constraint tolerance setting is not working
It is a classic mistake to define the stopping tolerances with optimoptions, but forget to pass them to fmincon, as in - optio...
6 months ago | 0
How can i use symbolic variables in a parallel Computing (parfor)?
Why not simply - Dlu_11_1 = reshape( jacobian(dlU_11, U1) , M*N,N,M);
7 months ago | 0
Regarding deconvoultion using a point-spread function
load('data'); tmp=[flipud(image1);image1]; tmp=deconvwnr(tmp,PSF,0.5); image2=tmp(end/2+1:end,:); figure(), hold on subpl...
8 months ago | 0
| accepted
Differentiating in one direction using FFT2
How about this? It generalizes your original function to let you differentiate along any specified dimension dim for any nD arra...
8 months ago | 1
I have some questions about the example "Denoise Signals with Generative Adversarial Networks"
The helper functions are at the bottom of the page- https://www.mathworks.com/help/signal/ug/denoise-signals-with-generative-ad...
8 months ago | 0
shared colorbar for specific plots in tiledlayout
main(1,1) function main(Boolean1,Boolean2) B=[Boolean1,Boolean2]; Z1 = peaks; Z2 = membrane; if B==[0,0] %#ok<...
8 months ago | 0
| accepted
nargin of optional arugments
func(1,arg2=3,arg3=5) function func(arg1,names,values) arguments arg1 = 1 end arguments (Repeating)...
9 months ago | 0
| accepted
Setting global variables independently on each worker for parallel computation
i am not looking for the variable to be assigned globally across all workers but to be assigned globally within each local worke...
9 months ago | 0
Why are these zeros adding themselves to the array?
ex1=[2.0000 2.5000 0 2.7083 0 2.7181 0 0 0 2.7183] ex1=nonzeros(ex1)'
9 months ago | 0
fminunc step size too small
The solution I have found is to provide the function with my own calculated gradient and manually multiplying it by 1e6. That m...
9 months ago | 0
Convert Set of (x,y) Coordinates Into Polygon
load coordinates shp = alphaShape(coords(:,1),coords(:,2),'HoleThreshold',50); [~,P]=boundaryFacets(shp); chull=convhul...
9 months ago | 0
How do I set up fmincon correctly for parallel computation? "Supplied objective function must return a scalar value"
There are other acceleration strategies that may be superior to parallelization. I notice in your examples that the in1,in2 pai...
9 months ago | 0
Complex multiplication giving incorrect result
You can also pre-sort - A = 1.0e+08 *[-1.1051 + 0.0000i , -0.4594 + 1.8182i, -0.4594 - 1.8182i, -0.2933 + 2.8161i , -0.2933 ...
9 months ago | 0
define an objective function with user defined number of variables in fminunc()
In the narrow case where your fun is always going to be an anonymous function of x, you could do this - xmin=problem( @(x) x...
9 months ago | 0
Deconvolution of two different Gaussians
Is it possible to deconvolve the resultant in such a way that I see espread? Since you deconvolve y by espread, of course you w...
9 months ago | 0
Command Window prompt stays in view during Run Section
A simple way to get rid of it, I find, is to just execute any command at the prompt even a trivial one like a single number. For...
10 months ago | 0
| accepted
