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Questions tagged [newtons-method]

In numerical analysis, Newton's method (also known as the Newton–Raphson method) is a method for finding successively better approximations to the roots (or zeroes) of a real-valued function.

In numerical analysis, Newton's method (also known as the Newton–Raphson method) is a method for finding successively better approximations to the roots (or zeroes) of a real-valued function.

Formula:

enter image description here

In this formula xn + 1 is the next closest approximation after xn, f(xn) is the function at xn and f'(xn) is the derivative of the function at xn.

First approximation x0 has to be in interval (a,b) where exact solution x* is situated.

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Problems with Newton's Method for finding coefficient and Hessian

I am trying to write a function that uses Newton's method (coefficients+(inverse hessian)*gradient) to iteratively find the coefficients for a loglinear model. I am using the following code: ##reading in the data dat<-read.csv('hw8.csv') …
user188077
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Numerical Solve in Java

I'm looking to incorporate some sort of implementation of numerical solving for linear algebraic solutions in Java, like this: 5x + 4 = 2x + 3 Ideally, I would prefer to parse as little as possible, and avoid using traditional "human" methods of…
bgroenks
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How to add a Sequence of Estimates to my Newton Raphson Code for matlab?

My code works BUT I need to add 2 more things: output- a vector containing the sequence of estimates including the initial guess x0, input- max iterations function [ R, E ] = myNewton( f,df,x0,tol ) i = 1; while abs(f(x0)) >= tol …
Ajay Kejriwal
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Newton's method returns NaN

I wrote simple recursive version of Newton's method: #include using namespace std; double DeriveAt(double (*f)(double), double x){ return( (f(x+0.001)-f(x-0.001))/0.002 ); }; double FindRoot(double (*f)(double), double x0){ …
einbandi
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Numerical recipes: How to pass function as argument of function newt in c++

My question is related to numerical recipes. I have a global function which computes the vector of functions to be minimized VecDoub vecfunc(VecDoub_I x) { // code is here } In a class function run, I tried to call the Numerical Recipes function…
Michael
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Approximating two different curves in R

I have two different density plots in R- one of them is the observed data (x1), and the other is randomly generated data from a Poisson distribution with the observed mean (x2). I would like to approximate the curves, i.e. make the expected curve…
clattenburg cake
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MatLab - Newton's method algorithm

I have written the following algorithm in order to evaluate a function in MatLab using Newton's method (we set r = -7 in my solution): function newton(r); syms x; y = exp(x) - 1.5 - atan(x); yprime = diff(y,x); f = matlabFunction(y); fprime =…
Kristian
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Newtonsoft.Json.JsonSerializationException - Cannot deserialize the current JSON object

Lot of similar questions but still not able to make it. Here is my code in vb.net and this is the json response. enter image description here I know this is because of [] but i'm using list don't know still getting the same error.
abdullah
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Is there any out of the box newton like solver that allows bounds (and a supplied jacobian and hessian)

Is there any out of the box newton like solver that allows bounds on the input parameters (and a supplied expression for the jacobian and hessian). I am basically exactly looking for "trust-constr" in SciPy, except that one does not seem to work at…
Kvothe
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Edit Newtons Method code to include termination criteria

function [ sol, flag ] = newtonx(sx, relerr, maxit, func) % [SOL,FLAG]=NEWTONX(SX, RELERR, MAXIT, FUNC) % % Solves f(x)=0 using Newton’s method % % Input: scalar sx - starting point of the iteration % small positive scalar relerr - desired…
sam
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Finding roots using the newton raphson method

I'm trying to find the fourth root of a number using the newton raphson method, and I get this weird error in my code. Can anyone please help me fix it? Thanks while abs(g**4-k)>=epsilon: builtins.OverflowError: (34, 'Result too large') def…
bot123
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I can't see the output of my Matlab code for Newton's Method, what am I missing?

So I have the following matlab code where I am attempting to calculate Newton's Method to solve a non-linear equation (in particular, identify the square root). I am unable to see the output of my two fprintf() statements, so I think I fundamentally…
Eoin Dowling
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Java finding Zero Points with Newton Algorithm endless loop

I'm havinga Problem with a method, which takes a Polynom like f(x)=x²+1 and calculates possible zero points with the newton algorithm. I have given requirements for specific variables so even if the naming is not good or a variable is not needed I…
KilledByCheese
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Buoyancy vs water flow pressure

I'm trying to design a kind of water valve with inexpensive materials as a first prototype. The water flow from the PVC pipe (1) reach the body of the valve and pass through an aluminum grid (3) to the water tank. When the water level goes up pushes…
Joaquin Osses
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Small python program involving newton method

I'm trying to write a small program in python that involves(among other things) Newton method, but i'm encountering several problems, that are probably pretty basic, but since I'm new at programming, i cant overcome.. First i defined the function…
Hilberto Silva
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