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Matt J


Last seen: Today Aktiv seit 2009

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
  • Most Accepted 2022
  • Editor's Pick
  • Personal Best Downloads Level 4
  • Grand Master
  • Most Accepted 2021
  • First Review
  • 5-Star Galaxy Level 5
  • First Submission
  • Revival Level 4
  • 36 Month Streak
  • Thankful Level 5

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Gesendet


Grids of tiled chart layouts
A tool for simplifying the creation of nested tiled layouts

etwa 4 Stunden vor | 3 Downloads |

Beantwortet
Merging files based on location similarity use polyshape and overlaps
The variable naming in your posted code doesn't reflect the terminology in your text explanation, making it hard to interpret. T...

etwa 18 Stunden vor | 0

Beantwortet
Multiple ylabels for tiledlayout
One approach would be to create a 2x1 tiledlayout where inside each tile you nest another tiledlayout of dimension 2x6. You can ...

2 Tage vor | 0

| akzeptiert

Beantwortet
lsqnonlin (lsqcurvefit , fmincon) does not change the variables in an optimization process to find the best fit
Consider the various recommendations at, https://www.mathworks.com/help/optim/ug/optimizing-a-simulation-or-ordinary-differenti...

3 Tage vor | 1

Beantwortet
Loop through list of vectors (ie, the rows of a matrix), applying same "simple" function to each one, on GPU? Should I use arrayfun somehow?
Well whether you use the GPU or not, you don't have to loop across measurements. The operations in your example are trivial to v...

3 Tage vor | 0

Frage


Hovering in debug mode triggers a jump into get.property() methods
I have been experiencing an aggravating thing for the past several Matlab releases and for which I am looking for troubleshootin...

3 Tage vor | 0 Antworten | 0

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Antworten

Beantwortet
Delete Negative Duplicates from Array
X=randi(9,3,4); X=[X,-X(:,1:2)] map=triu(squeeze(~any(X+reshape(X,3,1,[]),1))); [I,J]=find(map); X(:,[I;J])=[]

4 Tage vor | 0

| akzeptiert

Beantwortet
Area under the plot
bwarea(I_rev)

5 Tage vor | 0

| akzeptiert

Beantwortet
fill color between two curve
prf=3500; NumberOfAmbigiousArea=30; m=(1:NumberOfAmbigiousArea); rx = zeros(1,2*length(m)); %%%Distance of Amb Area p=prf...

5 Tage vor | 1

| akzeptiert

Beantwortet
pulling non-consistent arrays out of a structure
Here's a way you can extract and concatenate all the x,y data. However, I don't understand what you are trying to do with the m...

6 Tage vor | 0

Beantwortet
How to assign outputs of a function to an anonymous function in order to optimize with lsqcurvefit
% test data xdata = ... [0.9 1.5 13.8 19.8 24.1 28.2 35.2 60.3 74.6 81.3]; ydata = ... [455.2 428.6 124.1 67.3 43.2 28.1 1...

6 Tage vor | 0

| akzeptiert

Beantwortet
Converting FEA data as table into n-D gridded-data Array for Use with 'griddedInterpolant'
x=unique(t{:,1}); nx=numel(x); y=unique(t{:,2}); ny=numel(y); z=unique(t{:,3}); nz=numel(z); v=permute( reshape(t{:,4},[ny,...

6 Tage vor | 0

| akzeptiert

Beantwortet
LU decomposition with 5 output arguments
dA=decomposition(A,'ldl'); x=dA\b;

6 Tage vor | 1

Beantwortet
How to plot 3D image in MATLAB?
volshow(Image.*(Image>=threshold)) There are also a number of 3D viewers offered on the File Exchange.

8 Tage vor | 0

Beantwortet
Issue with finding circle and it's center in the image
Your posted code cannot be run by us and tested because input data and your homemade imgshow() function are not provided. Howeve...

8 Tage vor | 0

Beantwortet
Matrixes not multiplying correctly using for loops
[n,w]=size(a); [h,m]=size(b); assert(w==h,'Inner dimensions incompatible') c=zeros(n,m); for i = 1 : n for j = 1 : m...

9 Tage vor | 1

Beantwortet
How to plot a large number of rectangles from a matrix
I don't really see why you need to find bounding rectangles to do what you describe. You could just represent the regions as pol...

9 Tage vor | 0

| akzeptiert

Beantwortet
Writing a function that accepts input argument that is one of 3 things
Does it want me to print the results of y using the fprintf function? No, it wants you to write the function fcn so that it beh...

9 Tage vor | 1

Gesendet


ezplane
Plot an arbitrary 3D plane given its equation.

10 Tage vor | 0 Downloads |

Beantwortet
Weird unexplainable results when fitting gaussian curve
You need bounds to regularize the problem, load data [~,g]=fit(x(:),y2(:),'gauss1'); R2=g.rsquare [~,g]=fit(x(:),y2(:),...

11 Tage vor | 1

| akzeptiert

Beantwortet
Write a MatLab script to plot two ellipses using the plot function
As an example, here is a way to plot an unrotated ellipse of known major/minor axis lengths a,b. a=5; b=3; %major/minor axes ...

11 Tage vor | 0

| akzeptiert

Beantwortet
Does lsqnonlin handle a matrix objective function?
The matrix dimensions of the objective function output can be whatever you wish. It doesn't affect anything. The initialGuess c...

11 Tage vor | 1

Beantwortet
I need to run code written for NVIDIA GPUs with at least 8gb of RAM
According to this, https://hub.docker.com/r/mathworks/matlab campus-wide licenses are "already configured for cloud use".

11 Tage vor | 0

Frage


Is there a way to compute the n-th symbolic derivative of a function where n is also symbolic?
Is there a way to compute the n-th symbolic derivative of a function, where n is also a symbolic variable? The following does no...

11 Tage vor | 1 Antwort | 0

1

Antwort

Beantwortet
Given a taylor series of a function f, how do I get the original function f
syms x k f = symsum(x^k/factorial(k),k,0,Inf)

11 Tage vor | 0

Beantwortet
How to obtain all permutations of multiple cell arrays?
Using this FEX download, https://www.mathworks.com/matlabcentral/fileexchange/115340-block-transposition-permutation-and-reshap...

12 Tage vor | 0

Beantwortet
How to obtain all permutations of multiple cell arrays?
This is better because the for loop is only 6 iterations long. A={'a1'; 'a2'; 'a3'}; B={'b1'; 'b2'}; C={'c1'; 'c2'; 'c3'; 'c4...

12 Tage vor | 0

| akzeptiert

Beantwortet
Vectors must be the same length
i = gradient(q(:, 1),t); % Current derivative U_R = R * i; % Resistor's voltage U_L = L * gradient(i,t); ...

13 Tage vor | 1

| akzeptiert

Beantwortet
affine3d used for pure rotation causes translational misalignment
I don't really understand how your posted images show that something is wrong. It shows that the image has changed after the war...

13 Tage vor | 0

| akzeptiert

Beantwortet
Non linear fit extremely bad : what am I doing wrong ?
There are ways to derive an accurate x0 more systematically, e.g., rng('default') t = 0:0.02:10; x = t.*sin(2*pi*1*t) + 0.1*ra...

14 Tage vor | 0

| akzeptiert

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