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How to NOT share variable with nested function?
If you declare function or variable inside nested function it rewrites itself. There is no option for mistake function main a ...

3 years ago | 0

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Rotate the centre plate in a geometry
You can rotate it using rotation matrix Or you can use rotate()

3 years ago | 0

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How to create a single gobjects for different plots to avoid using clf
Try this way x = 0:.2:10; y1 = x + nan; y2 = x + nan; h1 = plot(x,y1,'r'); h2 = line(x,y2); for i = 1:length(x) y1(i)...

3 years ago | 0

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ODE 45 couldn't solve the differential equation.
Try this way psol = []; for k = 1:3 ode_ = @(z,Pp) (-ap + (((sca*nc)-(sac*na))*Tp*Nt(k)*Pp))'; psol = [psol; ode45(o...

3 years ago | 0

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How can I change the line colour in a geoplot based on data?
Try set h1 = geoplot(..); set(h1,'color','r')

3 years ago | 0

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Ignoring certain matrix entries with surf plot
Don't use '==' equal sign for comparing double numbers ii = abs(MatrixName-0)<0.1; % precision MatrixName(ii) = NaN;

3 years ago | 0

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how can i let all number in matrix X between 0~1?
It's called scaling A1 = (A-min(A(:)))/(max(A(:))-min(A(:))) *1;

3 years ago | 0

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How to place/ define points on a triangulated meshed surface?
How about simple griddata with using initmesh t = 0:.2:5; x = [t; t]; % some data y = [t*0; t*0+3]; ...

3 years ago | 1

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RK 6 method giving large errors
First of all you should rewrite your code to make more readable. The code is very difficult to to check. Make it as clear as pos...

3 years ago | 2

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How to 3D plot eight 4x4 matrices to form a cuboid?
What about cylinder? r = sqrt(2); t = linspace(0,2*pi,5)+pi/4; z = [0 0 1 1]; [T,Z] = ndgrid(t,z); [X,Y] = pol2cart(T,r); ...

3 years ago | 0

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How can I do a spline interpolation with tangent continuity
What about this? I calculated tangent at each point and added points dx = 0.1; % adding points distan...

3 years ago | 0

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Get the percentage of dark spots
Use first matrix of an image (red channel) A0 = imread('image.png'); A1 = ~im2bw(A0,0.8); % select the stick A2 = A0(:...

3 years ago | 1

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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...

3 years ago | 0

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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

3 years 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...

3 years ago | 0

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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 = ...

3 years ago | 0

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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)...

3 years ago | 0

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

3 years 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)

3 years ago | 0

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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...

3 years ago | 1

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Answered
I want to find the value of two constants from an equation with two variables
Try fit

3 years ago | 1

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

3 years ago | 1

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plot 2D matrix data
Use griddata to create matrices

3 years ago | 0

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How can I condense a larger matrix into a smaller matrix based on elements of a vector?
Read about mat2cell

3 years ago | 0

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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 years ago | 0

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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 years ago | 0

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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 years 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 years ago | 0

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

3 years 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 years ago | 0