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Matt J


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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.

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Submitted


Customized text modification buttons for the Matlab Editor
A pair of functions enabling simple, programmatic modification of Matlab Editor text. These can be used to make customized butto...

18 hours ago | 2 downloads |

0.0 / 5

Answered
Shortcut for zoom tool in figure
You haven't listed the version of Matlab you are using, but in any recent version you do not need to make a toolbar selection to...

19 hours ago | 0

Answered
Transfer shortcuts(favouritecommand) from 2017b to 2022b
Look for the set of .xml files in your prefdir that are NOT highlighted in yellow in the list below. These should be copied ov...

19 hours ago | 0

Answered
How to calculate the average value of a vector in MATLAB?
mean([10,20,30,40,50])

3 days ago | 0

Answered
How deep network designer with neural network fitting
See here for an intro to Deep Network Designer, https://www.mathworks.com/help/deeplearning/gs/get-started-with-deep-network-de...

8 days ago | 0

Answered
How to move selected variables to one side of a symbolic equation
syms c1 c2 c3 c4 c5 c6 c7 syms A B C M N O F eq = c1*A + c2*B + c3*C + c4*M + c5*N + c6*O + c7 == F; vars=[A,B,C].'; %...

9 days ago | 0

| accepted

Answered
How to move selected variables to one side of a symbolic equation
syms c1 c2 c3 c4 c5 c6 c7 syms A B C M N O F eq = c1*A + c2*B + c3*C + c4*M + c5*N + c6*O + c7 == F; vars=[A,B,C]; %se...

9 days ago | 0

Answered
Orientation of Shell grid
Apply a 3x3 rotation matrix R to the tetrahderon which transforms the (0,0,0) to (1,1,1) edge so that it aligns with the z-axis...

10 days ago | 0

Answered
Orientation of Shell grid
Obtain vertices for the complete, non-truncated cylinder Vcyl and the vertices Vtet for the tetrahedron containing it. Then, you...

10 days ago | 0

Answered
How to do a polynomial fit to a dataset with an excluded term
Use mldivide, \ to solve the appropriate linear equations for the coefficients, coefficients=x(:).^[0,1,2,4] \ y(:);

11 days ago | 1

Answered
Count number of true statements in a sequence until false, then check for the next true and repeat
Download this, https://www.mathworks.com/matlabcentral/fileexchange/78008-tools-for-processing-consecutive-repetitions-in-vecto...

18 days ago | 0

Answered
Graphics argument validation for function in parfor loop
Second, is there any way to retain automatic argument validation for an axis object that plays nicely with parfor, in cases wher...

21 days ago | 1

Answered
Non-linear data fit with multiple constants
Though your post's title says the fitting problem is nonlinear, it is actually linear when b and d are known, and so has a simpl...

26 days ago | 1

Answered
Memoize an anonymous function with externally scoped variables
One solution is to rebuild the anonymous function inside the memoized function using a container class: mf=memoize(@subfunc); ...

27 days ago | 0

Question


Memoize an anonymous function with externally scoped variables
I am trying to memoize a function that takes an anonymous handle with an externally-scoped parameter as input. The problem is th...

27 days ago | 3 answers | 0

3

answers

Answered
Is there a way to insert a common ylabel to secondary axes in a tiled layout?
t = tiledlayout(2,2); for i = 1:4 f = figure(1); ax = nexttile; yyaxis left x = (1:10); y = rand(1,10)...

1 month ago | 0

Answered
How does Matlab interact with custom Diffusion models?
From what I've read, simple diffusion U-Nets are well within Matlab's reach. For very advanced models like LDF-VFI, Matlab can d...

1 month ago | 0

Answered
transfer learn without losing old memoy YoloX
Continual learning is a serious research topic.There are no off-the-shelf tools in Matlab to do it in a sophisticated way. You w...

1 month ago | 0

| accepted

Answered
How to flatten an image and find dimensions?
Find the 4 vertices of the outer ellipse (i.e., the end points of the major and minor axes). This can be done manually with draw...

1 month ago | 0

Answered
help with XYZ data file
This might be what you're looking for: zq=fspecial('gaussian',200,40); Nlevels=5; zRanges=linspace(min(zq(:)) ,max(zq(:))...

1 month ago | 0

Answered
help with XYZ data file
First question, I would like to be able to plot some of the planes of XY with fixed Z values/range. The terminology "planes of...

1 month ago | 0

Submitted


Quadratic minimization with norm constraint
Minimizes convex or non-convex quadratics subject to (in)equality constraint on norm(x)

1 month ago | 3 downloads |

4.5 / 5

Answered
How to find a rotation vector for use in rotate, if the rotation matrix is rank deficient?
Probably easier to use hgtransform, which allows you to perform the rotation by specifying only the rotation matrix.

1 month ago | 0

Answered
Find specified number of points on curve with identical chord length (not arc length)
Here's an approach using fminbnd to minimize the attached cost function circleMarch(). t=linspace(0,200,1e4)'; %%% XY=[cosd...

1 month ago | 0

| accepted

Answered
How to use custom YOLO models in MATLAB?
If you have the Deep Learning Toolbox, you can use minibatchpredict.

1 month ago | 1

Answered
How to remove unwanted double image in plot
It is possible your points are not sorted in ascending order of x.

1 month ago | 0

| accepted

Answered
How can you make multi-line axis labels with TeX not left-justified in R2026a?
Here's an attempt using the idea of separate text boxes that you mentioned. It wasn't too bad, although, it doesn't have the abi...

2 months ago | 0

Answered
How can you make multi-line axis labels with TeX not left-justified in R2026a?
xlabel({'normal'; '\textbf{bold}'}, ... 'Interpreter','latex')

2 months ago | 0

Answered
How to find a function in the path - securely?
Perhaps as follows? safeWhich('num2cell') safeWhich('varargin') safeWhich('R') safeWhich('p') safeWhich('queryName') ...

2 months ago | 1

| accepted

Answered
Colorbar with background image
You can use this as a template: % Create sample data [X,Y] = meshgrid(linspace(-3,3,200)); A = exp(-(X.^2 + Y.^2)); ...

2 months ago | 0

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