# titanic3.csv  
#'data.frame': 1309 obs. of 14 variables:
#1.pclass : 1, 2, 3   1, 2, 3 
#2.survived :  . survived(=1), dead(=0)
#3.name : ̸()
#4.sex : . female(), male()
#5.age : 
#6.sibsp : Բ ž  Ǵ  
#7.parch : Բ ž θ Ǵ ڳ 
#8.ticket : Ƽ ȣ()
#9.fare : Ƽ 
#10.cabin :  ȣ()
#11.embarked : ž . C(Cherbourg), Q(Queenstown), S(Southampton)
#12.boat     : ()Factor w/ 28 levels "","1","10","11",..: 13 4 1 1 1 14 3 1 28 1 ...
#13.body     : ()int  NA NA NA 135 NA NA NA NA NA 22 ...
#14.home.dest: ()