**991 fitting questions.**

I want to fit the following equation for my experimental data. I used the following code but it does not give the answer. It gives only coordinates. Could you help me to solve this problem?
...

I'm trying to do an insane amount of non-linear fits to large amounts of data sets. However, I found that the NonlinearModelFit is horribly slow.
Here's the setup:
...

Could someone please point me to a tutorial comparing and contrasting the advantages and disadvantages of the many methods to choose from when applying NonlinearModelFit?

I need to fit a model defined by numerical operations to test data and find the parameters of the PDE. The problem is that I have to NIntegrate the result obtained ...

I would like to create the following function:
It should approximate a function func[x] by piecewise polynomial interpolations, splitting the approximate function ...

Taking the example from the Mathematica documentation for Fit, consider the following
...

I have data that I would like to fit with Bessel function
https://www.dropbox.com/s/7se9mb2epbietng/data.dat?dl=0
...

Say I have data that I want to fit to a distribution while applying assumptions on one or more of the parameters. For example, for ParetoDistribution[k, α, μ]<...

I would like to find a good polynomial fit of the square root.
I tried the following:
...

I have the following set of data:
...

I have plotted some data with a log scale on both axes as shown in the image below. I want to be able to fit this data such that the fit appears as linear on this log-log plot but I haven't been able ...

I think that FindFit package with the method Nminimize yields global minimum if initial values of adjustable parameters are ...

I want to do a non-linear fitting of dataset by the chi squared minimization method in Mathematica.
For an example I have a function f(x) = ax^3 + bx^2 + c
dat={{0,0},{1,6},{2,19},{4.99},{10,1203}}
...

I would like to better understand the process that Mathematica uses to determine the standard error when fitting with NonlinearModelFit. I have been reading this ...

I get the following results when I run the following regression on datass:
...

I have the data which appears like
And I decided to use three Gaussian curves to fit it.
(This code allows me to manipulate all three curves and put in best guesses for peak positions. Using these ...

I need to find the values of x, y that correspond to the minimum value of the function (in this example it is -1.0, the black area).
Code example:
...

I want to fit experimental data by solving 3 coupled differential equations.The ODEs are rate equations modeling the dynamics of hot carriers in semiconductors after excitation. The function use fot ...

I have a system that transit between two different states. Each state output varies linearly with time, given by $m t+c$, where both lines intersect the $x$ axis in the same point. The output of this ...

I have a text file data that I imported and I want to fit it with a given equation. I tried to fit but it did not work and gives
Here is my code:
...

I am wondering how to implement the multi-peak detecting and fitting in Mathematica. Following is an example of fitting the data using three peaks (such that the data ~ peak1 + peak2 + peak3).
The ...

Suppose I have an ODE model and some incomplete time series datadata = {{0,1},{5,6.2},{14,18.4},{28,57.3},{90,105.2},{180,98}}My question, can I still use ...

I am trying to find the parameters of a set of differential equations given experimental data. Before I tackled my set of 12 equations, I tried to solve a simpler and similar 2 equation system but ...

I have a set of datadata = Import["https://pastebin.com/raw/aqUwN2XR", "List"];that gives me a graph that looks as though it has two oscillating sinusoidal ...

I want to run LinearModelFit where the number of parameters is not fixed. For example, the following
...

I use the following code to fit some data given in a previous question of mine:
...

I am trying to fit the following data:data = Import["https://pastebin.com/raw/gHdYLCbA", "Table"]I use the following code:
...

I'm having trouble writing a Nonlinear Model fit where the model is a numerical integral evaluated with NIntegrate. I have read other questions and answers about more or less the same problem, but for ...

I have a piecewise relatively simple function, and I'm looking for three parameters. Here's an MWE:
...

I use a NonlinearFitModel operation for fitting the piecewised data, and then want to use the result of operation as a function. However, it doesn't work. Could anyone please tell me where can be a ...

what I'm trying to do is a weighted fit from points on a list that is formatted like:
...

Given that FindFit seems to just be able to return estimated coefficients and none of the other goodies (standard errors, confidence bands, residuals, etc.), under ...

I am having trouble finding a way to fit my data in Mathematica to a multi-exponential decay, with the critical condition that all contributions to the decay sum to 1.
To start, I can fit my data to ...

Does Mathematica have 2D smoothing spline interpolation built in?
I requires an interpolation method with smooth first derivatives and cubic bivariate splines fulfill this nicely. In python I would ...

I'm kinda new to Mathematica, and it's really giving me a hard time, especially since I'm on a timetable.
I have made a contour and I would like to find a function $u(r)$ for the part that starts ...

Suppose i have some function G[n_,B_,d_] = ....to fit this function i need to collect the data first. However at first i dont understand how to format the data ...

Hi I have a question to find the best average fit curve for a range of data. I have calculated the best fit curve for each sample and plotted them on the same graph.
However, I would need to find ...

I have a table of data given by ...

I have a {x,f} data-set featuring multiple peaks. The peaks evolve with a second variable y. I would like to fit the multiple ...

My question is whether the use of DimensionReduce, for a simple example with Method -> "PrincipalComponentsAnalysis" is the ...

My data gives some function integrated over bins of the argument. I want to fit the function with this data. I determine another function with the bin number as the argument and use ...

to fit my data, I use the following code. Using Manipulate on my fitting function, I can guess roughly the value for my initial fitting parameter which are in the ...

This may seem silly, but I've been crazy for the last hour trying to find a way to automate the linear fit of my data. All I need is the slope.
Say I have some data ...

Say that I have the following data
...

Let's say I have data points (y vs x) << data = https://pastebin.com/FR3xMwk8 >>, and it is shown in here. It is the intensity vs time of two different datasets.
I collect some data sample from ...

I am trying to use the method of moments to fit parameters to a distribution. This involves minimizing a function. This certainly gives real numbers, but FindMinimum gives an error message saying that ...

- probability-or-statistics
- plotting
- mathematical-optimization
- nonlinear
- data
- differential-equations
- distributions
- interpolation
- error
- modeling
- equation-solving
- numerical-integration
- list-manipulation
- functions
- numerics
- parametric-functions
- polynomials
- image-processing
- performance-tuning
- function-construction
- implementation-details
- complex
- time-series
- approximation
- machine-learning

- Shorten trip to Mars
- Nigerian scammer openly say they are from Nigeria - but why?
- Can I use NDA materials to force my employer to pay my salary if I haven't signed NDA agreement?
- When you hit a baseball, does the ball ever travel faster than the bat?
- How to prevent admins to access logs from their own activity?
- Is it unreasonable to expect Any() *not* to throw a null reference exception?
- How do you SUM a column without having its name?
- 1x1 Convolution. How does the math work?
- Any rectangular shape on a calculator numpad when divided by 11 gives an integer. Why?
- Please point out where 'abaft the beam' is on this picture?
- Windows 10 Notepad can't "Find" text
- Perl script running infinitelly - how to debug what happen?
- Is it okay to mention we're citing an article only because a reviewer told us to?
- Fill in the boxes to get the right equation
- Can I publish a paper which 1) proposes an idea and 2) proves that the idea doesn't work?
- Math arrows don't display with Beamer + xelatexmk + libertinus
- Relating a proof to a Haskell program
- What does "go blue" mean here?
- Is there a UX term for a "happy state"?
- Anatomically correct sharknado shark
- Help on Moment Generating Functions
- Are two potential love interests enough?
- Build a Markdown bomb
- What are the biggest pitfalls to avoid with student loans?