ggrcs (version 0.4.3)

singlercs: singlercs

Description

A Function to Draw Restricted Cubic Splines (RCS)

Value

a picture

Arguments

data

need a dataframe

fit

You need the fitted model.Must be lrm , ols or coxph.

x

The target variable you wish to fit. It is displayed on the X-axis when plotting.

Details

You can use this function to easily draw a restricted cubic spline.The function draws the graph through ggplot2.RCS fitting requires the use of the rcs function of the RMS package.Can fit cox regression,logistic regression and linear regression models.

Examples

library(rms)
library(ggplot2)
library(scales)
dt<-smoke
dd<-datadist(dt)
options(datadist='dd')
fit<- cph(Surv(time,status==1) ~ rcs(age,4)+gender, x=TRUE, y=TRUE,data=dt)
###one group
singlercs(data=dt,fit=fit,x="age")
##two groups
singlercs(data=dt,fit=fit,x="age",group="gender")