Error Messages when I try to load ggplot2 after installatio : I get an error message when i try to load ggplot2 even after download.  
Even when i tried:  

    install.packages('ggplot2',dependencies = T)   
I get the following error message:  
No package called 'Rcpp'  
Error:package or namespace load failed for ggplot2.  
Then i try:  

    install.packages('Rcpp')  
i get Rcpp successfully downloaded, but when i try to load ggplot2 i get thesame error message:  
No package called 'Rcpp'  
Error:package or namespace load failed for ggplot2.  
I was using R 3.2.1 but updated to R 3.2.3  
I would appreciate any meaningful help.