Thank you soo much, but it shown like this:
install.packages("Rcpp")
Installing package into ‘C:/Users/Lenovo/Documents/R/win-library/4.0’
(as ‘lib’ is unspecified)
so, i've tried to use
install.packages("Rcpp", lib="/Users/Lenovo/Documents/R/win-library/4.0")
i dno't know am i wrong about the code, but it just shows the exactly the same in the output:
install.packages("Rcpp", lib="/Users/Lenovo/Documents/R/win-library/4.0")
thanks for your time