如何解决stargazer报错：Incomplete expression？

错误原因 #

代码存在引号不匹配的语法错误：在选取数据框列的向量中，CAPITALCITY的左侧用了单引号'，右侧却用了双引号"，混合使用引号导致R无法解析完整字符串，进而判定整个stargazer表达式未完成，触发该报错。

解决方法 #

将不匹配的引号修正为统一格式（双引号或单引号均可），以下是修正后的完整代码：

stargazer(df_analysis[c("YRSCHOOL", "SCHOOL", "CHBORN_MOM", "AGE", "CAPITALCITY", "NOINCOME_MOM", "NOINCOME_DAD", "MALE")], 
          type = "text", 
          summary.stat = c("n","mean","sd", "min", "max"), 
          covariate.labels = c("Years Of Schooling", "School Attendance", "Number of Children", "Age", "Capital City", "Mother Has No income", "Father Has No Income", "Male"), 
          digits = 2, 
          title="Summary Statistics", 
          notes="Note: Data are 1% sample of individual aged 5-21 from 1980 Thailand census. Source: IPUMS International")

内容的提问来源于stack exchange，提问作者Minmint