Matt J

Last seen: Today | Aktiv seit 2009

Followers: 6 Following: 0

Nachricht

Professional Interests: medical image processing, optimization algorithms PLEASE NOTE: I do not read email sent through my author page. Please post questions about FEX submissions in their respective Comments section.

Statistik

All

Abzeichen anzeigen

Feeds

Beantwortet
How can I calibrate a fixed camera to obtain accurate measurements of objects at different distances, despite height variations and pixel distortion?
You cannot determine the size of the object from a single camera without knowing its distance from the camera. You would need tw...

etwa 11 Stunden vor | 0

Beantwortet
Setting bounds for constants in a fit() object in terms of other constants in the fit object
As a more indirect approach, instead of fitting, y=A*log(B*x-C) %D has been deliberately removed - it is unnecessary you coul...

3 Tage vor | 0

Beantwortet
1D gaussian filter for A-scans (OCT)
See imgaussfilt, e.g., A=zeros(1,11); A((end+1)/2)=1 B=imgaussfilt(A,1.2)

4 Tage vor | 0

Beantwortet
Finding zeros of intersection of the "x-axis" - Error using "fzero"
tic close all; clc; % For the region k_o < k_p < sqrt(u_r*e_r)*k_o % Wavelength value lambda lambda = 1; % Wavenumber...

5 Tage vor | 0

| akzeptiert

Beantwortet
Why are the gradients not backpropagating into the encoder in this custom loop?
In terms of what may be different from trainnet, I don't see any regularization in your customized loop. You have a function cal...

6 Tage vor | 0

| akzeptiert

Beantwortet
How to define a slicing like x(i).property in a custom class?
function varargout = subsref(this, s) switch s(1).type case '()' ...

8 Tage vor | 0

| akzeptiert

Beantwortet
GPU memory usage for Hadamard product
This is just a guess, but possibly the GPU memory is fragmented. I.e., maybe your available 28GB is broken into blocks that are ...

8 Tage vor | 0

Beantwortet
Loop data in both x and y direction, and do linear fit of each y at each x
t = 15:15:1440; %time MSD=readmatrix('MSDdata.xlsx'); A=t.'.^[1,0]; slopes=nan(size(MSD)); for i=1:height(A) tm...

11 Tage vor | 0

| akzeptiert

Beantwortet
Loop data in both x and y direction, and do linear fit of each y at each x
Perhaps this is what you want. matrix1=rand(96,1); matrix2=rand(96,150); [Xslope,Tslope]=gradient(matrix2,1:150,matrix1); ...

11 Tage vor | 0

Beantwortet
"tighter" tile spacing and uniform tile height using tiledlayout?
You could also play with the tilespan: % Create tiled layout tiledlayout(1,305,'TileSpacing','none','Padding','none'); % I...

11 Tage vor | 1

Beantwortet
"tighter" tile spacing and uniform tile height using tiledlayout?
One option would be to download subaxis, as an alternative to tiledlayout. s=.01; % Image A subaxis(1,3,1,'SpacingHoriz',s)...

11 Tage vor | 1

Beantwortet
How can I use the data of a set of matrices labelled in order
data_1=10; data_2=20; data_3=30; data_4=40; data_5=50; Data=arrayfun(@(i)evalin('caller', "data_"+i), 1:5,'uni',0)

12 Tage vor | 0

Beantwortet
Where can I find a good example of using tied weights in nested layers?
The example at your link is for R2024a, but the version of Matlab you are running is only R2023b.

12 Tage vor | 0

| akzeptiert

Beantwortet
Formatting Data in dlarray for Deep Learning Models
You cannot do that, but you shouldn't need to. Because the dimensions are all identified by labels (in this case CBT), trainnet(...

12 Tage vor | 0

Beantwortet
Assigning many cell array entries to same value using index
You should probably be using strings or catgorical arrays instead of cells. Regardless, it is easy to switch back and forth: ce...

13 Tage vor | 1

Beantwortet
Assigning many cell array entries to same value using index
Another way, [cellArray{iHigh}] = deal('High'); [cellArray{iLow}] = deal('Low');

13 Tage vor | 1

Beantwortet
Single struct as alternative to name-value pairs in user-defined function
You would have to use the older inputParser system to do that kind of thing, with the StructExpand property set to true (the def...

13 Tage vor | 1

| akzeptiert

Beantwortet
imregcorr() misaligns images badly
Phase correlation isn't going to be a good algorithm for images of a starry field. I think your best bet is to do landmark extra...

14 Tage vor | 1

| akzeptiert

Beantwortet
Merging different legend labels
One way, x1 = [1, 2 ,3, 4, 5]; y1 = [5, 3, 2.8, 1.7, 1.2]; y2 = [6.5, 4.7, 3.5, 1.9, 1.3]; x2 = [1, 2, 3, 4, 5]; y3 = [6, 5...

14 Tage vor | 0

Beantwortet
Trouble with inheritance i MATLAB OOP
Remove these property declarations from PathParameterFile, properties Path; xmlStruct; ...

14 Tage vor | 0

| akzeptiert

Beantwortet
I have been working on 3D imaging in the form of pixels with spheres in a box and need help in finding out the contact points in between the spheres in the produced pixel data
This assumes SS contains the edge map of the two spheres and nothing else. L=bwlabel( imfill(SS~=0,'holes') ); se=ones(3); ...

15 Tage vor | 0

Beantwortet
The extrinsic function 'perms' is not available for standalone code generation.
Here's an alternative implementation of perms(), suitable for small vectors. Maybe pre-2024b Coder will find it more pallatable....

15 Tage vor | 0

Beantwortet
what type of deep learning network?
It is a feedforward neural network.

15 Tage vor | 0

Beantwortet
Enforce condition in lsqnoneg
Suppose your original problem is, Rewrite the problem by making the change of variables x=Q*z where z>=0 and Q=eye(160...

16 Tage vor | 0

| akzeptiert

Beantwortet
What are the packages I need to select while installing MATALB for suceessfully installing MATLAB runtime.
This might help: https://www.mathworks.com/products/compiler/matlab-runtime.html

19 Tage vor | 0

Beantwortet
Formatting Data in dlarray for Machine Learning Input
XTrain(1:10)={rand(3,540)}; %hypothetical data XTrain=dlarray( cat(3, XTrain{:}) ,'CTB')

21 Tage vor | 0

| akzeptiert

Beantwortet
Using dlarray with betarnd/randg
Random number generation operations do not have derivatives in the standard sense. You will have to define some approximate deri...

etwa ein Monat vor | 0

| akzeptiert

Beantwortet
Degrade image with known MTF to another desired MTF
sfrmat3 is 3rd party code, so nobody here knows what it is doing. I suspect at least part of the problem is that img_blurred is ...

etwa ein Monat vor | 0

| akzeptiert

Beantwortet
Update a value in a struct in another function
You must return the modified myStruct from myUpdate(): myStruct.myLength = 1 myStruct = myUpdate(myStruct) function myStr...

etwa ein Monat vor | 0

Beantwortet
Deep learning numerical regression, no images, custom loss function
I don't know what kind of hidden layer architecture you would want for such an application, but the network below (layer graph a...

etwa ein Monat vor | 0

Mehr laden

Matt J

Statistik

MATLAB Answers

MATLAB Answers

File Exchange

File Exchange

MATLAB Answers

MATLAB Answers

File Exchange

File Exchange

File Exchange

MATLAB Answers

MATLAB Answers

MATLAB Answers

Feeds