大家好，我自己才接触R语言不久，现在在尝试做nomo图，但是一直有报错，代码如下：
dd<-datadist(train.plus.rad_score)
options(datadist="dd")
nom<-nomogram(crmodel, fun=list(function(x) surv(24, x)), lp=F, funlabel=c("6 month survival"), maxscale=10, fun.at=c(0.95, 0.85,0.75, 0.65, 0.5))

之后就有报错
Error in lims[[i]] : subscript out of bounds
In addition: Warning message:
In structure(limits, class = "data.frame", row.names = c("Low:effect",  :
  Calling 'structure(NULL, *)' is deprecated, as NULL cannot have attributes.
  Consider 'structure(list(), *)' instead.

请问各位有遇到这个问题吗？非常感谢！