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Matt J


Last seen: Today 2009 年からアクティブ

Followers: 3   Following: 0

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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  • Most Accepted 2023
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回答済み
how to remove variables of a table with a zeros in it
keep=all(yourTable{:,:},1); yourTable=yourTable(:,keep);

約1時間 前 | 0

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I want all possible distinct lists of the pairs of the elements that can be made from a vector having j ones, j twos, and j threes where j is an even integer.
If not, is there an efficient algorithm to calculate all possible distinct lists PLi for large j or to estimate the dependence ...

約18時間 前 | 0

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3D resize image for BIG image size
My another strategy is I can read them separately for all Z and reduce image half in X and Y using "tiffreadVolume" and "imresi...

2日 前 | 0

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How do I put a uitable in a tiledlayout?
If you are going to be inserting uitables, it would be advisable to use UI graphics elements everywhere else too, fig=uifigure...

3日 前 | 0

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How can you update plot data from properties in an object?
Consider animatedline

3日 前 | 0

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Error with Vector Length
The code you've shown produces empty t: t0=0; t1=-10; t2=20; [x,t]=step(t0,t1,t2); x=x',t

3日 前 | 0

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Can I use lsqcurvefit for a multivariable nonlinear regression
Yes, lsqcurvefit can be applied to problems of any dimension.

3日 前 | 0

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How to rotate a hyperbola drawn along with the reference line?
%% Input values D = 250; % mm distance c = 4; % mm/s velocity del = 10; % a constant theta...

3日 前 | 0

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Circle fit in pointcloud, stl
See the section "Fitting a 2D Shape to 3D Points" in the Examples tab of this FEX submission: https://www.mathworks.com/matlabc...

3日 前 | 0

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How can I rotate a volshow image programatically?
Can I rotate the volume instead of the camera? Yes, you can use the Transformation property. I tried using CameraPosition an...

3日 前 | 1

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What is the best data structure for mapping a key to an array of values in MATLAB?
Dictionaries are supposed to be faster than structs, but they require a recent Matlab version. keys="UniqueKey"+(1:3)'; valu...

4日 前 | 1

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Property Type in constructor vs dependent
Property type specifiers, such as the double specifier in, properties (Dependent) D_b double end only perfor...

4日 前 | 2

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Which is the difference between 'multi-gpu' and 'parallel-gpu' in 'trainingOption' function of the DeepLearning Toolbox?
According to the doc, 'parallel-gpu' has the additional capability of being able to use remote GPUs. Since that doesn't apply to...

4日 前 | 0

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Find the coordinates of the nodes of an matrix inside another matrix
Sounds like you could just use ismember(___,'rows')

6日 前 | 0

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Use of tensorprod function to compute multilinear forms
J=A; while ~isvector(J) J=pagemtimes(v',squeeze(J)); end res=J*v

6日 前 | 0

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Use of tensorprod function to compute multilinear forms
n = 3; A = rand(n,n,n,n); v = rand(n,1); J=pagemtimes(v',pagemtimes(A,v)); res=v'*reshape(J,[n,n])*v

6日 前 | 0

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What happens to cleared custom `handle` objects?
If you clear c, then that copy of the handle is gone, while other shared instances of it that you may have created remain. If yo...

6日 前 | 1

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How plot a grid of rectangles on an overlaid circle?
R = 5; % circle radius H = 1; % rect height W = 2; % rect width circ=nsidedpoly(1000,"Radius",R); %polyshape for the circle...

6日 前 | 0

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How can I make the layout in the attached image with tiledlayout
If you download nestedLayouts, https://www.mathworks.com/matlabcentral/fileexchange/161736-grids-of-tiled-chart-layouts then y...

7日 前 | 0

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Conditional array accumulation inside parfor
map = false(N,M); parfor k=1:M*N [n,m]=ind2sub([N,M],k); map(k) = ( f(m,n)>0 ); end [I,J]=fin...

7日 前 | 2

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Lower precision in trainnet workflow
Just pass in training data with a lower precision type (e.g., singles versus doubles).

8日 前 | 0

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Understanding implicit surface plot behavior
Re-running the code in the latest release, R2024a, it appears the problem has been fixed. Q=diag([0,1,1]./3^2); axis([-5 5 -...

11日 前 | 0

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質問


Passing additional minibatchable quantities to a trainnet() loss function
I am calling trainnet() with the syntax, netTrained = trainnet(cds,net,lossFcn,options) where lossFcn=f(Y,T) is a handle to a ...

11日 前 | 0 件の回答 | 0

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fminunc not converging objective function
You need to a better choice of units for x(3), at least for the optimization step. Below, I modify the objective function so tha...

12日 前 | 0

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Need help in MATLAB tiled layouts (nested)
If you download nestedLayouts, https://www.mathworks.com/matlabcentral/fileexchange/161736-grids-of-tiled-chart-layouts?s_tid=s...

12日 前 | 1

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Save a 3D image to TIFF
See saveastiff, https://www.mathworks.com/matlabcentral/fileexchange/35684-multipage-tiff-stack?s_tid=srchtitle

12日 前 | 0

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Coding the Jacobian efficiently in MATLAB
minusA = -A; J=@(u) JacobianEngine(u,minusA); function Jn = JacobianEngine(u,Jn) p=numel(u); Jn...

13日 前 | 0

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Should the discrete 2D convolution from MATLAB be multiplied with twice the nodal step size ?
Yes, that is correct.

16日 前 | 1

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Error with spdiags size dimensions in pentadiagonal matrixes
Does anyone know if spdiags has undergone any significant updates between versions these 2 years? Yes, support for the syntax y...

17日 前 | 1

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回答済み
Why can't polyshape.union() consolidate neighboring polygons?
Tech Support has confirmed this as a bug, and have indicated the incremental loop-based method as a valid workaround.

17日 前 | 0

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