All Questions
Tagged with curve-fitting matlab
6 questions
2
votes
2
answers
334
views
How to curve-fit the lower envelope of random sequence?
I'm more or less familiar with procedures and methods to fit a curve to experimental data, and I have done this many times using Matlab. However this time I have a problem that I'm not sure how to ...
- 21
0
votes
0
answers
71
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Fit exponential convergence
I'm working with a numerical algorithm whose output $y$ asymptotically approaches a certain unknown value $a$.
I expect an exponential convergence, i.e. the data $y$ given by my algorithm should be ...
- 203
1
vote
1
answer
699
views
matlab lsqcurvefit parameter estimation journey
The lsqcurvefit solution in matlab converges at different solutions depending upon the initial guess:
Surface represents the error (SSE) between model and data at various combinations of parameters ...
- 13
0
votes
0
answers
149
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1D fit on a surface in matlab
I have a problem fitting a $N\times N$ ($32\times 32$ in this case) matrix in Matlab.
Here is the deal
I have this image, and I want to create 1 dimensional fit between the points and then be able ...
- 9
1
vote
1
answer
290
views
Curve Fitting problem MATLAB
I have a system of differential equations with some unknown parameters and I need to find the optimal parameter set that fits best with the data I have.
For each parameter set choice (using for loops)...
- 47
1
vote
0
answers
2k
views
Piecewise linear approximation of an experimental data curve. Knots position constrained
I need to fit a curve, obtained from experimental data, with a piecewise linear model (4 knots and therefore 3 lines).
I tried using the MATLAB function
...
- 402