2013-10-19から1日間の記事一覧
http://stackoverflow.com/questions/6651722/search-through-a-table-in-r X[X[,1]=="C",2] X["C",2]
http://stackoverflow.com/questions/6651722/search-through-a-table-in-r X[X[,1]=="C",2] X["C",2]
