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Matt J


Last seen: Today |&nbsp Active since 2009

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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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Answered
Is there a setting to move labels on a plot closer
You can use the axis label text object porperties to move them around, e.g., h=gca; h.XLabel.Position(end)=h.XLabel.Position(e...

14 hours ago | 0

| accepted

Question


When did the syntax for linprog change
At one point, the input syntax for linprog was x=linprog(f,A,b,Aeq,beq,lb,ub,x0,options) but now (R2023b) I see that it has c...

1 day ago | 1 answer | 0

1

answer

Submitted


Constrained minimum L1-norm solutions of linear equations
Finds least L1-norm solutions to linear equations C*x=d subject to linear and/or integer constraints.

1 day ago | 10 downloads |

Answered
The issue of optimization (minimization) of the average relative error between experimental and calculated data
If you download minL1lin from https://www.mathworks.com/matlabcentral/fileexchange/52795-constrained-minimum-l1-norm-solutions-...

1 day ago | 0

Answered
How can I efficiently save and access large arrays generated in nested loops?
I used the following given method to save the data, and it produced an 11 GB file, which seems very large. The memory consumpti...

1 day ago | 0

Answered
Why ILP Solver Switching to Branch-and-Bound?
Assuming you are using intlinprog, it will always uses the branch-and-bound algorithm at some stage of the processing (not sure...

2 days ago | 0

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Answered
How to average across tables in a cell
AvgTb=Tb{1}; AvgTb{1}{:,:}=(Tb{1}{:,:}+Tb{2}{:,:}+Tb{3}{:,:})/3;

3 days ago | 0

| accepted

Answered
Detecting circles in an image to measure inner and outer diameter
Because of the angle of the camera, circular shapes like the ones you are looking for are imaged as ellipses. Since imfindcircle...

4 days ago | 0

Answered
Find strings within other strings then pull data from that point
fileContent = fileread('P0300.txt'); prefix="01 3E"; e=" "+digitsPattern(2); pattern = prefix+e+e+e; matches = extractAf...

4 days ago | 0

Submitted


Array Concatenation with Implicit Expansion
Versions of cat(), horzcat(), and vertcat() that support implicit expansion

7 days ago | 4 downloads |

Answered
Finding the closest coordinate from a surface plot based on a X, Y location
F=griddedInterpolant({Slab_strike.x,Slab_strike.y},Slab_strike.z,'linear','nearest'); Strike = F(lon_GMM,lat_GMM);

7 days ago | 0

Answered
Is it possible to find the line-of-sight for coarsely spaced and uneven terrain data points?
You coulduse linexline2d from this FEX post, https://www.mathworks.com/matlabcentral/fileexchange/93470-intersections-of-multi...

7 days ago | 0

Answered
Transforming Optimization Code from Problem-Based to Solver-Based Approach in MATLAB
See prob2struct

7 days ago | 0

Answered
Split matrix into N Equal Parts by rows
You can also use mat2tiles, https://www.mathworks.com/matlabcentral/fileexchange/35085-mat2tiles-divide-array-into-equal-sized-...

7 days ago | 0

Answered
quadprog output: this problem is non-convex
I think you probably should report it as a bug, but a possible workaround would be to approximate the original problem with ineq...

9 days ago | 0

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Answered
How to change in marker size in the global legend?
You will probably have to use legendflex from the file exchange, https://www.mathworks.com/matlabcentral/fileexchange/31092-leg...

9 days ago | 1

Answered
How to generate vector with non-linear spacing?
a=-1; b=+1; d=1/(b-a)^2; y=d*randn(1,500); x=sort(y+(a+b)/2); stem(x,x.^0); xlim([a,b])

9 days ago | 0

Answered
Methods of Detecting and Removing Protrusions in Image
Use bwlalphaclose from this FEX package, https://www.mathworks.com/matlabcentral/fileexchange/90762-further-tools-for-analyzing...

10 days ago | 0

Answered
liste vertex into polyhedron
See lcon2vert in this FEX download, which does not require the Optimization Toolbox, https://www.mathworks.com/matlabcentral/fi...

10 days ago | 0

| accepted

Answered
How can I replace the upper off diagonal(super diagonal) and lower off diagonal(sub diagonal) of a matrix?
n=8; T=diag(rand(n,1)) diagonal=diag(T); offdiagonal=rand(n-1,1)' %desired values B=[ [offdiagonal(:);0], [0;offdiagon...

10 days ago | 0

Answered
How can I replace the upper off diagonal(super diagonal) and lower off diagonal(sub diagonal) of a matrix?
n=8; T=diag(repelem(1.8,n)); T(2:2*(n+1):end)=1; T(n+1:2*(n+1):end)=1

10 days ago | 0

Answered
Finding the "center" of an extended ring
load Image BW0=BW; A=bwareafilt( imfill(BW,'holes'),1); BW=imclose(A.*BW, strel('disk',3)); B=bwconvhull(~(~A|BW)); m...

10 days ago | 0

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Answered
How can I find the set of vertices of hexagons which are adjacent to a random point?
hex=[ 0 -1.0000 -0.8660 -0.5000 -0.8660 0.5000 0 1.0000 0.8660 0.5000 0.8660 ...

10 days ago | 2

| accepted

Answered
How can I continue training my network from the previous state?
Just call trainnet() again, feeding it your net in its current state, rather than an untrained layer graph. You may wish to adj...

11 days ago | 1

Answered
colorbar graph exceeding matrix values
You haven't attached Ft for us to examine, so we have no way to verify your claim that the data is bounded to [0,1]. Regardless,...

11 days ago | 0

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Answered
How to use Matlab trainnet to train a network without an explicit output layer (R2024a)
1) Is it possible to use trainnet in a network without an output layer? It is difficult to imagine that a built-in training func...

14 days ago | 0

Answered
Work Around for Convolution1DLayer
Why not just use a convolution2dLayer? A 1D input is just a special case of a 2D input.

16 days ago | 0

Answered
find best fit ellipse to a set of data points
Use ellipticalFit() from, https://www.mathworks.com/matlabcentral/fileexchange/87584-object-oriented-tools-to-fit-plot-conics-a...

17 days ago | 2

| accepted

Answered
FFT of 3D array in MATLAB
Why reinvent the wheel. Why not just use the open source FFTW C/C++ library (which Matlab is based on). https://www.fftw.org/ ...

17 days ago | 0

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Answered
is it possible to see what variables and functions affecting a certain variable ?
Perhaps you are looking for matlab.codetools.requiredfilesandproducts.

17 days ago | 0

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