Matt J

Last seen: Today | Con actividad desde 2009

Followers: 14 Following: 0

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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
Separating intersecting blobs on an image
This uses some tools downloadable from, https://www.mathworks.com/matlabcentral/fileexchange/90762-further-tools-for-analyzing-...

alrededor de 9 horas hace | 1

| aceptada

Respondida
Unrecognized function or variable 'transformerLayer'
I don't see transformerLayer in the documentation anywhere, so I imagine it does not exist, and that you are probabaly running a...

1 día hace | 0

Enviada

Find vertices in image of convex polygon
Estimates the corner points of a pixelated convex polygon having a known number of vertices.

5 días hace | 4 descargas |

5.0 / 5

Respondida
Modifying loss function in neural network to be dependent on previous losses
It would require a custom training loop, https://www.mathworks.com/help/deeplearning/ug/train-network-using-custom-training-loo...

5 días hace | 1

Respondida
Exporting Best Fitness Variables from Surrogate Algorithm
The OutputFcn option gives you access to incumbentX, https://www.mathworks.com/help/gads/surrogate-optimization-options.html#mw...

5 días hace | 0

| aceptada

Respondida
Use more chessboards to get one cameraParameter? (cameraCalibration, estimateCameraParameters)
Each slice of imagePointsAll should contain points from one and only one perspective of the chequerboard. Different slices shoul...

5 días hace | 0

Respondida
How do I find the corner points of an mask
You could download pgonCorners, https://www.mathworks.com/matlabcentral/fileexchange/74181-find-vertices-in-image-of-convex-pol...

5 días hace | 0

Respondida
plot ellipse with given degree range
t = linspace(0,45,100); theta=0; %degrees a=2; b=1; x0 = 0; y0 = 0; N=1000; p=translate( scale(nsidedpoly(N),[a,b]) , x0,...

7 días hace | 1

Respondida
plot ellipse with given degree range
Using this FEX package, https://www.mathworks.com/matlabcentral/fileexchange/87584-object-oriented-tools-to-fit-plot-conics-and...

8 días hace | 0

Respondida
Find blocks iof non-zero values in Matrix
Yes, the locations of the blocks are given by, f=@(z,k,dim) movmin(z,k,dim,Endpoints='fill'); locations = f( f( m ,6,2) ,20,...

8 días hace | 0

Respondida
Iteratively remove the rows and columns of a matrix
Hnz=nonzeros(H); C=Hnz*Hnz';

8 días hace | 1

Respondida
importONNXFunction can't import 'Conv' Operator which is not supported with its current settings or in this context?
This 'Conv' operator should be supported, as it has been specified in the documentation as a supported operator. I haven't loo...

9 días hace | 0

Respondida
Ho to Constraint GA to Generate Population Within Design Space
Yes, you can reparametrize the design vector x as, x=t1*v1+t2*v2 where v1 and v2 are the direction vectors of the two rays bou...

12 días hace | 0

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Respondida
Is it possible to allow a range for |Aeq*x-beq|<10e-6 in intlinprog function?
is it possible to specify a tolerance for the equality constraints such that the solution satisfies ∣Aeq⋅x−beq∣ <10−6 rather th...

13 días hace | 0

Respondida
Find X intercept with error estimates
If I can find the errors on the coefficients p, then I can easily find the uncertainity in the x intercept through propagation o...

13 días hace | 0

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Respondida
Issue with obtaining gradient from Qvalue critic using dlfeval,dlgradient,dlarrays
I really don't understand what you want me to do. In order for you to run it, I'd have to provide my whole project to you. Do yo...

14 días hace | 0

Respondida
How to construct a curve to replace the projected part of another curve?
[x,y]=readvars('black thin line.xlsx'); [x,y]=splitapply( @(a,b)deal(mean(a),mean(b)), x,y, findgroups(x) ); sub=~(24.7<=x ...

14 días hace | 1

| aceptada

Respondida
Validating multi-start fmincon optimization
My main Q is that: does make sense to confirm the solutions form fmincon solver with global optimization like surrogateopt? It ...

14 días hace | 0

Respondida
I am getting the error as " Not enough input arguments " and " Failure in initial objective function evaluation. FSOLVE cannot continue". Please suggest me possible solutions.
It is not clear from your code which variables are meant to be the 2 unknowns, and which are constants. In any case, your fun ne...

14 días hace | 0

Respondida
Help with getting data from image at equidistant positions from the centre - to include the "off circle corners"
[M,N]=size(yourImage); c=[M+1,N+1]/2; %image center rho=hypot((1:M)'-c(1), (1:N)-c(2)); G=discretize(rho,0:2:norm...

15 días hace | 0

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Respondida
differentiable approximation of bandwidth in ksdensity for optimization
ChatGPT offers the following:

15 días hace | 0

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Respondida
Variables Unrecognized in parfor but Work in for Loop
I am aware of this, but I was hoping to avoid writing 'params.' to reduce clutter in my code. You might consider this File Exch...

20 días hace | 1

Respondida
Variables Unrecognized in parfor but Work in for Loop
You should not be using eval to create new variables, regardless of whether the loop is parfor or a regular for loop, see also, ...

20 días hace | 1

| aceptada

Respondida
Can binarization be applied to a masked area only?
or if there is a way to discard evertyhing else outside the mask? Yes: Image=Image.*mask *Do I have to make a mask for each c...

20 días hace | 1

| aceptada

Respondida
Efficient access and manipulation of arrays in nested cells
There is no way to iterate over cells (nested or otherwise) without a loop, or something equivent in performance to a loop (cell...

21 días hace | 0

Respondida
Error using trainNetwork (line 191) Invalid training data. The output size ([1 1 2]) of the last layer does not match the response size ([512 512 2]).
It doesn't make sense that you have a "mask" unless you are doing semantic segmentation (i.e. pixel-by-pixel classsifcation), an...

22 días hace | 1

Respondida
Optimization stopped because the relative changes in all elements of x are less than options.StepTolerance = 1.000000e-06, but the relative maximum constraint violation, 9.999
Your ConstraintTolerance setting is extraordinarily large. Did you mean to have, ...'ConstraintTolerance', 1e-7)

22 días hace | 0

Respondida
Nested fmincon call to solve min max optimization
To solve without nested optimization, reformulate as, which can be solved using ...

23 días hace | 0

Respondida
How can i use symbolic variables in a parallel Computing (parfor)?
Dlu_11_1= zeros([M,N,N,M], 'sym') ; parfor t=1:(M*N)^2 [ki,kj,j,i]=ind2sub([M,N,N,M],t); Dlu_11_1(t)=d...

24 días hace | 1

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Pregunta

Are dlnetworks supposed to be allowed to have output layers?
Are dlnetworks allowed to have output layers? In the following code, I manage to create one, so the answer would seem to be yes....

24 días hace | 1 respuesta | 0

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