我正在尝试在R-Studio中安装'yaml'和'stringi'软件包,它不断给我这些错误:
> install.packages("stringi")
Package which is only available in source form, and may need compilation of C/C++/Fortran: ‘stringi’
These will not be installed
要么
> install.packages('yaml')
Package which is only available in source form, and may need compilation of C/C++/Fortran: ‘yaml’
These will not be installed
如何正确安装这些？