我正在尝试对一些数据运行零膨胀负二项式计数模型,这些数据包含按县划分的政治家的竞选访问次数。(对数似然检验表明负二项式是正确的,Vuong 检验表明零膨胀,尽管这可能会因为我的零膨胀模型显然没有收敛的事实而被抛弃。)我在 R 中使用 pscl 包。问题是当我跑步时
Call:
zeroinfl(formula = Sanders_Adjacent_Clinton_Visit ~ Relative_Divisiveness + Obama_General_Percent_12 +
Percent_Over_65 + Percent_F + Percent_White + Percent_HS + Per_Capita_Income +
Poverty_Rate + MRP_Ideology_Mean + Swing_State, data = Unity_Data, dist = "negbin")
Pearson residuals:
Min 1Q Median 3Q Max
-0.96406 -0.24339 -0.11744 -0.03183 16.21356
Count model coefficients (negbin with log link):
Estimate Std. Error z value Pr(>|z|)
(Intercept) -1.216e+01 NA NA NA
Relative_Divisiveness -3.831e-01 NA NA NA
Obama_General_Percent_12 1.904e+00 NA NA NA
Percent_Over_65 -4.848e-02 NA NA NA
Percent_F 1.737e-01 NA NA NA
Percent_White 2.980e+00 NA NA NA
Percent_HS -3.563e-02 NA NA NA
Per_Capita_Income 7.413e-05 NA NA NA
Poverty_Rate -2.273e-02 NA NA NA
MRP_Ideology_Mean -8.316e-01 NA NA NA
Swing_State 1.580e+00 NA NA NA
Log(theta) 9.595e+00 NA NA NA
Zero-inflation model coefficients (binomial with logit link):
Estimate Std. Error z value Pr(>|z|)
(Intercept) -1.024e+02 NA NA NA
Relative_Divisiveness -3.265e+00 NA NA NA
Obama_General_Percent_12 -2.300e+01 NA NA NA
Percent_Over_65 -7.768e-02 NA NA NA
Percent_F 2.873e+00 NA NA NA
Percent_White 5.156e+00 NA NA NA
Percent_HS -5.097e-01 NA NA NA
Per_Capita_Income 2.831e-04 NA NA NA
Poverty_Rate 1.391e-02 NA NA NA
MRP_Ideology_Mean -2.569e+00 NA NA NA
Swing_State 5.075e-01 NA NA NA
Theta = 14696.9932
Number of iterations in BFGS optimization: 94
Log-likelihood: -596.5 on 23 Df
显然,所有这些 NA 对我的帮助都不大。任何建议将不胜感激!我是 R、StackOverflow 和 Statistics 的新手,但我正在努力学习。我正在尝试提供最小可重现示例所需的一切,但我看不到任何地方可以分享我的实际数据......所以如果你需要这些东西来回答这个问题,请告诉我我可以把它放在哪里!