Answered
Finding a circle in a 2D array
load P BW=median(P(:))-P>50; BW=bwpropfilt(bwareaopen(BW,100),'Eccentricity',6,'small'); c=vertcat(regionprops(BW,'Cent...
Finding a circle in a 2D array
load P BW=median(P(:))-P>50; BW=bwpropfilt(bwareaopen(BW,100),'Eccentricity',6,'small'); c=vertcat(regionprops(BW,'Cent...
1 year ago | 1
| accepted
Answered
imerode/imdilate use convolution?
No, imdilate is a sliding window max() operation, which is nonlinear, and therefore not, in general, a convolution. Similarly im...
imerode/imdilate use convolution?
No, imdilate is a sliding window max() operation, which is nonlinear, and therefore not, in general, a convolution. Similarly im...
1 year ago | 0
| accepted
Answered
Take 3x3 nearest neighbours round centroids of all spots and find the median of their mean
sz=size(IM); centroidIdx=sub2ind(sz,y1,x1); T=combinations(1:3,1:3); delta=sub2ind(sz,T{:,2},T{:,1})'-(sz(1)+2); resu...
Take 3x3 nearest neighbours round centroids of all spots and find the median of their mean
sz=size(IM); centroidIdx=sub2ind(sz,y1,x1); T=combinations(1:3,1:3); delta=sub2ind(sz,T{:,2},T{:,1})'-(sz(1)+2); resu...
1 year ago | 0
| accepted
Answered
Take 3x3 nearest neighbours round centroids of all spots and find the median of their mean
movingMean=conv2(IM,ones(3)/9,'same'); centroidIdx=sub2ind(size(IM),y1,x1); result=median(movingMean(centroidIdx))
Take 3x3 nearest neighbours round centroids of all spots and find the median of their mean
movingMean=conv2(IM,ones(3)/9,'same'); centroidIdx=sub2ind(size(IM),y1,x1); result=median(movingMean(centroidIdx))
1 year ago | 0
Question
Displaying a struct containing gpuArray fields takes an extremely long time in R2024b
I find that when I create a struct (or object) whose fields are large gpuArrays, it takes an extremely long time (1-2 minutes) t...
1 year ago | 2 answers | 0
2
answersSubmitted
gaussfitn
Fit N-dimensional scattered points with Gaussian+constant
1 year ago | 2 downloads |
Answered
MINLP problem in MATLAB with both integer constraints and nonlinear equality constraints
If, as @Torsten mentioned, you are in the situation where the equality constraints only depend on the continuous variables, then...
MINLP problem in MATLAB with both integer constraints and nonlinear equality constraints
If, as @Torsten mentioned, you are in the situation where the equality constraints only depend on the continuous variables, then...
1 year ago | 0
Answered
how to use fmincon to optimize a functio with more than one control vector where the control vectors used in constrains also?
Use the problem-based optimization framework to launch fmincon. It will look approximately like, p=optimvar('p',pi,pj); X=opti...
how to use fmincon to optimize a functio with more than one control vector where the control vectors used in constrains also?
Use the problem-based optimization framework to launch fmincon. It will look approximately like, p=optimvar('p',pi,pj); X=opti...
1 year ago | 0
| accepted
Answered
Fit a linear equation to obtain coefficients (constants)
I have a linear equation P = a + bM + c(Y-1) + d(M(Y-1)) where a, b, c and d are coefficients (constants). P, Y and M are known...
Fit a linear equation to obtain coefficients (constants)
I have a linear equation P = a + bM + c(Y-1) + d(M(Y-1)) where a, b, c and d are coefficients (constants). P, Y and M are known...
1 year ago | 1
Answered
MINLP problem in MATLAB with both integer constraints and nonlinear equality constraints
Such problems usually do not have solutions (EDIT: unless the equalities depend only on the continuous variables), since a nonli...
MINLP problem in MATLAB with both integer constraints and nonlinear equality constraints
Such problems usually do not have solutions (EDIT: unless the equalities depend only on the continuous variables), since a nonli...
1 year ago | 1
| accepted
Answered
parallel computing apply to my problem
Skipping the symbolic operations will speed things up, tic; t=linspace(0,0.1,1000)'; tsquared=t.^2; [a...
parallel computing apply to my problem
Skipping the symbolic operations will speed things up, tic; t=linspace(0,0.1,1000)'; tsquared=t.^2; [a...
1 year ago | 0
Answered
Class Property Validation for the Contents of a Cell Array Property?
You can do it, but you would have to define your own validation function, https://www.mathworks.com/help/matlab/matlab_oop/prop...
Class Property Validation for the Contents of a Cell Array Property?
You can do it, but you would have to define your own validation function, https://www.mathworks.com/help/matlab/matlab_oop/prop...
1 year ago | 2
| accepted
Question
Loading user-defined classes from .mat files absent the classdef
At one time, if I had a .mat file with a user-defined class variable, but lacked the classdef file, loading the .mat file would ...
1 year ago | 1 answer | 0
1
answerQuestion
Why does .mat file previewer take so long?
I often wish to preview the contents of a .mat file in the Current Folder browser. Some of my .mat files are quite large, which ...
1 year ago | 1 answer | 0
1
answerQuestion
How do I import my MATLAB path preferences when I install MATLAB on new computers?
I have a new computer with Matlab 2024b newly installed on it and am looking to import preference settings (mainly desktop layou...
