R:KM曲线在生存包变化x轴范围内绘制

我正在使用生存包为两个种群生成KM曲线，但当我试图定义xmax参数时，我无法将x轴范围从0-15扩展到0-50

这是我的密码：

 library(sm)
library(survival)
comb = read.csv("S:/Novocure/ChemoSKTime2Resp.csv", head = TRUE)
comb
survobj = with(comb, Surv(SK.response.time,Censored))
survobj

# Compare the survival distributions of nonresponders(0) and responders(1)

fitresp = survfit(survobj ~ response, data=comb)
fitresp
summary(fitresp)

# plot the survival distributions by response

plot(fitresp, xlab="Tumor Progression Time in Months", 
  ylab="% Progressed", yscale=100, col=c("red","blue"),
  main="Chemo Time to Tumor Progression Distribution", xmax = 50) 
  legend("topright", title="Chi-sq = 5.2, P = 0.0222", 
  c("Non-responders", "Responders"), fill=c("red", "blue"))

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plot.survfit

的

xmax

参数似乎只会缩短x轴的范围。要扩展它，请改用参数

xlim

：

plot(fitresp, xlab="Tumor Progression Time in Months", 
  ylab="% Progressed", yscale=100, col=c("red","blue"),
  main="Chemo Time to Tumor Progression Distribution", xlim = c(0,50))

---

在示例代码中包含

rm（list=ls（））

是一种非常糟糕的形式——一种幼稚的方式，用户可以在他们工作的会话中运行它。另外，我们应该如何访问您的csv文件？