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Adding members to a matrix changes other members in the matrix
It is simply the display on screen that scale the data to largest value. The data is untouched interally.

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Smoothing/splining data with a limit to the slope of the smooth fit
Using this File Exchange, its is not easy to find a combination of parameters to make it "works". I think it is difficult and th...

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How can I compute the Area and the Centroid of the following shape?
xA = 0; xB = 1; a = 9.2; c = 0.5; sfun = @(x)sigmf(x, [a c]); Area = integral(@(x)sfun(x),xA,xB); xc = integral(@(x)...

casi 4 años hace | 2

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Minimizing an equation to 0
This minimize the frobenius norm, or l2 norm of the vectorized residual matrix (divided by sqrt(numel(A)) you'll get the rms) k...

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Why ''int'' and ''integral'' return different answers
I think the problem is more subttle than the simple presence of singularities. Some "mild" singularity can be handlle correctly ...

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How do I plot this set as 3d region in matlab?
Code that plot ALL the boundaries of the domain x = 0; y = 0; c = 1+x^2+y^2; f1 = @(u,v,z) z - (u.^2 + v.^2 + c); f2 = @(...

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Randomise vector numbers to maximum variance
A = repmat([10 repmat([repmat(0, 1, 2), 1 repmat(0, 1, 2)], 1, 5)], 1, 20);

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How od i generate random numbers whose sum is constant?
If the numbers are supposed to be >= 0 with precribed sum, a simple method is n = 100; s = 10; Y = -log(rand(1,n)); X = s ...

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How od i generate random numbers whose sum is constant?
Check this out https://uk.mathworks.com/matlabcentral/fileexchange/9700-random-vectors-with-fixed-sum

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isqnonlin: compute part of objective function outside of matlab
"The gradient vector of the objective function res with respect to the parameters p is calculated like this: d(res)/d(p) = 2*(s...

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What is the best function of the following shape?
Try this: xmin = 1; xmax = 3; pp = struct('form','pp',... 'breaks',[-1e-100 0 1 inf],... 'coefs',[0 0 0 0 0 0;6,-...

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need general coding/ command to separate matrix data
Try this: % Fake data finalmatrix=sortrows(randi(10,30,3),1) y = finalmatrix(:,1); n=diff(find([true; diff(y)~=0; true])) ...

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Replacing Arrays and Matrices
IMO nothing hurts of using same variable name for different things. But my experience tell me that is a bad habit of programmin...

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where the jump of the phase function happen?
angle(z) is discontinue at the half line { y=0; x<=0, z=x+1i*y }. The phase jumps from -pi for imaginary part y < 0 to +pi for ...

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How can I integrate a function related to the modified bessel function of the first kind?
You can also "vectorize" distribution_func by applying arrayfun beta = 5 ; sigma = 1.4/3; integ_func = @(theta,x) x./sigma.^2...

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adding counts of ordered pairs
A1=[1 4 3; 3 5 1; 12 4 7; 13 5 2; 14 1 1]; A2=[1 5 1; 13 5 1; 13 7 3; 14 1 5]; A12=[A1; A...

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How to simulate Poisson Distribution Process?
Another way based on exponetial distribution, which is the time between 2 events % Generate n random integers follow Poisson wi...

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Parallel rank calculation for sparse matrices -- suggestions?
For thin and tall sparse matrix A of size (m x n), m>>n and n in the order of 1000s, it might be possible to compute the rank us...

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How to simulate Poisson Distribution Process?
If you don't have staistics toolbox % Generate n random integers follow Poisson with parameter (==mean) lambda lambda=3; n =...

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Fitting a monotonically increasing spline function
One way is to use my https://uk.mathworks.com/matlabcentral/fileexchange/25872-free-knot-spline-approximation x = [0., 0.75, ...

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How to constrain the resulting equation from a polynomial surface fit to a positive range?
This is implementation of Torsen's idea data=readmatrix('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1116665...

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Using linprog but it's only returning 'Optimal solution found' with no feasible solution?
It looks solution is correct to me. Note that the Aeq = [] meaning you don"t supply equality constraint, so I need to check for...

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Error in finding the angle between three points using atan2
142.9 degree seem right to be. If you don't make the same aspect ratio of x and y with axis equal, angles are deformed on your s...

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linear independent set formation
t = rand(1,7)*2*pi; independent = rank(cos((0:6)'.*t)) == 7

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Find all paths in a graph with distance, previous nodes
It is not clear what you want to achieve but you might take a look at this function https://uk.mathworks.com/help/matlab/ref/gr...

casi 4 años hace | 0

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Interpolating Missing Data with Noise like Brownian Motion
"What might be the best way to do this?'" Interpolation THEN adding noise. There is no reason to mix the noise generation wit...

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Rotating a point cloud fails
The last index of this line should be 3 V = rotation_mat*[V1(:,1) V1(:,2) V1(:,2)]'

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Find the intersection of two lines with multiple intersections.
% Basic Variables k_prime = 1000; np = .85; P = 750; rho = 1.225; S = 25; W = 1600*25; Cl_max = 1.5; k = .05; Cdo = .025; Cd =...

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Intersection of two parametric circles in R3
Please try this : % Generate fake data xyz1 = rand(3,1); xyz2 = rand(3,1); xyz = rand(3,1) dxyz1 = xyz1-xyz; ab = dxyz1(...

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I don't understand the behavior of discretize
The doc saids "discretize divides the data into N bins of uniform width, choosing the bin edges to be "nice" numbers that overl...

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