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darova


Last seen: Today Active since 2019

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Answered
3D surface reconstruction from 2D image recorded through a prism
Try something like this: % [xw3,yw3,zw3] - 3D positions of white markers % [xw2, yw2] - 2D positions of white markers % [x...

5 hours ago | 0

Answered
How to solve exceed number of array element (1) problem?
Here is the problem. You are redefining the variable inside for loop and it has (1) element again

6 hours ago | 0

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Answered
Results are NaN or absurd if a certain parameter changes.
I suggest you to visualize the data in 3D. See how values change each step T = zeros(20); a = 0.04; % consta...

7 hours ago | 0

Answered
How to calculate an area with obtained nodes?
An example of boundary function. polyarea is used to calculate area r = 1; x = linspace(-1,1,20); y = sqrt(r^2 - x.^2); x = ...

7 hours ago | 0

Answered
How to count white pixels in Watershed segmented image?
Here is an example with using bwlabel A = zeros(100); t = linspace(0,2*pi,1000); % a lot of points [x,y] = pol2cart(t,1)...

1 day ago | 0

Answered
aligning data for fprintf
Here is ax example a = rand(10,1)*1e4; sprintf('a = %7.2f\n',a')

1 day ago | 0

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Answered
Plot a sine wave with decreasing frequency over time
Modify x coordinate x = 0:.1:30; y = sin(x); x1 = x - 10*(x/max(x)).^2; % shift last point 10 units plot(x1,y)

1 day ago | 0

Answered
Simulate a dot moving in an ellipse
Use pause() t = linspace(0,2*pi,20); x = 5*cos(t); y = 3*sin(t); h = plot(5,0,'.r'); line(x,y) for i = 1:20 set(h,'xd...

2 days ago | 1

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Answered
Estrarre l'intervallo di dati impostando il valore sulla matrice
Use griddata to interpolate the data Use slice to create slices

2 days ago | 1

Answered
plot 2D matrix data
Use griddata to create matrices

3 days ago | 0

Answered
Is there anyway to Re-grid one dataset to another dataset resolution without interpolating??
Maybe this A = ones(3,3); B = [A;nan(6,3)]; C = reshape(B,3,[])

3 days ago | 0

Answered
How can i draw graphene first brillouin zone using matlab?
Here is ax example t = linspace(0,2*pi,7); [x,y] = pol2cart(t,3); surf([x;x],[y;y],[x*0;x*0+1],'facecolor','none') axis equa...

3 days ago | 0

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Answered
Need to access the structure values in numerical form and store it in an array each time the loop runs
Make some modifications An example syms x y sol = solve([5*x-y y-1])

3 days ago | 1

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Answered
How to compare solution of ODE for each time step?
Maybe you are looking for event option. Then just place ode45 insife while loop t0 = 1; while contdition [t,x] = ode45(f,...

3 days ago | 0

Answered
How to integrate the indices of a vector of doubles?
Sure t = linspace(0,1,12054); S = trapz(t,AT);

3 days ago | 0

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Answered
trying to use integral transform to multiple large arrays but getting an error about array being too large to calculate
Maybe you need just interpolate the data to make the same size % x data with 88000 elements t1 = linspace(1,88000,15001); ...

3 days ago | 0

Answered
how to export two mat.files into a single excel sheet?
Read all your files using load Write all the data using writematrix

3 days ago | 0

Answered
Plotting letter "D" on 3D space
3D letter D r = [1 1.5 1.5 1 1]; % radius of a circles t = [-20:10:200 -20]'*pi/180; % closed contour [T...

4 days ago | 0

Answered
How to restart a for loop when specific condition is met?
Place for loop inside while loop k = 0; while k < 5 for i = 1:10 if i > 5 k = k + 1; b...

4 days ago | 1

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Answered
extracting sub matrix from a cell array
Try data1 = data{1}(:,3:8)

4 days ago | 1

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Answered
how can I plot a matrix against two other ones? (need to a matrix 3d plotting )
Use surf [x,y,z] = peaks(30); h = surf(x,y,z); for i = 1:20 z = z + 0.5*rand(30); set(h,'zdata',z) pause(0.5) ...

6 days ago | 0

Answered
Finding the intersection points between two curves
I'd try fsolve for solving Read help carefully: fplot(f,[0 10])

6 days ago | 1

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

7 days 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

7 days ago | 0

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

7 days ago | 1

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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))

7 days ago | 0

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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)); ...

7 days 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})

8 days ago | 0

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