Linked Questions

4
votes
1answer
2k views

Fitting with two data sets with the same parameters [duplicate]

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2
votes
1answer
2k views

Combined NonlinearModelFit [duplicate]

I'm trying to fit a number of data sets. Each of the sets should evaluate to a simple linear solution.ax+b. The problem is, all data sets have interference from a ...
0
votes
0answers
76 views

fitting different data sets with one same model with NonlinearModelFit [duplicate]

I have a bunch of list data sets, like 6 or 8 of them. They are 2D and look similar. Both x axis and y axis have variance (in each measurement, x axis also changed a little bit).I know the fitting ...
0
votes
0answers
46 views

Simultaneous fitting of polynomial parameters to data [duplicate]

I have two following data-sets: ...
16
votes
3answers
5k views

Finding a fit to a multi-dimensioned function

I have a model function $f:\mathbb{R}^2\rightarrow\mathbb{R}^2$, and a bunch of data points for which I'd like Mathematica to fit for me. Unfortunately FindFit ...
7
votes
3answers
325 views

Fitting data with interdependence

I have an issue, of which I'm not sure it can be solved, with or without Mathematica. I feel as if it should be possible, but I'm quite clueless as to how. Some introduction is required. I'm working ...
2
votes
2answers
924 views

Fitting two sets of equations and two data sets with NonlinearModelFit

I have 2 nonlinear equations of the type: model_shi_real=(((β - γ)/2)*(Cos[π*α/2]/(Cosh[(1 - α)*Log[x*τ]] + Sin[α*π/2]))) and ...
3
votes
3answers
277 views

Simultaneous plotting

For my experiment, I have to simultaneously fit the real part and imaginary part of cavity reflection data which is given here column 1: frequency, column 2: reflection magnitude, column 3: phase I ...
1
vote
2answers
1k views

Problem fitting a exponential function to data points [closed]

finale edit: i found someone who solved my problem via matlab. therefore i wont try out the proposed solutions now, but wont delete my question in case someone might have use for the proposed ...
3
votes
2answers
153 views

Complex Data Fitting

I have a complex data set and I want to fit with a mathematical model using NonlinearModelFit, but an error appears. Following is the data I'm using and the code ...
4
votes
1answer
589 views

Fitting real and imaginary parts of a function

I have an analytic form of a function G[w_] = -I*z0*w/(1 + I*z0*w*a) I know this function can be obtained (up to some overall normalization) from solving a ...
1
vote
1answer
316 views

Fitting bivariate data using FindFit [closed]

I am trying to fit the following bivariate data set using the FindFit function: ...
2
votes
1answer
356 views

Simultaneous minimisation of chi-square

I have a series of data sets with which I would like to fit a model function to simultaneously. In each data set, I have coordinates $\left\{x,y\right\}$ and an error bar for $y$. The data sets are ...
1
vote
2answers
194 views

NonlinearModelFit with indexed parameters

I have an instrument calibration problem for a multi-channel instrument. Some of the calibration parameters are common between channels, while others are per-channel. Toy example: ...
2
votes
0answers
658 views

How to realize Global Fitting with shared parameters, same as OriginPro9.0? [closed]

I have an experimental data from Michelson interference and I can fit the envelope in OriginPro9.0 using Global Fitting with shared parameters. The figure by OriginPro9.0 is like this: However, I ...

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