r - 从flextable中的字符串动态设置colnames

Question

flextable 帮助详细信息描述了如何添加新 header ，即根据每个新 header 名称手动键入每个现有 header 名称，如下所示:

library(flextable)
ft_1 <- regulartable(head(iris))
ft_1 <- set_header_labels(ft_1, Sepal.Length = "SL",
                          Sepal.Width = "SW", Petal.Length = "PL",
                          Petal.Width = "PW"
)
ft_1

如何从字符串中添加所有新的 header 名称，例如

(names2<-c('SL','SW','PL','PW','SPECIES'))
[1] "SL"      "SW"      "PL"      "PW"      "SPECIES"

？

到目前为止，我已经管理了一个非常hacky的解决方案:

names(names2)<-names(ft_1$header$dataset[1,])

ft_1$header$dataset[1,]<-names2

Answer 1

set_header_labels 用于对 header 值进行细微修改。如果您想将 df 列名称映射到一组一个或多个新标题行，则可以使用 set_header_df:https://davidgohel.github.io/flextable/articles/layout.html#define-headers-with-a-reference-table

library(flextable)

names1 <- c("Sepal.Length", "Sepal.Width", "Petal.Length", "Petal.Width", "Species")
names2 <- c('SL','SW','PL','PW','SPECIES')

ft <- flextable( head( iris ) )
ft <- set_header_df(x = ft, mapping = data.frame(keys = names1, values = names2, stringsAsFactors = FALSE),
              key = "keys" )

# the following call is needed as header formats have been 
# replaced by vanilla formats when set_header_df() has been called
ft <- theme_booktabs(ft) 
ft