> library(splines)
> x=1:10
> bs(x,degree=3,knots=c(2))
               1          2          3           4
[1,] 0.00000000 0.00000000 0.00000000 0.000000000
[2,] 0.79012346 0.19753086 0.01234568 0.000000000
[3,] 0.52932099 0.38753858 0.08118731 0.001953125
[4,] 0.33333333 0.45833333 0.19270833 0.015625000
[5,] 0.19290123 0.43885031 0.31551408 0.052734375
[6,] 0.09876543 0.35802469 0.41820988 0.125000000
[7,] 0.04166667 0.24479167 0.46940104 0.244140625
[8,] 0.01234568 0.12808642 0.43769290 0.421875000
[9,] 0.00154321 0.03684414 0.29169078 0.669921875
[10,] 0.00000000 0.00000000 0.00000000 1.000000000


请问bs输出红色的部分是什么意思？谢谢