在“表格"包中:如何获取变量子集的列百分比? [英] In the "Tables"-package: How to get column percentages of a subset of a variable?

问题描述

在名为"Percent"的列下面的表中，显示了总列百分比.如何获得它以显示"vs"的每个级别中"am"的每个级别的列百分比?

In the table below the column named "Percent" shows the total column percent. How do I get it to show the column percent of each level of "am" within each level of "vs"?

这就是我所拥有的:

这就是我想要的:

下面的针织大块

<<echo=FALSE,results='asis'>>=
# 
# library(tables)
# library(Hmisc)
# library(Formula)

## This gives me column percentages for the total table.
latex(  tabular(  Factor(vs)*Factor(am)  ~  gear*Percent("col"),    data=mtcars )     )

## I am trying to get column percentages for each level of "vs"

@

推荐答案

对于denom选项，您可以使用Equal()伪函数来计算因子对分母的水平.

You can use the Equal() pseudofunction for the denom option to make levels of factor vs the denominator.

tabular( Factor(vs)*Factor(am)  ~  gear*Percent(denom = Equal(vs)),    data=mtcars) 

       gear   
vs am Percent
 0  0  66.67  
    1  33.33  
 1  0  50.00  
    1  50.00  

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