使用调查包中的调查权重遍历列和打印表

Question

我试图遍历数据集的列并创建比例表。问卷调查包在变量之前需要加一个〜，以使其难以遍历各列。

数据和设计：

library(survey)
dat <- data.frame(id=c(1,2,3), weight=c(0,2,0.1), var1=c(2,3,5), var2=c(2,6,7))
design <- svydesign(id=~1, weights=~weight, data=dat)

尝试：

cols <- c("var1", "var2") # columns to loop through
for(i in seq_along(cols)) {
prop.table(svytable(~i, design))
}

我收到以下错误消息：

Error in model.frame.default(formula = weights ~ i, data = model.frame(design)) : variable lengths differ (found for 'i')

谢谢

Answer 1

从上文Ben的注释中确认使用bquote作为表达式的部分替换，您可以按以下方式修改for loop：

cols <- c("var1", "var2") # columns to loop through
for(i in  seq_along(cols)){
  print(prop.table(svytable(bquote(~.(as.name(cols[i]))), design)))
} 
# var1
#          2          3          5 
# 0.00000000 0.95238095 0.04761905 
# var2
#          2          6          7 
# 0.00000000 0.95238095 0.04761905 

数据

library(survey)
dat <- data.frame(id=c(1,2,3), weight=c(0,2,0.1), var1=c(2,3,5), var2=c(2,6,7))
design <- svydesign(id=~1, weights=~weight, data=dat)