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Content Feed
Time dependent heat transfer
@Bruce Griffin, here is the code that does the simulation. The original incorrect answer equation is in the code, but it is com...
27 days ago | 0
Time dependent heat transfer
@Bruce Griffin, I added code to do an actual simulation. I found an interesting and instructive result. When numx=1000 and numt...
28 days ago | 0
Time dependent heat transfer
@Bruce Griffin, Change nmax from 1 to 500. I really like how you used meshgrid to generate all the time, position combintions ...
28 days ago | 0
| accepted
Time dependent heat transfer
@Bruce Griffin, You said the third [side] is at 100. That is not true. This problem has one spatial dimension and one time dime...
28 days ago | 0
How to define a path from a set of x-y points and estimate its smoothness?
@Luigi Truppa, Example with two paths, each with 51 waypoints. Path A is a sequence of random points. Path B is a circle. ...
28 days ago | 0
How to compute the average path from scattered data (and its variance)?
@Alberto Bacchin, here's another plot you can make, if you use the mean-of-the-normalized paths approach (pathSimulateAndAverage...
29 days ago | 0
How to compute the average path from scattered data (and its variance)?
@Alberto Bacchin, Since you said you do not care about time, it is OK to normalize all the paths to have the same number of ste...
29 days ago | 0
Filling incomplete data with cftool
@Nicolas Silva Schmalbach See attached. %replaceNaNs.m WCRose 20210928 %Replace NaN values in array with interpolated value...
30 days ago | 0
| accepted
Output data to text file
@Tyler Bodnarik, On Matlab 2021, use writetable() or dlmwrite(). See help for each. On Matlab 2018, use dlmwrite(), since writ...
30 days ago | 0
| accepted
How to compute the average path from scattered data (and its variance)?
@Alberto Bacchin, This is a good question which arises in slightly different forms in a wide array of problems. One example: ho...
1 month ago | 0
Hi. I'm trying to plot a polynomial function but I'm not getting the desired output. Can you tell me what I'm doing wrong?
@Zainab Waqar, replace x=-2:1; with x=-2:.01:1; to get a step size of .01, instead of a step size of 1. Good luck! ...
1 month ago | 1
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...
1 month 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...
1 month ago | 0
Curve fitting and convergence to estimate two coefficients
Here is fitDataPolyStart.m.
1 month 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...
1 month 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...
1 month 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...
1 month 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...
1 month 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...
1 month 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...
1 month 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 ...
1 month 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...
1 month 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 ...
1 month 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...
1 month 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...
1 month ago | 0
| accepted
Row to column matrix
@armin m, See the following: a=[1,1+i,-1+i] b=conj(a')
1 month ago | 0
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...
2 months 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...
2 months 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...
2 months 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.. ...
2 months ago | 1
| accepted
