我正在编写R包并使用R / sysdata.rda。运行devtools:document()后，
Updating InjurySeverityScore documentation
Loading InjurySeverityScore
Error in readChar(con, 5L, useBytes = TRUE) : cannot open the connection
In addition: Warning message:
In readChar(con, 5L, useBytes = TRUE) :
cannot open compressed file 'sysdata.rda', probable reason 'No such file or directory'
想知道是否有人可以提供一些提示？