Matt J

Last seen: 1日前 | 2009 年からアクティブ

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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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Pause button not functioning
Try using waitfor instead, along with some sort of uicontrol, e.g., % Create the figure fig = figure; % Add a button to ind...

約13時間前 | 0

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Why does converting categorical(0) to double add 1?
It doesn't add 1. It just enumerates your categories (in numerical or alphabetal order), e.g., double( categorical(["dog","cat"...

約13時間前 | 0

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Converting 1x1 struct with multiple fields to numeric matrix
tieup.x1 = '2,3,6'; tieup.x2 = 3; tieup.x3 = 4; tieup.x4 = '1,4,5'; tieup.x5 = '1,2,3,6'; f=string(fieldnames(tieup))'; ...

約16時間前 | 1

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How to resolve this error?
[y, e] = hFDAF(x, d);

約20時間前 | 0

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How to find values in a nested struct with repeating fieldnames?
I think a loop in combination with the find function could do the trick, but this seems like an inefficient and error-prone way....

約20時間前 | 0

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multiply a matrix into every block matrix in a big matrix
Hc=[1,2;3,4]; A=kron(ones(3),eye(2)); %2x2 blocks Aij blockheight=2; result=reshape( Hc*reshape(A,blockheight,[]) , ...

1日前 | 0

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multiply a matrix into every block matrix in a big matrix
You can download this package, https://www.mathworks.com/matlabcentral/fileexchange/115340-block-transposition-permutation-and-...

1日前 | 0

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Are there MATLAB functions or scripts to perform boolean operations on triangulated solids?
If you mean you want to take intersections and unions of meshes, then no, there are no MathWorks-authored commands to do that. H...

1日前 | 0

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How to save and load MATLAB app?
The app object contains handles to all the app's uicontrols, but your LoadConfigMenuSelected callback doesn't reference any of ...

1日前 | 0

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How to get the Class Names from a dlNetwork?
After you've trained the model as a dlnetwork, there is nothing stopping you from converting it back to a traditional SeriesNetw...

3日前 | 0

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handling data inside for loop
dataAllFiles4 = cell(2,length(csvFiles4)); dataIndex = 1 for k4 = 1:length(csvFiles4) % Get the full file name b...

3日前 | 0

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Identifying Boundary Nodes in a Point Cloud
If the regions are supposed to be convex, you can use convhull or convhulln.

6日前 | 0

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How to find the multiplication or division value of a matrix for each row and column in matlab
A.*B A./B

6日前 | 0

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Overlay data points on image plot and only rotate image points not the image using imref2d
load B.mat; %load reverse imcomplement of image load x_world load y_world figure(1); theta = -90; %rotate image counterclock...

7日前 | 0

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What is the correct way to save a large MATLAB structure?
but how can 56GB of "overhead" be considered acceptable? It depends on what your struct contains. Field data containing handle ...

8日前 | 1

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How to remove all NaN and Inf values when calculate the mean?
If you're saying you want to take the column-wise mean, ignoring zeros and non-finite values, then you could do, exclude = (Lo...

8日前 | 0

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Can MATLAB do a 2-D FFT on a uniform parallelogram grid of measured points?
I need to Fourier Transform my parallelogram grid of measured values into ground freq domain, the Inv FT that into ground time d...

9日前 | 0

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How to find the point the graph crosses the x axis
x = @(t) (0.3) .* exp(-3 .*t) .* cos(4 .* t) + 0.2 .*exp(-3 .* t) .* sin(4 .* t); firstroot = fzero(x,[0,1]) %% graphs par...

9日前 | 0

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After segmentation how to save number of subobejcts for each objects
If you mean you want to extract the sub-images forming the bounding box of each circle, then perhaps something like the followin...

10日前 | 0

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How to use fsolve to solve all the equations?
given too many results Perhaps you should use uniquetol, rather than unique.

10日前 | 0

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Controlling aspect ratio for tiled layout
[epsilon, phi,omega]=deal(rand(10), rand(10), rand(10,1)); tiles = tiledlayout(1,3); tiles.TileSpacing = 'loose'; ax1 = ...

11日前 | 0

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Why does my matrix not change with each iteration?
I don't know why you think B should be changed by the loop when you generate it prior to the loop and never touch it again. Perh...

11日前 | 0

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Optimization of Material Parameters
lsqcurvefit

12日前 | 0

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Doc links no longer work
I experienced this and found it was because of name conflict between one of my user-authored mfiles and a MathWorks-authored mfi...

13日前 | 0

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Can I run online a version different from the latest?
I don't think you can select an earlier Matlab version in Matlab Online.

13日前 | 0

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How to customize the markers of the scatter figure, as shown below
Here's one way. Not sure you'll like the gymnastics that it requires: [x,y]=deal(rand(1,40), rand(1,40)); %scattered input dat...

13日前 | 2

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Linear indices from colon operator
[I,J]=ndgrid(p1:p2,p3:p4); linear=sub2ind(size(array) , I,J);

13日前 | 1

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Geometry properties in 3D (area, volume, moment of inertia...)
You can project your planar points into a 2D coordinate system and then use whatever 2D methods you had used previously to compu...

15日前 | 0

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Finding contiguous regions of interest in a mask and calculating the mean values of those regions when the mask is applied to an array
myImage=myImage'; L=L'; Lmax=max(L(:)); result=cell(1,Lmax); for i=1:Lmax result{i}=rasterMean(myImage(L==i...

15日前 | 0

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Handling missing observations while using fmincon
They should be zeros rather than NaNs, shouldn't they? With zeros, they will make no contribution to the linear part of the pred...

15日前 | 0

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Matt J

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