I use lmer to fit a mixed effect model.It give some warnings.what does this warnings mean? and what should I do?
> (fm2.mlm <- lmer(qd ~ edu + jiankang + peixun +hunyin + cadcj + age + age2 + > sex + dangyuan + Comp.1 + Comp.2+trust.cz1 +(trust.cz1|commid), data = > individual,na.action = "na.exclude",family="quasibinomial")) Generalized linear mixed model fit using PQL Formula: qd ~ edu + jiankang + peixun + hunyin + cadcj + age + age2 + sex + dangyuan + Comp.1 + Comp.2 + trust.cz1 + (trust.cz1 | commid) Data: individual Family: quasibinomial(logit link) AIC BIC logLik deviance 736.7059 821.8267 -349.3529 698.7059 Random effects: Groups Name Variance Std.Dev. Corr commid (Intercept) 1.56413 1.25065 trust.cz1 0.17922 0.42334 1.000 Residual 0.89728 0.94725 # of obs: 652, groups: commid, 39 Fixed effects: Estimate Std. Error DF t value Pr(>|t|) (Intercept) -1.6115e-01 6.7997e-01 637 -0.2370 0.81274 edu -5.2585e-02 4.1048e-02 637 -1.2810 0.20064 jiankang -9.8243e-01 4.4645e-01 637 -2.2005 0.02813 * peixun -4.6307e-01 2.6397e-01 637 -1.7542 0.07988 . hunyin -1.2255e-02 2.8151e-01 637 -0.0435 0.96529 hunyin -2.7726e-01 1.3846e+00 637 -0.2002 0.84136 hunyin -2.9759e-01 8.7180e-01 637 -0.3414 0.73295 cadcj 2.2366e-01 7.6467e-01 637 0.2925 0.77000 age 9.3626e-02 4.0390e-02 637 2.3180 0.02076 * age2 -1.3095e-03 5.5104e-04 637 -2.3763 0.01778 * sex 3.9188e-01 1.9759e-01 637 1.9833 0.04776 * dangyuan -5.2558e-01 5.9091e-01 637 -0.8894 0.37410 Comp.1 5.2463e-02 1.0309e-01 637 0.5089 0.61100 Comp.2 -1.5048e-01 1.1435e-01 637 -1.3160 0.18863 trust.cz1 -8.0709e-01 4.4632e-01 637 -1.8083 0.07103 . --- Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1 There were 11 warnings (use warnings() to see them) > warnings() Warning messages: 1: optim or nlminb returned message false convergence (8) in: LMEopt(x = mer, value = cv) 2: optim or nlminb returned message false convergence (8) in: LMEopt(x = mer, value = cv) 3: optim or nlminb returned message false convergence (8) in: LMEopt(x = mer, value = cv) 4: optim or nlminb returned message false convergence (8) in: LMEopt(x = mer, value = cv) 5: optim or nlminb returned message false convergence (8) in: LMEopt(x = mer, value = cv) 6: optim or nlminb returned message false convergence (8) in: LMEopt(x = mer, value = cv) 7: optim or nlminb returned message false convergence (8) in: LMEopt(x = mer, value = cv) 8: optim or nlminb returned message false convergence (8) in: LMEopt(x = mer, value = cv) 9: optim or nlminb returned message singular convergence (7) in: LMEopt(x = mer, value = cv) 10: optim or nlminb returned message singular convergence (7) in: LMEopt(x = mer, value = cv) 11: optim or nlminb returned message singular convergence (7) in: LMEopt(x = mer, value = cv) > version _ platform i386-pc-mingw32 arch i386 os mingw32 system i386, mingw32 status major 2 minor 2.0 year 2005 month 10 day 06 svn rev 35749 language R 2005-12-14 ------ Deparment of Sociology Fudan University My new mail addres is [EMAIL PROTECTED] Blog:http://sociology.yculblog.com
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