Community Profile

photo

Matt J


Last seen: 1日 前 2009 以来アクティブ

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.

Statistics

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

バッジを表示

Content Feed

回答済み
How can I include the legends within the for loop and how can I set the xticks in MATLAB?
So, how can I include legends with the for loop instead of writing it outside? You are assuming here that the for loop is the o...

約15時間 前 | 0

| 採用済み

回答済み
Rect function with Array
function [y] = rect(T0, A, t) y= ((t >= -T0/2) & (t <= T0/2)) * A; end

2日 前 | 0

| 採用済み

回答済み
Count the occurrence of each element in an array
string = 'I am happy'; [N,e]=histcounts(double(string),32:130); table(char(e(N>0)'),N(N>0)','VariableNames',{'Character','...

2日 前 | 0

回答済み
Why the outcome of my code is just white image?
Give imshow() a second argument to see the desired grayscale range. img1=im2gray(imread('cameraman.tif')); kernel = ones(3, ...

2日 前 | 1

送信済み


Further tools for analyzing objects in N-dimensional images
A collection of tools to supplement bwpropfilt, bwareaopen, and the like.

3日 前 | ダウンロード 1 件 |

回答済み
if and sum not working together
Because the sum cannot be done exactly in floating point. Therefore you need a tolerance, a = zeros(10,1)+0.001; b = sum(a) i...

3日 前 | 1

| 採用済み

回答済み
what exactly norm(x) function do?
Assuming you only care about p=2, If you already have code that computes norm(x) for real x, you can extend it to complex x via,...

3日 前 | 0

回答済み
Formula for norm(x)
Assuming you're only interested in p=2, if you already have code that computes norm(x) for real x, you can extend it to complex ...

3日 前 | 0

回答済み
Multiple Image reconstruction with real and imaginary part in 2d array
What is the name of the variable stored inside the .mat files? If I assume it is X, then, a_real = load("img_real.mat").X; a_i...

4日 前 | 0

回答済み
Equality between 2 floats not recognized when using <= relational operator
I feel pretty confident that either Money_types or Var2 is not truly equal to 0.05 in spite of what you suppose. It may appear t...

4日 前 | 0

回答済み
Concatenate vectors stored in cell array
cell2mat( reshape( yourCell.' ,1,[],27) )

4日 前 | 1

回答済み
Why ifft results of analytic signal spectrum don't match with theoretical time formula?
The IFFT and the continuous inverse Fourier transform are not the same thing. tau=0.4; t0=2.8; mag=10; Fs=200; dT=1/Fs; ...

4日 前 | 0

| 採用済み

回答済み
Add constraints to intermediate variables in the process of using least squares to minimize the objective function to fit the parameters of the equation
With the constraints you mention, the problem does not fall within the scope of lsqnonlin. You will have to use fmincon, which a...

4日 前 | 0

| 採用済み

回答済み
Trapezoidal rule with unevenly spaced data points
See trapz.

4日 前 | 0

回答済み
regionprops Bounding box property returns values outside image dimensions
You should be comparing BoundingBox(1) with ImageSize(2) image = imread('https://www.mathworks.com/matlabcentral/answers/uploa...

4日 前 | 1

回答済み
How do I graph a summation over an interval?
n=(0:10).'; fcn=@(x)sum( (2/3).^n .* cos(9.^n.*(pi.*x)) ); fplot(fcn,[-1,1]/10)

4日 前 | 1

| 採用済み

回答済み
How to Vectorize this Code?
n3Array=normalize(n3Array,2,'n'); b0=b0/norm(b0); b0angles=acosd(n3Array*b0);

5日 前 | 0

| 採用済み

回答済み
ScatteredInterpolant for Surface Extrapolation
The surface appears to be very well modeled by a Gaussian. An appropriate thing would therefore be to extrapolate using a Gaussi...

5日 前 | 0

| 採用済み

回答済み
ScatteredInterpolant for Surface Extrapolation
[MAP_X,MAP_Y,MAP_Z]=readvars('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1131415/MATLAB.csv'); res=@(q)re...

5日 前 | 0

回答済み
Using the output of one run of a function as the input of another iteration of that function
for i = 1:Counter List = ReduceArray(List); end

5日 前 | 0

回答済み
How should we evaluate the similarity of two graphs?
I don't know why you think the MSE is "large", but perhaps the percent area difference would be more suitable to you: load elli...

5日 前 | 0

回答済み
How to edit the name of a variable which is an object of a class?
This might be what you want. obj={GridSys1,GridSys2,GridSys3}; %list of objects [I,J]=find(A.*(1-eye(size(A)))); K=numel(...

6日 前 | 0

| 採用済み

回答済み
Find max value in polyfit
xcrit=roots(polyder(q1)); %set derivatives to 0 xcrit(imag(xcrit)~=0)=[]; %get rid of non-real solutions zmax=max( polyva...

6日 前 | 0

回答済み
How to do 4-D Equivalent of 3-D surface fitting ?
You can lsqcurvefit if you have Optimization Toolbox. If not, then you might be able to use fminsearch, if you have only a smal...

6日 前 | 0

回答済み
How to use a trained neural network as objective function in fminsearch?
fminsearch.is unlikely to be able to handle 12 unknowns well. You should probably use fminunc if you have the Optimization Toolb...

6日 前 | 0

| 採用済み

回答済み
How does the mod function compensate for floating point round off?
I suspect it is just meant to tell you that it doesn't do a naive computation like in modNaive below. m=1000*pi; n=pi; mod(...

6日 前 | 1

回答済み
Plotting a triangle from 3 3x1 matrices
a = [5; 8; 13]; b = [-5; 7; 21]; c = [12; -32; 0]; V=num2cell([a,b,c,a],2); plot3(V{:},'-o', MarkerFace='r'); xlabel x; ...

7日 前 | 0

| 採用済み

回答済み
If I renew my support contract can I download and install in new computer
The support contract is unrelated to the ability to install on additional machines. Most licenses entitle you to activate a Matl...

7日 前 | 0

回答済み
Why fsurf show anything for my function?
You should normalize the function, so that the default MeshDensity works well. syms eta__2 zeta__2 Hvs2 =((230584300921369395...

7日 前 | 0

| 採用済み

回答済み
How to find mean in theta-direction?
[theta,rho]=cart2pol(x,y); G=discretize(rho,___); %fill in the blank with desired binning specs zMean=splitapply(@mean,z(:...

7日 前 | 1

| 採用済み

もっと読み込む