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Dear Mr. or Ms.,   I used the R-software to run the zero-inflatoin negative binomial model (zeroinfl()) .   Firstly, I introduced one dummy variable to the model as an independent variable, and I got the estimators of parameters. But the results are not satisfied to me. So I introduced three dummy variables to the model. but I could not get the results. And the error message is

Dear Mr. or Ms.,   I used the R-software to run the zero-inflatoin negative binomial model, but I could not get the results. And the error message is "solve.default(as.matrix(fit$gaussian)) ". In the model, I introduced 3 dummy variables. I do not know the reasons fully.   I will be very appreciate if you can help me. Thank you.   Best regards,   Sincerely, Xiongqing Zhang

Hello all, I am Xiongqing Zhang, come from Beijing of China. I know you from the web site: http://finzi.psych.upenn.edu/Rhelp08/2008-February/154627.html. I am not very clear about the R-project software. But I want to estimate the parameters and errors of zero-inflation poisson model. Can?you help me? Data is in the attachement. Thank you. I will be very appreciated if you can help me. Best

Dear Mr. or Ms.,   I would like to use the R-software to run the zero inflated mixed model and hurdle mixed model. But I do not know how to do? Would you please tell me the code and data format?   I will be very appreciated if you can help me. Thank you very much.   Best regards,   Sincerely, Xiongqing Zhang [[alternative HTML version deleted]]

Hi, I try to use the visual studio 2008(VC.net) to call R code, but there is en error:  Exception from HRESULT: 0x80040013 How can I fix the problem? Thanks.   My PC systern is XP, R version is "R-2.14.1" and "R_Scilab_DCOM3.0-1B5.exe".   best regards, Xiongqing [[alternative HTML version deleted]]