I am trying to plot a smoothing spline to using the following code, and an
error pops up:

> car <- read.table("car.csv",sep=",",header=T)
> attach(car)
> names(car)
 [1] "veh_value" "exposure"  "clm"       "numclaims" "claimcst0" "veh_body"
 [7] "veh_age"   "gender"    "area"      "agecat"    "X_OBSTAT_"

> plot( log(veh_value), claimcst0, ylim=c(0,10000))
> smooth.spline( log(veh_value), claimcst0)
Error in smooth.spline(log(veh_value), claimcst0) :
  NA/NaN/Inf in foreign function call (arg 3)
### What does this error mean> I do not get it??

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