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From |
tiago.pereira@incor.usp.br |

To |
statalist@hsphsun2.harvard.edu |

Subject |
st: How to obtain the solution of a quintic polynomial equation using Stata |

Date |
Sat, 17 Nov 2007 15:11:35 -0200 (BRT) |

Dear Statalisters I have the following quintic polynomial equation dy=a0+a1*x+a2*x^2+a3*x^3+a4*x^4+a5*x^5 the objective is to estimate x. where a0= x12*mu_s*(1+mu_s)+2*x22*mu_s^2 a1=-2*(n*mu_s*(1+mu_s)+x12*mu_s) a2=6*n*mu_s+2*x11+x12 a3=-2*(2*n*mu_s+n+2*x11+x12) a4=4*n+2*x11+x12 a5=-2*n Is there a straighforward way to solve it using Stata? Or, since I know that x is constrained between 0 and 1, to use brute force to find out the solution? If so, how many decimals places used in a loop would you suggest? Tiago * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: How to obtain the solution of a quintic polynomial equation using Stata***From:*"Austin Nichols" <austinnichols@gmail.com>

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