sdata=read.table("D:/sdata.txt",header=T)
attach(sdata)
num=5
library(splines)
require(stats); require(graphics)
basis=bs(sdata$t, df=num)#产生5个B样条基
for (i in 1:num)
bs.i=basis[,i]
bs11=NULL
for (i in 1:num)
bs11=cbind(bs11,bs.i) #请问这个循环哪里有问题,谢谢!
[/code]