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Matt J


5,602 2009 年以降の合計貢献数

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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Matt J's バッジ

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  • 36 Month Streak
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How to develop a function that creates a finite vector space?
You can use intersectionHull in this FEX package https://www.mathworks.com/matlabcentral/fileexchange/30892-analyze-n-dimension...

約2時間 前 | 0

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cell2mat conversion
But is it possible to store 28 cells(10*25) in matrix form I'm starting to think you mean this [Matrix1,Matrix2,..., Matrix28]...

約3時間 前 | 0

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cell2mat conversion
ones(size( your_1x28_input))

約7時間 前 | 0

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cell2mat conversion
cellfun(@(c) var(sum(c,2)), your_1x28_input)

約7時間 前 | 0

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cell2mat conversion
cellfun(@(c) min(c(:)), your_1x28_input)

約7時間 前 | 0

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cell2mat conversion
cellfun(@(c) max(c(:)), your_1x28_input)

約7時間 前 | 0

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cell2mat conversion
cellfun(@(c) sum(c(:)), your_1x28_input)

約7時間 前 | 0

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cell2mat conversion
cellfun(@(c) std(c(:)), your_1x28_input)

約7時間 前 | 0

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cell2mat conversion
cellfun(@(c) mean(c(:)), your_1x28_input)

約7時間 前 | 0

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cell2mat conversion
cellfun(@(c) c(1), your_1x28_input)

約7時間 前 | 1

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Undesired behaviour of bsxfun and colon-operator
bsxfun(@(x,y)x+arrayfun(@(z)sum(0:z),y),1,6:9)

約7時間 前 | 0

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Undesired behaviour of bsxfun and colon-operator
bsxfun(@(x,y)x+y.*(y+1)/2,1,6:9)

約7時間 前 | 0

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Parallel Matrix row operation
function out = Proj_DoubleStochasticM_reloc(Y,sparsity) [m,n]=size(Y); [I,J]=deal(sparsity); for k=1:len...

約11時間 前 | 0

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How to optimize parameters in the following equation
Leave lsqcurvefit aside for the moment. First, get your model function to work! It cannot even be evaluated at your initial poin...

1日 前 | 1

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use 3D free form deformation for 3D image registration
There is imwarp, interpn, and griddedInterpolant.

1日 前 | 0

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Failure in initial objective function evaluation. FMINCON cannot continue
Test F1 on X0 before you give it to fmincon.

1日 前 | 0

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Why does my integral not work without the command "global"
To get rid of global, implement as follows a=1; k=1; T=1; q=integral(@(t)a.*t.^k,0,T);

2日 前 | 0

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Fminunc - complex standard errrors from taking inverse of Hessian
You can also try this finite differencer to see if it gives you better Hessian calculation https://www.mathworks.com/matlabcent...

2日 前 | 0

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eigs bug for 0 as lowest eigenvalue in parts of the matlab versions
From Tech Support: The issue that you are seeing is because of a bug which was introduced in R2017b, while implementing the ref...

2日 前 | 3

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Fminunc - complex standard errrors from taking inverse of Hessian
For the purpose of standard error computation, you should do a separate analytical computation of the Hessian at the final point...

2日 前 | 0

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Subscripted assignment dimension mismatch.
sxint(3,:) is not a scalar, but the left hand side S(i,1) is a scalar location.

5日 前 | 0

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eigs bug for 0 as lowest eigenvalue in parts of the matlab versions
That does seem like an interesting bug. This seems to work though Eg_sp = eigs(sp_matrix,1,1e-12);

5日 前 | 0

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Create a vector of vector exponents
No, a for-loop is fastest, but you want to implement it the right way, with a recursive update, m=repmat(v*A,n,1); %pre-allocat...

5日 前 | 0

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subtract each pixel from average pixel value
It seems deceptively simple... Image-meanValue

5日 前 | 0

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fmincon should return a scalar value error
AC Power reetuns 8760*1 value If you know that your objective function code is returning a 8760x1 value, it should be pretty cl...

5日 前 | 0

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Help in understanding optimization problems and solving them in Matlab (choise of appropriate solver)
You have to reformulate the problem with a convex objective to be certain that the Lagrangian minimization will behave as you're...

5日 前 | 1

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How to delete repeating column or duplicate column in MATLAB? of type Double
output_array=unique(input_array.','rows').'

5日 前 | 2

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imregister translation mode, suppress registration in second direction
One hack that I can think of (and I emphasize that it is only a hack) is to deliberately corrupt the images with bright horizont...

12日 前 | 0

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fsolve error using trustnleqn (line 28)
The initial point is [0;0;0;0;0;0;0;0;0]. Calling your function at this point gives something with NaNs >> equilibrium([0;0;0;0...

12日 前 | 0

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how to full fill the diagonal of a matrix by a vector
You can use interpMatrix from the File Exchange >> full(interpMatrix([1,2,3],1,5,1,'circ')) ans = 1 0 0 ...

12日 前 | 1

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