Answered
Variable handling problem with parfor
I would try as below. This will be faster than your original version anyway, even before the conversion from for to parfor. if ...

3 years ago | 0

| accepted

Answered
Is there a way to remove groups of pixels that are below a certain threshold of connectivity similar to the way bwmorph clean removes isolated pixels (1's surrounded by 0's)?
Use bwareafilt or bwareaopen.

3 years ago | 1

Answered
fmincon stopped when Norm of step is far larger than StepTolerance
Probably. You can check the output structure to see if a 4th iteration was done, [x,fval,exitflag,output] = fmincon(___)

3 years ago | 0

| accepted

Answered
selecting units for (1) scaling of variable and (2) condition number minimization
You are free to translate as well as scale your optimization variables (or make any other nonlinear 1-1 transformation that migh...

3 years ago | 0

Answered
Implicit plot not working.
warning off fimplicit(...) warning on

3 years ago | 0

Answered
Find minimum consecutives in an optimvar
It's going to be a nonlinear integer objective function, which means the solver it's going to choose is ga. You should save your...

3 years ago | 1

Answered
Insufficient number of outputs from right hand side of equal sign to satisfy assignment
data={1,2}; [a,b,c]=data{:}

3 years ago | 0

Answered
Does matlab have any catenary curve fitting toolbox ?
fit lsqcurvefit

3 years ago | 1

Answered
Error using .' TRANSPOSE does not support N-D arrays. Use PAGETRANSPOSE/PAGECTRANSPOSE to transpose pages or PERMUTE to reorder dimensions of N-D arrays.
I is an RGB image. Perhaps you meant to convert it to grayscale.

3 years ago | 0

Answered
Eigenvalue problem optimized with lqsnonlin
% M matrix M = diag([1e3, 1e3, 1e3, 1e5, 1e5, 1e5]); M(1,4) = 100; M(4,1) = 100; M(1,5) = 150; M(5,1) = 150; M(2,6) = 10; M(6...

3 years ago | 0

| accepted

Answered
correct Creation of a 3D AlphaShape from Matrix
This might be what you want, but I can't tell for sure. It sounds like you're just trying to do a trisurf plot. load testfile.m...

3 years ago | 0

Answered
How to prove that a destructor must be defined for the Value classes
How can I prove that Value classes require users to build a Destructor function You cannot prove this, because it is false. Val...

3 years ago | 0

Answered
How to obtain a function through 3d points
I would like to obtain the function of a 3D curve (in my case, a helix) that fits a list of points of (x, y, z) coordinates The...

3 years ago | 1

Answered
Difference between 2 images?
You haven't really given us a clear idea what is unknown or what the challenge is. For example, it is not clear whether you know...

3 years ago | 1

Answered
how to preferentially compute vector products rather than matrix products
Is there any way to change this setting without bracket? I doubt there is, but it's the kind of thing that should probably be h...

3 years ago | 0

| accepted

Answered
Edge Detection in a 2D Matrix
% a logical image mask = imread('tinyblobs.png'); outerboundary = imdilate(mask,strel('disk',1))&~mask; imshow(mask+2*out...

3 years ago | 2

Answered
deleting all rows from column 1 with duplicates in column 2.
setdiff(Column1,Column2)

3 years ago | 0

| accepted

Answered
Correct homograph or projective transformation of an inclined image
You need 4 non-colinear landmarks in the image, for which you know the real-world coordinates. Then you can use fitgeotrans or f...

3 years ago | 0

Answered
i want to get adjacency matrix of a network
Easier: function adj_matrix = generate_adjacency_matrix(n, p) adj_matrix=triu(rand(n)<p,1); adj_matrix=adj_matrix+a...

3 years ago | 0

Answered
Flipping the elements of a vector
First of all, I hope it is clear that you would never really flip a vector using either of the functions you've created. You wou...

3 years ago | 0

Answered
Edge and corner detection using Hough Transform
Because you are detecting edges/corners of a simple convex polygon, I would recommend downloading pgonCorners, https://www.math...

3 years ago | 1

| accepted

Answered
How to extract matrix elements corresponding to a logical matrix?
[I,J]=find(A==2); Q=A(min(I):max(I), min(J):max(J));

3 years ago | 1

Answered
How to extract matrix elements corresponding to a logical matrix?
P=(A==2); Q=A(any(P,2), any(P,1))

3 years ago | 1

| accepted

Answered
how to plot 3d oval shape with 81 nodes
An "oval" is a loose term. If you mean an ellipsoid, then you could use this FEX download, https://www.mathworks.com/matlabcen...

3 years ago | 0

Answered
Efficiently moving values in a 3-dimensional array
It will be much more efficient if you use the data ordering my_array = rand(n_columns,n_rows, n_populations) I will assume you'...

3 years ago | 0

| accepted

Answered
Efficient summing of parts of an array
I would recomend that you maintain the 4D array in ndSparse form instead, https://www.mathworks.com/matlabcentral/fileexchange/...

3 years ago | 0

| accepted

Answered
Angle between a vector and xy, xz, and yz planes
P1=[12,14,78]; Angles = 90 - acosd(normalize(flip(P1),'n'))

3 years ago | 2

Answered
Indexing in nested loops x 3
You are using '==' in several places in your code. When you do so, you must remember the limitations of floating point math, 0....

3 years ago | 0

| accepted

Answered
find duplicated rows in matlab without for loop
[~,I]=unique(x,'rows'); locations=setdiff(1:height(x),I) %locations of duplicate rows

3 years ago | 0

| accepted

Answered
While using fit function, how to make sure the generated fit is only of the range of data points ?
A fit does not have an inherent "range". Once the fit is computed, you can plot it over any range of x values that you wish, e.g...

3 years ago | 1

| accepted