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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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Beantwortet
Error in interpolating: Actual data does not match with interpolated data
load inputData i=11; j=3; %query points (Lat and Alt) %% interpolate LUT1=griddedInterpolant(Long1c_4d,Lat1c_4d,Alt1c_4...

42 Minuten vor | 0

Beantwortet
How to close boundary of a circular object in binary image
load Image [c,r]=imfindcircles(BW,[10,100]); area=pi*r^2

etwa eine Stunde vor | 0

Beantwortet
How to find and fit the objective function for a damped oscillation?
Using fminspleas from the File Exchange, https://www.mathworks.com/matlabcentral/fileexchange/10093-fminspleas [t,F]= readvar...

etwa 10 Stunden vor | 1

Beantwortet
interpolation of a structure array
fcn=@(f)interp1(f, linspace(1,numel(f),101) ); for i=1:numel(TrajXLstance) TrajXLstance(i) = structfun(fcn, TrajXLs...

etwa 14 Stunden vor | 0

| akzeptiert

Beantwortet
Finding min and max values in a structure
each field consisting of a cell of numbers If you really do mean a cell array, that seems like an inadvisable organization of t...

etwa 14 Stunden vor | 0

Beantwortet
Type conversion happens before matlab Set method is called in classes, problem with setting int64(Nan) = [] default is 0
Another approach, using subsasgn(). This one avoids conversion of obj.a to double. >> obj=myclass; obj.a=1:5, obj.a(2)=nan o...

etwa 16 Stunden vor | 1

Beantwortet
Type conversion happens before matlab Set method is called in classes, problem with setting int64(Nan) = [] default is 0
One possibility: >> obj=myclass; obj.a=1:5, obj.a(2)=nan obj = myclass with properties: a: [1 2 3 4 5] obj...

etwa 16 Stunden vor | 1

Beantwortet
How do I interprete Camera extrinsic parameters?
cameraLocation = -camExtrinsics.Translation/camExtrinsics.R; or in other words if , the optical center is at .

etwa 20 Stunden vor | 0

Beantwortet
Vectorize a nested loop
EDITED: R=10; K=size(lambda_tol_vector.Value,1); CompletedMat_parvec=cell(R,K); B=double(B); parfor n=1:R*K ...

etwa 21 Stunden vor | 1

| akzeptiert

Beantwortet
Image segmentation for each slice in a volume stack
clear areas for i = size(stack,3):-1:1 ... all_areas = regionprops(area_filt, 'Area'); areas{i} = [all_are...

ein Tag vor | 0

| akzeptiert

Beantwortet
Trying to find the odd and even number from 3:200 using equation mentioned below
n = 3:200; even=~rem(n,2); x = (n-3)/2 + 1 ; x(even)=(n-4)/2+0.5;

ein Tag vor | 0

| akzeptiert

Beantwortet
How to fit a function that has significant changes dependent on small changes of some parameters
Change the units of L to something smaller. Stop trying to measure the distance between houses in kilometers rather than in met...

ein Tag vor | 0

Beantwortet
Differences in power law fit vs. linear fit on log-log scale
There is a difference because the statistical distribution of the measurement errors changes under the log transformation. You s...

ein Tag vor | 0

Beantwortet
Detecting maximum with threshold
If you have the time, please look over my work and provide some guidence. In detectThreshold(), you need to add control logic ...

ein Tag vor | 0

Beantwortet
I want to turn this code into led light instead of red ones
Is this what you want? IMG=load('Image').A; c=regionprops(all(IMG>250,3),'Centroid').Centroid; %LED centroid/position ims...

ein Tag vor | 0

Beantwortet
Logical Indexing of Meshgrid
Logical arrays can be 3D just like any other Matlab array (except tables and 2D sparse matrices). You can use volshow to get a 3...

ein Tag vor | 0

Beantwortet
I want to find distance of an object in various of images
See triangulate().

ein Tag vor | 0

| akzeptiert

Beantwortet
How do I find the distance from 2 cameras to an object?
See triangulate().

ein Tag vor | 0

Beantwortet
iterating with predefined submatrix range
section_1 = {10:15, 6:18; 9:15, 6:20; 12:13, 34:36}'; for s = section_1 [i,j]=deal(s{:}); T(i,j, k + 1) = t_human *(T...

2 Tage vor | 0

Beantwortet
How to vectorize the evaluation of a kernel function.
K=1./pdist2(x_points,y_points);

2 Tage vor | 2

Beantwortet
Can we manipulate a file without opening it
If you have one single file, the reading and saving of the file should probably happen outside the loop. Use the parfor loop to ...

4 Tage vor | 0

Beantwortet
Incompatible sizes of arrays.
but i got error "Arrays have incompatible sizes for this operation." Can someone explain why? It should be obvious from the d...

4 Tage vor | 0

Beantwortet
Optimization: Capacitated Facility Location Problem
x=optimvar('x',[n,m],'Upper',0); y=optimvar('y',n,'type','integer','Lower',0,'Upper',1); objective=sum(f(:).*y(:))+sum(c(:)....

5 Tage vor | 2

Beantwortet
How to plot an Ellipse
Using this FEX download, https://www.mathworks.com/matlabcentral/fileexchange/87584-object-oriented-tools-for-fitting-conics-an...

5 Tage vor | 0

Beantwortet
Computing centroid of a detection box after computing NCC between a template image and another image
Centroid=[xoffSet,yoffSet] + [size(temp,2),size(temp,1)]/2; plot(Centroid(:,1),Centroid(:,2),'ro');

5 Tage vor | 0

| akzeptiert

Beantwortet
Use array values as assignment indecis
The question has nothing to do really with ismember. It's more about how to turn a list of interval end points into indices. One...

5 Tage vor | 0

| akzeptiert

Beantwortet
why does my data kick up at the end after doing ifft(X)
why does my data kick up at the end Remember, because of the circulant property of IFFTs, the values near the end of the array ...

6 Tage vor | 0

Beantwortet
How to reconstruct the images from the blocks of pixel?
imgCell=cell(1,31*45); for i = 1:31*45 imgCell{i} = imread(['C:\Users\Administrator\Desktop\' num2str(i) '.png']); end i...

6 Tage vor | 2

Beantwortet
2x2 Projection matrix of rank 1
a=[1; 2]; n=[3; 4]; x=[5; 6]; r1p(a,n,a) r1p(a,n,n) r1p(a,n,x) function p = r1p(a,n,x) % computes the action of P, the ...

6 Tage vor | 1

| akzeptiert

Beantwortet
Constrained multiple linear regression with multiple dependent variables
lsqlin is applicable with, N=size(beta,1); C=kron(X.',eye(N)); d=Y(:);

6 Tage vor | 0

| akzeptiert

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