我已经将此软件包下载为zip文件.
是否可以使用此zip或unzip版本从R控制台安装到特定路径？
install.packages("C:/Users/Desktop/rvest-master.zip', lib='C:/R/R-3.2.1',repos = NULL)
我键入上一个命令但不起作用
> setwd("C:/Users/Desktop/")
> unzip("rvest-master.zip")
> file.rename("rvest-master", "rvest")
[1] TRUE
> shell("R CMD build rvest")
Warning messages:
1: running command ' /c R CMD build rvest' had status 127
2: In shell("R CMD build rvest") :
'R CMD build rvest' execution failed with error code 127
> install.packages("rvest_0.2.0.9000.tar.gz", repos = NULL)
Installing package into ‘C:/Users/Documents/R/win-library/3.2’
(as ‘lib’ is unspecified)
Warning: invalid package 'rvest_0.2.0.9000.tar.gz'
Error: ERROR: no packages specified
Warning messages:
1: running …我使用Rstudio并尝试通过命令控制台添加新包.
由于这个原因,它无法安装它
install.packages("devtools"); devtools::install_github("hadley/rvest")
Warning in install.packages :
'lib = "C:/Program Files/R/R-3.2.1/library"' is not writable
Warning in install.packages :
cannot create dir 'C:\Users\myuser', reason 'Permission denied'
Error in install.packages : unable to create ‘C:/Users/myuser/Documents/R/win-library/3.2’
Error in loadNamespace(name) : there is no package called ‘devtools’
如何使此文件可写？
是否可以从URL获取特定值并将其保存到csv？
我有一个txt文件,其中一列包含这样的网址
我试图收集价值,如奖励的价值和支持者的数量.最终文件应该有两列,如下所示
10,15,30,50 17,9,9