Answered
Fill area with random circles having different diameters
Here is a demo that uses rejection sampling and Delaunay triangulation <</matlabcentral/answers/uploaded_files/121175/circle_...

nästan 6 år ago | 1

Answered
Plotting discretized field in 2D
Here is an example: x_lim=[0 20]; x=linspace(x_lim(1),x_lim(2),11); [X,Y]=meshgrid(x); F=randn(size(X)).*X-ran...

nästan 6 år ago | 1

| accepted

Answered
How to solve transcendental equations in matlab
This is a complex-valued function. Just from visual inspection, it is apparent that the real part of this function has infinitel...

nästan 6 år ago | 0

| accepted

Answered
legend children empty, but need to set transparency
I had the same problem. I couldn't figure out a way to resolve it in Matlab, so instead I exported the graph as it was and then ...

nästan 6 år ago | 0

Answered
Integration of discrete data which have a non-linear relationship
Numerical integration based on Simpson's rule provides greater accuracy than integration using trapezoidal rule. Here is an impl...

nästan 6 år ago | 0

| accepted

Answered
Contour plot with 3 variables
% Grid y=70:160; x=0:60; z=10:80; [X,Y,Z]=meshgrid(x,y,z); % Evaluate function at grid points F=-1.69*X ...

nästan 6 år ago | 0

Answered
Complex numbers input in neural networks
You can represent a complex number, a+i*b, as a 2-vector [a b], so use that format instead. Suppose that F is an array of comple...

nästan 6 år ago | 1

| accepted

Answered
How can I place spheres along a circle/ring ?
See example below. All relevant functions used to generate this example can be found <https://drive.google.com/open?id=11Rc5WKrq...

nästan 6 år ago | 1

| accepted

Answered
Is it possible to plot Surfaces at specified coordinates?
If in addition to the vertices sampled from the surfaces you also have the connectivity information among the vertices, you can ...

nästan 6 år ago | 0

Answered
How to plot a function on a cylinder surface
Here is an example: % Right cylinder parameters z_min=0; % lower cut-off point z_max=4; % upper cut-off point ...

nästan 6 år ago | 2

| accepted

Answered
Is it posible in Matlab to model surface using spherical harmonics (SH) basing on 3d data? If yes, how can I do it.
If the surface in question is closed (i.e., no boundaries) and is genus-0 (i.e., ho holes or handles), then it is indeed possibl...

nästan 6 år ago | 0

| accepted

Answered
solving system of equations using singular value decomposition and fsolve
This is an overdetermined system (i.e., number of equations > number of variables). You can obtain least squares solution as X=(...

nästan 6 år ago | 1

Answered
How do I display 55x305x4 .mat file as an image in Matlab and save it ?
% Data array A=Position3DGrid; % Convert to uint8 I_min=min(A(:)); I_max=max(A(:)); A=uint8(255*(A-I_min)/(...

nästan 6 år ago | 0

Answered
From .stl to mathematical function. Is it possible?
If the object is has a relatively simple geometry and you want to get a compact description of its shape, one of the following r...

nästan 6 år ago | 1

| accepted

Answered
How can I accurately plot the centroid of black dots in MATLAB?
% Get the image im=imread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/120388/MATLAB_QUESTION.PNG'); ...

nästan 6 år ago | 0

| accepted

Answered
Finding the part of a larger matrix that is most similar to a smaller matrix
Here is another example, in case you dont have an Image Processing Toolbox: % Random N-by-N matrix N=1E3; % ma...

nästan 6 år ago | 0

Answered
open an image in another image
Here is an example: im1=imread('peppers.png'); im2=imread('football.jpg'); im3=im1; im3(1:size(im2,1),1:si...

nästan 6 år ago | 0

| accepted

Answered
How to hightlight the mask in a image
Here you go: im=imread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/119871/test1.png'); % grayscale ...

nästan 6 år ago | 0

Answered
Converting a stack of .bmp images into an .stl file
(1) Segment the object of interest in your 3D image, (2) Reconstruct boundary of the segmented object using 'isosurface' func...

nästan 6 år ago | 0

Answered
could anyone tell me how to save the values while the code is getting executed
save('FileName.m','name_of_variable_you_want_to_save')

nästan 6 år ago | 0

Answered
How i can convert cell (each element in cell with different length) to array?
Is this kind of what you are looking for? ex = {[1,2,4,5,7,11,12],[1,3,4,5,7,11,12],[1,2,4,6,5,7,11,12],[1,3,4,6,5,7,11,12]...

nästan 6 år ago | 0

| accepted

Answered
how to find maximum value in a matrix?
Demo of local search based on 4-connected neighbourhood: <</matlabcentral/answers/uploaded_files/119785/conn_4.jpg>> Demo ...

nästan 6 år ago | 1

| accepted

Answered
How to divide the brain segmented slices in left and right compartments (halves)?
The simplest way to approach your problem is to (1) Aggregate all (segmented) slices from a given 3D image to form a volume ...

nästan 6 år ago | 0

Answered
3D array permutation
Suppose you have G, which is a Y-by-X-by-Z 3D array, then i-th xy slice: G_yx=G(:,:,i); % Y-by-X array i-th xz slice...

nästan 6 år ago | 0

Answered
done , finish the task
You have to apply watershed algorithm to the original (grayscale) image, not the binary one. Can you post the code you are using...

nästan 6 år ago | 1

| accepted

Answered
How to find and draw boundary on some parts of an object in image?
Is this what you are looking for? im=imread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/119409/Imag...

nästan 6 år ago | 0

Answered
Detecting centroid and orientation of capsules
If your capsules have parametric a representation (e.g., ellipsoid), you can use Hough transform (HG). Description of a HG varia...

nästan 6 år ago | 1

Question

Setting 'FaceAlpha'<1 for a patch object causes x- and y- axes of the plot to dissapear. Why and how can this be corrected?
Hello everyone, have any of you ever plotted a 2D patch object and noticed that upon altering its 'FaceAlpha' value below 1, ...

nästan 10 år ago | 1 answer | 0

1

answer

Answered
Dividing a triangle into equal parts
Suppose you have a triangle defined by the vertices A, B and C. To subdivide this triangle into n triangles of equal area you ca...

mer än 11 år ago | 0

Answered
Point inside triangle(s)?
Hi Sven, I have encountered this problem many times in the past. I am aware of at least two approaches to solve it. The first...

mer än 11 år ago | 1