Problem when installing quantmod package
Hello? I tried to install "quantmod" package. But I got the following error:
install.packages("quantmod")Warning in install.packages :? unable to access index for repository https://cran.rstudio.com/src/contrib:? cannot open URL 'https://cran.rstudio.com/src/contrib/PACKAGES'Installing package into ?C:/Users/win7120/Documents/R/win-library/3.2?(as ?lib? is unspecified)Warning in install.packages :? unable to access index for repository https://cran.rstudio.com/src/contrib:? cannot open URL 'https://cran.rstudio.com/src/contrib/PACKAGES'Warning in install.packages :? package ?quantmod? is not available (for R version 3.5.1)Warning in install.packages :? unable to access index for repository https://cran.rstudio.com/bin/windows/contrib/3.5:? cannot open URL 'https://cran.rstudio.com/bin/windows/contrib/3.5/PACKAGES'
What is the problem? Best regards Baki ?nal