I Any tools that can help find the equation for a set of data?

  • I
  • Thread starter Thread starter Haorong Wu
  • Start date Start date
  • Tags Tags
    Data Set Tools
Haorong Wu
Messages
417
Reaction score
90
TL;DR Summary
Are there any tools that can help me find the equation for a given set of data?
Suppose that I can generate the result of a function ## c_{x,y}=f(x,y)## by a method not involving the function ##f##. I need to find ##f(x,y)## now. The expression of ##f(x,y)## is expected to contain basic algebra operation (+-*/), power, absolute value and factorial.

I have tried to find it manually but failed (##f(x,y)## exists, I am sure). So are there any tools that can help?

Thanks.
 
Mathematics news on Phys.org
'regression analysis' is the term to search for. There are a plethora of methods to help you here.
 
Arjan82 said:
'regression analysis' is the term to search for. There are a plethora of methods to help you here.
Thanks, Arjan82. I have heard of it. But according to my memory, it may be mainly used to find linear or nonlinear relations or find coefficients when the basic form of the function is given. Could this be used when the function contains absolute value and factorial? I am still reading Wikipedia.
 

Thread 'What Exactly is Dirac’s Delta Function? - Insight'

Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. In Dirac’s Principles of Quantum Mechanics published in 1930 he introduced a “convenient notation” he referred to as a “delta function” which he treated as a continuum analog to the discrete Kronecker delta. The Kronecker delta is simply the indexed components of the identity operator in matrix algebra Source: https://www.physicsforums.com/insights/what-exactly-is-diracs-delta-function/ by...
View full post »

Thread 'Fermat's Last Theorem'

Fermat's Last Theorem has long been one of the most famous mathematical problems, and is now one of the most famous theorems. It simply states that the equation $$ a^n+b^n=c^n $$ has no solutions with positive integers if ##n>2.## It was named after Pierre de Fermat (1607-1665). The problem itself stems from the book Arithmetica by Diophantus of Alexandria. It gained popularity because Fermat noted in his copy "Cubum autem in duos cubos, aut quadratoquadratum in duos quadratoquadratos, et...
View full post »

Thread 'Useless continued fraction for 1'

I'm interested to know whether the equation $$1 = 2 - \frac{1}{2 - \frac{1}{2 - \cdots}}$$ is true or not. It can be shown easily that if the continued fraction converges, it cannot converge to anything else than 1. It seems that if the continued fraction converges, the convergence is very slow. The apparent slowness of the convergence makes it difficult to estimate the presence of true convergence numerically. At the moment I don't know whether this converges or not.
View full post »

Similar threads

I Finding a Rational Function with data (Pade approximation)
Replies
4
Views
2K
I Finding the Largest (or smallest) Value of a Function - given some constant symmetric errors
Replies
3
Views
1K
I Best way to fit three functions
Replies
2
Views
1K
I Partial Differential Equation solved using Products
Replies
2
Views
2K
I Statistics proof: y = k x holds for a data set
Replies
4
Views
2K
I Finding multinomial coefficients by evaluation?
Replies
13
Views
2K
B Creating Equation Based on Data Set of x,y Values
Replies
4
Views
5K
I Time evolution of the electromagnetic wavefunction on a lattice
Replies
9
Views
2K
I Product of functions to express any function
Replies
5
Views
2K
I Regression Prediction with Time Series Data
Replies
1
Views
1K

Hot Threads

Recent Insights

Back
Top