저장소

#연습문제 ta=read.csv('train.csv')head(ta)m=subset(ta,Sex=='male')head(m)f=subset(ta,Sex=='female')mm=mean(m[,2],na.rm=T)mf=mean(f[,2],na.rm=T) m0=mean(m[m$Age=10&m$Age=20&m$Age