Error: missing values and NaN's not allowed if 'na.rm' is FALSE

Question

Trying out multiple models chapter of #r4ds and ran into an error message at the end:

Error: missing values and NaN's not allowed if 'na.rm' is FALSE In addition: Warning message: In ns(as.numeric(Month), 4) : NAs introduced by coercion

with

ADA_model<- function(ADA_mutiple_model){
   lm(ADA ~ ns(as.numeric(Month), 4), data=ADA_mutiple_model)
}

ADA_mutiple_model <- ADA_mutiple_model %>% 
     mutate(model=map(data,ADA_model))

as the code I used that creates the error.

See mod3 below to see what the function looks like

You can't use lm if there are NA in your data. Therefore, the error message is straightforward : add the option na.rm=TRUE in lm. I suggest you look at your data as well to understand what is wrong with your data. — jgadoury
@jgadoury I don't think lm has a na.rm argument. Could you mean the na.action argument? — aosmith
Yeah what the hell am I talking about, it's na.action=na.omit. That's what happens when I try to sound smart without double-checking my stuff — jgadoury
That is the right argument, but the problem was on my function — user12081

Zheyuan Li Zheyuan Li · Accepted Answer · 2016-08-16T00:28:10

Your problem has nothing to do with the use of lm, but inside splines::ns when generating B-spline basis for natural cubic splines. Very likely your Month is a character variable, and you can not use as.numeric for coercing.

I just checked your attached figure. The x-axis in the plots verifies what I guessed. You need to use 1:12 for Month, not "JAN", "FEB", etc.

Error: missing values and NaN's not allowed if 'na.rm' is FALSE

1 Answers