R编程中如果标签名称以“G”开头，如何去掉列标签

编程问答 2022-05-29

问题描述

如果标签名称以“G”开头，如何去除列标签

代码：

library(pdftools)
library(data.table)
library(tabulizer)
pdf_file <- "new.pdf"

out2 <- extract_tables(pdf_file,pages =c(89),output = "data.frame")
out2<-as.data.table(out2)
colnames(out2)

实际输出：

"Group.1" "Day.7"   "Day.8" "Day.9"
"Group.2" "Day.10" "Day.11","Day.12"

预期输出：

"Day.7"   "Day.8" "Day.9"
"Day.10" "Day.11","Day.12"

另外请向我建议任何其他从 PDF 中提取数据表的 R 包（pdftools 和 tabulizer 除外）

解决方法

这将删除以 "G" 开头的列：

result <- out2[,!startsWith(names(out2),"G")]
,

您可以使用dplyr::select：

library(dplyr)

dplyr::select(out2,-starts_with("G"))
dataframepdftoolsrrtabulizer