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Matt J


Last seen: Today Con actividad desde 2010

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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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Respondida
How to get legend entrie from existing figure ?
The legend's String property will get you the legend labels for the different lines, e.g., plot(rand(5,3)); L=legend; L.Stri...

alrededor de 13 horas hace | 0

| aceptada

Respondida
App Designer component generated by code not displaying
It is conspicuous to me that you are complaining about missing labels, but not about the missing uipanel!. Did you pre-populate ...

alrededor de 13 horas hace | 0

Respondida
What is causing this intermittent error in parfor?
If you add the indicated line, your class constructor will support no-argument calls, and the error will go away: funct...

1 día hace | 0

| aceptada

Respondida
Defining inequality constraint A*x <= b for genetic algorithm
You should be able to vectorize the computations in your self-intersection checker (within your nonlinear constraint function). ...

2 días hace | 0

Pregunta


Why does fprintf attach a negative sign to a zero?
Here is some code to set up the demonstration, load data fid = fopen('runsim.py','w'); rotation=[0,0,-GantryAngles(1)]; ...

5 días hace | 3 respuestas | 0

3

respuestas

Pregunta


Closing the Property Inspector in R2025b
The Property Inspector pane does not appear to have a 'Close' button in R2025b, nor does its sidebar icon appear to have a dropd...

8 días hace | 1 respuesta | 0

1

respuesta

Respondida
confidence interval from lsqnonlin function while retaining constraints
After solving the original problem, initialguess = [3,25.5013,0.5,-0.8793]; %[n,tau(fs),m,c] options = optimoptions('lsqnonlin...

8 días hace | 0

Pregunta


Pinning the AxesToolbar (revisited)
The AxesToolbar was introduced about 6 years ago, However, I never embraced it, because it wa...

9 días hace | 1 respuesta | 3

1

respuesta

Respondida
How can I move the find & replace window or get it to automatically close
If you widen the Editor window sufficiently, the Find and Replace window will move to the right into a blank area where it will ...

10 días hace | 0

| aceptada

Pregunta


Mixing subscripts with linear indices
Generally speaking, I have found that it has always been possible to mix subscript and linear array indexing, as long as the ind...

11 días hace | 1 respuesta | 0

1

respuesta

Respondida
effects of ifft2(x, 'symmetric') while x is not conjugate symmetric
When you specify "symmetric", the upper half of the fft input array is ignored, e.g. x=ones(1,7); ifft(x) x(5:end)=rand(1...

17 días hace | 1

| aceptada

Respondida
The single function is not behaving as expected
No, it is not a bug. The precision of a number isn't something that is measured only by the digits to the right of the decimal p...

19 días hace | 3

| aceptada

Respondida
Integer conversion without precision loss for literal function inputs
test 7725400999518902274 function test(a) arguments a (1,:) string end a=eval("uint64("+ a + ")"), end

20 días hace | 1

| aceptada

Respondida
FFT problem: FFT -> some manipulation -> IFFT results in one-element shift
I think the line where I define my frequency: f= ((-length(fourierNoise)/2):((length(fourierNoise)/2)-1))*fs/length(fourierNois...

21 días hace | 0

Respondida
Free boundary of a tetrahedral mesh has interior-crossing edges
OK, my bad. The solid was built from smaller, triangular sub-prisms, each subsequently split into tetrahedrons. While neighborin...

21 días hace | 0

| aceptada

Respondida
Can we specify or make uigetfile() remember its window position or view mode/sorting?
This file exchange submission seems to do most of the above, https://www.mathworks.com/matlabcentral/fileexchange/10867-uipickf...

22 días hace | 0

Respondida
Table with multiple types
I guess I might be missing something. Why isn't this what you want? PType='R'; PData=uint32(391); fig = uifigure; uit = ui...

22 días hace | 0

Respondida
How to move data tip in R2025b? (Or, how to restore legacy data tip behavior)
Another option is to supply your own datatip, with an UpdateFcn defined by you: function datatipDemo() % Minimal example that ...

22 días hace | 0

| aceptada

Respondida
How to move data tip in R2025b? (Or, how to restore legacy data tip behavior)
You can activate the old-style figure toolbar exploration buttons, e.g., addToolbarExplorationButtons(gcf) That seems to have ...

23 días hace | 0

Respondida
Error using assignin in a nested m function
Assignin is something you should generally try to avoid. It has many hazards. In this case, where myfunction is nested in mywo...

25 días hace | 1

Pregunta


Migrate R2025a preferences to a new computer that is running R2025b
I am installing R2025b Matlab on a new computer. The new computer has no prior Matlab installations from which previous preferen...

26 días hace | 1 respuesta | 1

1

respuesta

Pregunta


As of R2025ab, are all figures now uifigures?
Prior to R2025, the result of the code below was tf=0. Have the figure and uifigure frameworks been unified somehow? Is that why...

26 días hace | 1 respuesta | 1

1

respuesta

Respondida
Imtile resolution changes with figure height
So Ive noticed when y figure is 1500 x 600, the images look a lot better than when the figure is only 300 high - even though wit...

26 días hace | 0

| aceptada

Respondida
Where did the zoom icon and other tools go in Release 2025b?
In the version I had installed previously, there was a "zoom" button shaped like a small magnifying glass in a toolbar along wit...

26 días hace | 1

| aceptada

Respondida
How can I measure the pixel size
If you know the real world distance D (e.g. in millimeters) between two points on the PCB, and if these points are N pixels apar...

26 días hace | 0

| aceptada

Respondida
Find roll, pitch, and yaw from the same vector in two different coordinate systems
So this is a system of equations with three equations and three unknowns, so there should be sufficient information. No, there ...

27 días hace | 0

Pregunta


Free boundary of a tetrahedral mesh has interior-crossing edges
I have the following tetrahedralized solid, a right prism with a non-convex base, load data %Solid display tetramesh(TET,'F...

28 días hace | 1 respuesta | 0

1

respuesta

Respondida
Value to differentiate is not traced. It must be a traced real dlarray scalar. Use dlgradient inside a function called by dlfeval to trace the variables.
rawOut = extractdata(rawOut); dY8 = extractdata(dY8); dY18 = extractdata(dY18); If you pre-convert all your input...

28 días hace | 0

Respondida
Why the optimization results of lsqnonlin are different in R2026a and R2025a?
There appears to be a new (and buggy) implementation of expm.m in R2026a, resulting in incorrectly complex results for skew sym...

29 días hace | 1

| aceptada

Respondida
Quick substitution of all multi-objective optimization results (gamultiobj) into optimization expressions
Obviously I can build a loop over ii to get an array Mval, but is there a way to do it more elegantly? Doesn't seem it like it....

alrededor de 1 mes hace | 0

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