install.packages('lsa',dependencies=T)

library(lsa)

m1<-c(1,2,1,0)

m2<-c(1,1,1,0)

cosine(m1,m2)

problem:

 

4 accepted

Dah, not long after posting I found the answer here: Although I already had Sun Java installed, the key was to run update-java-alternatives to actually switch to Sun Java first before running javareconf: sudo update-java-alternatives -s java-6-sunsudo R CMD javareconf | | 要解决这个问题，还得参考如下的链接

http://www.cnblogs.com/lexus/archive/2011/12/01/2271060.html