How to specify degree argument in ns() in R, for constructing natural spline of degree 5?
library(ISLR)
fit=lm(wage~bs(age ,knots =c(25 ,40 ,60),degree = 5,),data=Wage)
fit=lm(wage~ns(age ,knots =c(25 ,40 ,60),degree = 5,),data=Wage)
I am able to build a regression spline of degree 5 polynomial, but how do I build a natural spline of degree 5, as the ns() function lacks a degree argument.
I am only able to produce a cubic natural spline using ns().
Are there any other functions that could be used to produce let's say quadratic natural splines, etc?
r regression
asked Nov 16 '18 at 7:35
Steve austinSteve austin
869
add a comment |
library(ISLR)
fit=lm(wage~bs(age ,knots =c(25 ,40 ,60),degree = 5,),data=Wage)
fit=lm(wage~ns(age ,knots =c(25 ,40 ,60),degree = 5,),data=Wage)
I am able to build a regression spline of degree 5 polynomial, but how do I build a natural spline of degree 5, as the ns() function lacks a degree argument.
I am only able to produce a cubic natural spline using ns().
Are there any other functions that could be used to produce let's say quadratic natural splines, etc?
r regression
asked Nov 16 '18 at 7:35
Steve austinSteve austin
869
add a comment |
library(ISLR)
fit=lm(wage~bs(age ,knots =c(25 ,40 ,60),degree = 5,),data=Wage)
fit=lm(wage~ns(age ,knots =c(25 ,40 ,60),degree = 5,),data=Wage)
I am able to build a regression spline of degree 5 polynomial, but how do I build a natural spline of degree 5, as the ns() function lacks a degree argument.
I am only able to produce a cubic natural spline using ns().
Are there any other functions that could be used to produce let's say quadratic natural splines, etc?
r regression
asked Nov 16 '18 at 7:35
Steve austinSteve austin
869
library(ISLR)
fit=lm(wage~bs(age ,knots =c(25 ,40 ,60),degree = 5,),data=Wage)
fit=lm(wage~ns(age ,knots =c(25 ,40 ,60),degree = 5,),data=Wage)
I am able to build a regression spline of degree 5 polynomial, but how do I build a natural spline of degree 5, as the ns() function lacks a degree argument.
I am only able to produce a cubic natural spline using ns().
Are there any other functions that could be used to produce let's say quadratic natural splines, etc?
r regression
r regression
asked Nov 16 '18 at 7:35
Steve austinSteve austin
869
asked Nov 16 '18 at 7:35
Steve austinSteve austin
869
asked Nov 16 '18 at 7:35
Steve austinSteve austin
869
asked Nov 16 '18 at 7:35
Steve austinSteve austin
869
asked Nov 16 '18 at 7:35
Steve austinSteve austin
869
869
add a comment |
add a comment |
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