Re: Parameter Estimation for 3-parameter Weibull Distribution
- To: mathgroup at smc.vnet.net
- Subject: [mg53660] Re: Parameter Estimation for 3-parameter Weibull Distribution
- From: yanzj at dl.cn (Yan ZJ)
- Date: Fri, 21 Jan 2005 06:37:36 -0500 (EST)
- References: <6ghkla$lq3@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Dear Sir:
The program can not solve the accurate result at the step:
pMLE = FindRoot[eqnLLF,{a,a/.pEst},{b,b/.pEst},{m,m/.pEst}] /.
x_Complex -> Re[x]
or at the step
pEst = FindRoot[eqnEst, {a,minData}, {b, 1.}, {m, 1.}]
It shows me such information:
"Newton's method failed to converge to the prescribed accuracy after
(15) iterations."
How to overcome this problem??
Thank you to reply!!
Yan ZJ