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darova


Last seen: Today Active since 2019

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Answered
isosurface with wall thickness
What abouy simply to make thicker a lines? [x,y,z] = peaks(30); surf(x,y,z,'linewidth',3)

9 hours ago | 0

Answered
how do i continuously calculate an output with an increasing input of angles ?
You need to make wi vector the same size as wj and wk wi = [-w_n+theta*0 0 0]; % i component of W

9 hours ago | 0

Answered
How to get the curvature of a meshed surface?
Here are some ideas: Simple way: Precise way:

9 hours ago | 0

Answered
Change the value of independent variables to solve the dependent variable equation
Use function handle x = 0:.1:10; f = @(a) sin(a*x); plot(x,f(2),'r') line(x,f(5))

9 hours ago | 0

Answered
Detecting circles in noisy images with high intensity variations (must work for all cases)
Is the circle the only figure of closed form? A0 = imread('Sem Título.png'); A1 = im2bw(A0); A2 = imdilate(A1,ones(10)); ...

9 hours ago | 0

Answered
Detecting black blob (mouse) in .tif frames
Here is the siple script that does the job A0 = imread('img1.png'); A1 = im2bw(A0,0.2); montage({A0 A1})

1 day ago | 0

Answered
Plot lines from FEM (PDE) stress vectors
% generata data n = 20; % number of points x = rand(20,1); y = rand(20,1); u = rand(20,1); v = rand...

1 day ago | 0

| accepted

Answered
Can this loop containing different indices be vectorized using implicit expansion (or otherwise)?
Simply remove keywords for and end. Don't forget about element wise operator (dot)

1 day ago | 0

Answered
Plot a moving wheel in the 3D space
% create model t = linspace(0,2*pi,10); [x,y] = pol2cart(t,1); X = [y*0;y*0;y*0+2;y*0+2]; Y = [y*0;y;y;y*0]; Z = [x*0;x...

3 days ago | 0

Answered
How to Draw an ellipsoid between two 3d coordinates
Use rotate to rotate the ellipsoid

3 days ago | 0

Answered
FEM : plotting stress field in each T3 element
Here is an example: [x,y] = meshgrid(-2:0.2:2); % x,y range z = x.^2+y.^2-4; % z value h0 ...

3 days ago | 0

Answered
Specifying condition criteria for while loop iteration
Did you try to assume the sign of the function value? Derivative can be positive and negative regardless of the value Maybe s...

3 days ago | 0

Answered
How to get the volume and surface area of separated isosurfaces
Use bwlabel to separate each blob

3 days ago | 0

Answered
How to find opposing triangle pairs in triangulated objects?
Here is an idea or finding neigbour points; % some data x0 = rand(40,1); y0 = rand(40,1); s1 = max(max(x0)-min(x0),max(y...

3 days ago | 0

Answered
vector of line chart objects returned by plot - problem with modifying markers,...
Try this x = 0:10; y = sin(x); h(1) = plot(x,y,'r'); h(2) = line(x,y+.5); set(h(2),'marker','.')

4 days ago | 0

Answered
maps and isolines on the map of the continents
What about this? t = 0:0.02:2*pi; % angle r = 1 + 0.1*cos(10*t); % radius [x0,y0] = pol2cart(t,r); % calcu...

5 days ago | 0

Answered
Solve a complex differential equation over different intervals
Here are some notes: there is no need of creating special mesh. You have 3d order diff equation so you need 3 yinit yinit = [p...

5 days ago | 0

Answered
Transform a Numpy array of a mask
Assume A is your 3D matrix (1024x1024x3) A1 = A(:,:,1); % extract first matrix

5 days ago | 0

| accepted

Answered
Extracting points from polyshape
See this link about curve interpolation: LINK Saving the data as a picture is a good idea too: try print x = 0:20; y = sin(x)...

5 days ago | 1

Answered
How to create membership functions matlab in triangular form?
Use sine wave x = 0:pi/2:20; y = sin(x); plot(x,y)

2 months ago | 0

Answered
Draw arc with specified angle difference
Wha about this representation? s = load('data.mat'); t = linspace(0,1,20)*pi/180; % angle array [X,Y,Z] = deal( ze...

2 months ago | 0

Answered
How to show two axis on a plot only where i want them
try this yticks h = plot(0:10,sin(0:10)); yy = 0:0.2:1; [x,y] = ndgrid([0 10],yy); line(x,y) yticks(yy)

2 months ago | 0

Answered
Volume of a solid of revolution for a cross section by points
Looks like simple ellipsoid. Try alphaShape n1 = 50; % circle points n2 = 10; % number of circles [x,...

2 months ago | 0

Answered
Generate distinct geometric shapes by using radius ?
Here is ax example t = linspace(0,2*pi,4); % triangle [x,y] = pol2cart(t,30); % cartesian coordinates % move tria...

2 months ago | 0

Answered
How to rotate a figure around an origin that is rotating?
Try this t = linspace(0,2*pi,20); [x,y] = pol2cart(t,1); n = 6; % number of small circles h = zeros(1,n)...

2 months ago | 0

| accepted

Answered
How can I convert a surface plot to an Occupancy map 3D?
What about isosurface? [x,y,z] = peaks(20); z = (z-min(z(:)))/(max(z(:))-min(z(:)))*19; % scale values inbetween [1 .. 19...

2 months ago | 0

Answered
How to create volume out of surfaces?
Your object looks symmetrical. Try manually to create surface p1 = isosurface(...); p2 = isosurface(...); v1 = p1.vertices; ...

2 months ago | 0

Answered
How can I fade Contour Lines on to the Binscatter plot?
You can extract edge of the region (yellow squares) using boundary [y,x] = im2bw(A); k = boundary(x,y); Then use i...

2 months ago | 0

Answered
Plotting cone and hyperbola
Here is an example [T,R] = meshgrid(linspace(0,2*pi,20),0:5); [X,Y] = pol2cart(T,R); Z = R; % Y = 7.46/(x+5.10) -0.86 is the...

2 months ago | 0

Answered
find the minimum distances of all points from neighboring points
Program is slow because of pre-allocation and calling pdist2 everytime try this D = pdist2(centroid,centroid); D = D + eye(si...

2 months ago | 0

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