The time i have tried to install the package named ‘PODBC‘ and it worked.
But now i meet a problem with package named ‘pmg‘ again.
> install.packages(‘pmg‘,dep=T)
package ‘pmg’ is available as a source package but not as a binary
I choose ‘package & data‘ again and download ‘pmg‘.
R for installing package 'omg'
原文：http://www.cnblogs.com/monne/p/4281379.html