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**Content Feed**

Curve fitting and convergence to estimate two coefficients

@Anand Rathnam, I was bothered by the poor performance of fmincon() on this problem. Even when we tried starting at multiple lo...

5 días ago | 0

| accepted

Curve fitting and convergence to estimate two coefficients

@Anand Rathnam, I also wrote the attached script: myModelTest.m. This script calls test myModel to make sure it gives reasonab...

5 días ago | 0

Curve fitting and convergence to estimate two coefficients

Here is fitDataPolyStart.m.

5 días ago | 0

Curve fitting and convergence to estimate two coefficients

@Anand Rathnam, Here is a new main program fitDataPolyStart.m, that tries multiple starting points, to reduce the chance of fin...

6 días ago | 0

Curve fitting and convergence to estimate two coefficients

@Anand Rathnam, Your code was a very good start. There were two fatal errors. ONe is that when you call fmincon(), you must pa...

6 días ago | 0

Curve fitting and convergence to estimate two coefficients

@Anand Rathnam, fmincon() is a multidimensional minimization routine. By multidimensional I mean it adjusts multiple unknown p...

7 días ago | 0

Given the matrix 𝐴, use MATLAB to compute 𝐴𝐴 𝑡 .

@yihan wang, For a real matrix, A' is Matlab code for the transpose of A. Therefore: A=[6,-2,-1,0;3,-5,0,-3;10,5,0,-1;-1,3,4,1...

7 días ago | 0

How can I obtain 20 frames of noise?

@Rahul Shah, do your frames have one or two dimensions? I will assume you mean 2D frames. Let's assume each frame is 32x32. The...

7 días ago | 0

| accepted

How to best modify FFT bin amplitudes before IFFT (DFT, windowing)?

@Pythagorean, You say "For FFT. I understand that the first half of the resulting frequency bins are the bins with the relevant...

7 días ago | 1

| accepted

ODE Classes: Numerical Integration

@kileigh palmer, This site https://www.mathworks.com/help/matlab/math/summary-of-ode-options.html says the Jacobian option is ...

9 días ago | 0

calculate summation of vectors

@Kha Le, This sounds a lot like a homework question. Hints: Break it into two parts: the sum of the unsquared terms plus the su...

9 días ago | 0

| accepted

Plz help how can i do this

@eman baky, Your quesiton is not eassy to read bcause you have formatted parts of your question as code that should not be. I ...

9 días ago | 0

Hi everyone, i want to ask about curve fitting problem,

@laurensius adhitya, One set of four numbers (a,b,c,d) is not enough to determin the four unknowns (k1,k2,k3,k4). You need fou...

9 días ago | 0

Specify Bounds Vpasolve Two Unknowns

@John, I would use simple geometry. You say "Coordinates of the centre of the circle (y,z) should be within the bounds 12.5 and...

9 días ago | 0

| accepted

Z-angle of a fit-plane having 4 points

@Gaetano Pavone, In my previous post, I supplied a script (fitPlane3a.m) that finds the plane that is the best fit to 4 or more...

16 días ago | 0

Z-angle of a fit-plane having 4 points

@Gaetano Pavone Here's a script (attached) that fits a plane to 4 or more points. It fits by ordinary least squares, which mea...

17 días ago | 0

Z-angle of a fit-plane having 4 points

@Gaetano Pavone, YOu also requested help for how to plot the plane, the points, the normal vector. See attached. This is for th...

17 días ago | 1

Z-angle of a fit-plane having 4 points

@Gaetano Pavone, Here is code to find the unit normal to a plane defined by three points, and then the angle with the z-axis.. ...

18 días ago | 1

| accepted

Using gausswin function and iFT'ing data

@Cheggers, you are correct, you can use the same variable name for an input to the function and for an output from the function....

18 días ago | 0

Intersection between two functions

@Behbod Izadi, syms x S=solve(2.2/sqrt(2*9.81*x) == tanh((3.5/(2*4.5))*sqrt(2*9.81*x)),x) gives an answer. Is it reasonable? ...

18 días ago | 0

Filter recurring oscillation in 2D Data

@DGM, @Konvictus177, I cannot see diagonal banding. The arrows added to th image point to a vertical line, not a diagnonal feat...

18 días ago | 0

Using gausswin function and iFT'ing data

@Cheggers OK, I am glad if my earlier comment served as an answer to your probelem. I still think function windowFID() has a p...

18 días ago | 0

How to fill a matrix with formulas

@aziz monavar, I see from your comment that you want the transpose. Therefore do this: y=zeros(1,20); y(1)=0.4; for i=2:20, ...

18 días ago | 1

Z-angle of a fit-plane having 4 points

@Gaetano Pavone, Is each data point a set of 3 coordinates? If the answer is yes, then do you know the x and y values exactly?...

18 días ago | 0

How to fill a matrix with formulas

@aziz monavar, You have a matrix y(i,j) but your formula is only for y(i). That is the problem @John D'Errico identifies. If y...

19 días ago | 0

Spline interpolation for angular data

@mukesh bisht, I suspect my earlier proposal won't work as I suggested, because the x-values passed to spline() must be unique....

alrededor de 1 mes ago | 0

Spline interpolation for angular data

@mukesh bisht, The shape of the fitted spline at each point depends on points before and after that point. The curves do mot m...

alrededor de 1 mes ago | 0

Relationship between 2 poly curve/ 2 data sets , how can I correlate it ?

@Eric Aw, Here is an implentation of my previous suggesitons. The attached code produces the console output and the plot below....

alrededor de 1 mes ago | 0

| accepted

Relationship between 2 poly curve/ 2 data sets , how can I correlate it ?

@Eric Aw, See my quesitons in the ealrier comments. I moved your data into a text file (attached) and made a few tweaks to you...

alrededor de 1 mes ago | 0