Newton-Raphson

Newton-Raphson method for all real roots of the polynomial.

Description

This M-file calculates all the real roots of the given polynomial. It calls syn_division, a synthetic division function, and derivate, differentiation function.

• MATLAB release: MATLAB 5.3 (R11)

[Tannistha]

nice script

[Halit]

 

[jemo]

 

[Emre]

gives error
??? Input argument "coeff_function" is undefined.

Error in ==> syn_division at 6
order_fun=size((coeff_function),2);

[bulmbju hkb]

dz"zrf"r

[mohd izzat mustaffa]

i need help to find root for certain function f(x)=0.5*x^3-4*x^2+6*x-2 with initial guess of 4.2..can help me?
thanks...using newton raphson method

[Chiara]

I need a help to find the solution for an expression with 3 parameters.

[Juan Camilo Medina]

There exist a build in function to compute the roots of polynomial in Matlab already (type help roots). What if you want to do another nonlinear function and not a polynomial?

[Harsha Vardhan]

 

[hefei anhui]

thank you very much

[Kolade Olanipekun]

Please I need a Matlab code to iterate this function urgently
Det (I - H*Bdiag(f+g)B')= 0 ; where I=Identity matrix, H=3 by 3 matrix,B=3 by 2 matrix,B'=B transpose while (f+g) is 2by 2 matrix.

Thanks.

[Yong Wang]

Cooooool~~~

[Andrew staines]

excellent software for the 1 parameter case, I needed it for 2... any ideas?

[Darren Rowland]

This functionality is already implemented in Matlab, in the function roots. This is a poor attempt to achieve the same result

[Sushma Lanke]

do you by any chance have matlab codes to solve the following system of equations using newton raphson method, etc :

f(x) = 63X^5 - 70 X^3+ 15x
please kindly forward us the codes if it is possible.

[Sushma Lanke]

 

[ek cha]

 

[jose luis]

 

[raj roshan dhruw]

good

[raj roshan dhruw]

good

[derya sahin]

 

[yuan feng]

a good way to solve equations

[raj roshan dhruw]

 

[ivan ivic]

 

[svetlana sejas]

gracias

[Izzie Lee]

 

[Jing Gao]

 

[nick whirsman]

 

[mlago fateh]

héros de berber

[Andoni Lizaso]

 

[EDWIN MORENO]

i need what is the method,

[Yi Cao]

find polynomial roots through polynomial evaluation is not numerically stable. For example, consider the polynomial which has roots at 1,2,3,4,5,6,7,8,9,10,11,12. The coefficients of this polynomial can be obtained by c=poly(1:12); then test this code:

newton(poly(1:12),1,1e-6,100)

It can only detect roots 1:9, not 10, 11, and 12.

MATLAB already has function, roots to find all roots of a polynomial. It calculates the eigenvalues of the companion matrix of the polynomial, hence is stable. Therefore, there is no any reason one should use this code.

[tien quach]

 

[Sohail iqbal]

Works perfectly!

[enes yigitbas]

good work. thanks a lot...

[Jimmy Banker]

it always say error

Error in ==> syn_division at 6
order_fun=size((coeff_function),2);

[Mihon Honda]

Very interesting!! Your algorithm is clean and worthy!
Is there a reason why do you create a m file derivate? Can't u just use the polyder function? Or are there limitations?

[shiran jaya]

hi every one .. plz help me to develop my matlab knowledge. also i am a beginner for
matlab and it is pleaser to me joining with you.
tanks .....

[john kan]

 

[Sanjay Malakar]

 

[ooi heng]

can u let me know how to use, when i simulate got error, URGENT!

[adrian pramanta]

 

[ddt tio]

goood code

[Qu Suhan]

very useful!

[eeee weew]

ewthays good

[chiali lotfi]

its butiful

[thamer hamad]

thank you

[Eric Bowman]

very helpful, thank you

[prithvi gopinath]

great work.. thanks a lot. i need an example of m-r method in matlab to solve power system analysis problems.
thank you

[Haomin Zhang]

Thank you for your work

[jeua jea]

good

[Hans Andrew]

Very Useful in Power Flow Analysis, i hope i can have it. Thank you very much.

[youcef brik]

thanks

[Ricky Wong]

To:levent simsek example:
newton ( [1 -6 8], 1, 0.01, 100)

ans =

1.99999995353885 4.00000004646115

[tzompantzi alejandro]

 

[Rosario Ortiz Munuera]

I am studing mathematics and I would like to get the Newton-Raphson algorithm written in matlab, if it's possible.

[levent simsek]

I need examples!!
could you give any inputs as an example??
thenk you!

[ahmed mostefa]

pogramme de gausse sedeil de ecoullement de puissance de reseaux electrique

[augusto rodriguez]

I need to learn more about matlab programing

[JULIAN YEPES]

IT`S A GOOD TOOL IN THE ENGINEERING.

[mh oooo]

that's good

[muhammed kýlýnç]

 

[ali dönmez]

very good

[koko dzambo]

 

[liapunov popov]

 

[liliana jaimes]

 

[sheikh tamjid mashrafi]

 

[Daniel C]

 

[Cosme Rafael Marcano-Gamero]

It's very good

[samir cosickic]

 

[abooboo kong]

cool very cool

[AIT MOUDID Lahcen]

It's good "coeff_function!"

[Henry Osorio]

Very good

[senad hodzic]

it's good

[said morjani]

power system analysis
newton raphson method
programmation matlab

[said morjani]

power system analysis

[Antony Chatu]

do you by any chance have matlab codes to solve the following system of equations using newton raphson method, etc :

f(x,y) = x^2 - cosy = 0
g(x,y) = sinx + x^2 + y^3 = 0

please kindly forward us the codes if it is possible.

[belkharroubi mohamed]

power system analysis
newton raphson method
programmation matlab

[haidas med]

help me for newton raphson method in modelind the Insulat Gate bipolar Transistor
IGBT.

[k.l narayana]

kindly send me the newton raphson method for solving two variables as my project involves solving for two variables using newton-raphson method.