I'm new in R programming. Want a run little script for TTR package, but getting version error
Here is my code part
options(repos=(CRAN="https://CRAN.R-project.org/package=TTR"))
install.packages("https://CRAN.R-project.org/package=TTR")
and here is error I get
Warning: unable to access index for repository https://CRAN.R-project.org/package=TTR/src/contrib:
cannot open URL 'https://CRAN.R-project.org/package=TTR/src/contrib/PACKAGES'
Warning message: package 'https://CRAN.R-project.org/package=TTR' is not available (for R version 3.4.4)
Error in library(TTR) : there is no package called 'TTR'
but when I run TTR library from https://rdrr.io/snippets/ , it works well, and R version in the link is 3.4.4
How can I solve this problem?
EDIT: I see this question How should I deal with "package 'xxx' is not available (for R version x.y.z)" warning?, but can not find my solution