技术：分类数据可视化

They can be easier to understand than contingency tables, especially when there are more than two variables. cran

很好的替代了列联表

library(vtree)

## Error in `library()`:
## ! there is no package called 'vtree'

FakeDataFig <- vtree(FakeData, "Severity Sex", horiz = FALSE)

## Error in `vtree()`:
## ! could not find function "vtree"

# grVizToPNG(FakeDataFig)
FakeDataFig

## Error:
## ! object 'FakeDataFig' not found

# Argument must be of class htmlwidget.