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R 语言经典实例(原书第 2 版)
book

R 语言经典实例(原书第 2 版)

by J.D. Long, Paul Teetor
June 2020
Beginner to intermediate
522 pages
9h 6m
Chinese
China Machine Press
Content preview from R 语言经典实例(原书第 2 版)
输入与输出
109
#> [1] "Year"
#>
#>
#> $Domestic__
#> $Domestic__$label
#> [1] "Domestic $"
#>
#> $Domestic__$format.sas
#> [1] "F"
#>
#>
#> $Worldwide__
#> $Worldwide__$label
#> [1] "Worldwide $"
#>
#> $Worldwide__$format.sas
#> [1] "F"
#>
#>
#> $Director
#> $Director$label
#> [1] "Director"
4.13.4 另请参阅
在大文件方面,sas7bdat 包要比 haven 文件慢得多,但它对文件属性的支持更为精
细。如果 SAS 元数据对你很重要,那么你可以参考 sas7bdat::read.sas7bdat
4.14 读取 HTML 表格数据
4.14.1 问题
你希望读取网络中 HTML 网页的表格数据。
4.14.2 解决方案
使用 rvest 包中的 read_html html_table 函数。要阅读页面上的所有表格,请
执行以下操作:
library(rvest)
library(tidyverse)
all_tables <-
read_html("
url
") %>%
html_table(fill = TRUE, header = TRUE)
注意,运行 install.packages('tidyverse') 时会安装 rvest,但它不是核心 ...
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Publisher Resources

ISBN: 9787111656814