1 year ago | 1 answer | 0
1
answerQuestion
Command Window prompt stays in view during Run Section
I find, in R2024b (I haven't checked other versions), then when running sub-sections of code, for example with , the command li...
1 year ago | 1 answer | 0
1
answerAnswered
how to fft2 with dlarray?
You haven't explained the difficulty you are experiencing, but I assume it is that an fft(), but not an fft2() command is availa...
how to fft2 with dlarray?
You haven't explained the difficulty you are experiencing, but I assume it is that an fft(), but not an fft2() command is availa...
1 year ago | 0
| accepted
Answered
Iteratively selecting rotation angle for alingment
Use imregtform if you are aligning images. If you are aligning points, use this, https://www.mathworks.com/matlabcentral/fileex...
Iteratively selecting rotation angle for alingment
Use imregtform if you are aligning images. If you are aligning points, use this, https://www.mathworks.com/matlabcentral/fileex...
1 year ago | 0
Answered
Ensuring Non-Negativity and Constraints Satisfaction in Regression with ReLU in MATLAB
You cannot request that trainNetwork strictly enforce constraining (in)equalities using a constrained optimization algorithm, if...
Ensuring Non-Negativity and Constraints Satisfaction in Regression with ReLU in MATLAB
You cannot request that trainNetwork strictly enforce constraining (in)equalities using a constrained optimization algorithm, if...
1 year ago | 0
Answered
How to stabilize the edge effects in a cubic B-spline?
This FEX file allows you to specify extrapolation conditions on the B-spline coefficients, https://www.mathworks.com/matlabcent...
How to stabilize the edge effects in a cubic B-spline?
This FEX file allows you to specify extrapolation conditions on the B-spline coefficients, https://www.mathworks.com/matlabcent...
1 year ago | 1
Answered
How come fsolve is exceeding evaluation limit?
I don't quite understand the physics of your problem, but I have the impression that x(3:5) are meant to be non-negative. Hence,...
How come fsolve is exceeding evaluation limit?
I don't quite understand the physics of your problem, but I have the impression that x(3:5) are meant to be non-negative. Hence,...
1 year ago | 0
Answered
ellipse fit of xy data
I think the arc is too short to get a good elliptical fit. Why not a circular fit? Qualitatively at least, it looks pretty good:...
ellipse fit of xy data
I think the arc is too short to get a good elliptical fit. Why not a circular fit? Qualitatively at least, it looks pretty good:...
1 year ago | 0
Answered
Why does this special case for associativity of a matrix product with a hadamard product hold true?
It is clear why this happens when n=1, i.e, when A*B is an outer product. But now for arbitrary n, the matrix product can be wri...
Why does this special case for associativity of a matrix product with a hadamard product hold true?
It is clear why this happens when n=1, i.e, when A*B is an outer product. But now for arbitrary n, the matrix product can be wri...
1 year ago | 1
| accepted
Answered
Private/protected properties not suggested by methods in class folder
If this is a bug or oversight, I hope it's resolved soon (or perhaps already is in a release later than 2023b) I actually think...
Private/protected properties not suggested by methods in class folder
If this is a bug or oversight, I hope it's resolved soon (or perhaps already is in a release later than 2023b) I actually think...
1 year ago | 0
Answered
how to crop a binary mask to remove all black pixels while maintaining the largest area of white pixels?
result = regionprops(bwareafilt(mask,1), 'Image').Image;
how to crop a binary mask to remove all black pixels while maintaining the largest area of white pixels?
result = regionprops(bwareafilt(mask,1), 'Image').Image;
1 year ago | 0
Answered
I would like to introduce a new loss function.
If the context is deep learning, then you should be using trainnet, whcih allows you to specify the loss function without any ot...
I would like to introduce a new loss function.
If the context is deep learning, then you should be using trainnet, whcih allows you to specify the loss function without any ot...
1 year ago | 0
Answered
How to load multiple mat file in sequence without natsortfiles?
F=sort("file"+(1:14)+".mat"); F=F(randperm(end)) %Unordered file list [~,is]= sort( str2double(extract(F,digitsPattern)) ...
How to load multiple mat file in sequence without natsortfiles?
F=sort("file"+(1:14)+".mat"); F=F(randperm(end)) %Unordered file list [~,is]= sort( str2double(extract(F,digitsPattern)) ...
1 year ago | 0
Answered
Can I get output data from CNN convolution layer without training?
When not training, it is better to use predict(), rather than forward(). layers = [ imageInputLayer([512 512 3],Normalization=...
Can I get output data from CNN convolution layer without training?
When not training, it is better to use predict(), rather than forward(). layers = [ imageInputLayer([512 512 3],Normalization=...
1 year ago | 0
Answered
How does MATLAB resolve a function handle with multiple levels of indexing
Well, ultimately I think Approach 3 is the only 'correct' one. It appears that when the indexing is one level deep (as in Approa...
How does MATLAB resolve a function handle with multiple levels of indexing
Well, ultimately I think Approach 3 is the only 'correct' one. It appears that when the indexing is one level deep (as in Approa...
1 year ago | 1
| accepted
Answered
Help fixing different sized plots with tiled layout
Since you use imagesc to generate the subfigures, it seems to me that you should be using axis image. tiledlayout(3,3,"TileSpac...
Help fixing different sized plots with tiled layout
Since you use imagesc to generate the subfigures, it seems to me that you should be using axis image. tiledlayout(3,3,"TileSpac...
1 year ago | 1
| accepted