a=read.csv("D:/回归分析/案例数据/第1章.csv",header=T)
names(a)=c("Y","X1","X2","X3")
a[c(1:5),]
N=sapply(a,length)
MU=sapply(a,mean)
SD=sapply(a,sd)
MIN=sapply(a,min)
MED=sapply(a,median)
MAX=sapply(a,max)
result=cbind(N,MU,SD,MIN,MED,MAX)
2022-05-14 21:30:50
8KB
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