Object not found error although column is in the table (data.table format)-CodePudding

I have defined a following function:

counter<-function(data,varname){
  data[is.na(varname),.N]
}

When I pass the arguments:

counter(df,ip_address_ts)

I get the error:

Error in .checkTypos(e, names_x) : Object 'ip_address_ts' not found. Perhaps you intended ip_address_ts, email_address_ts

ip_address_ts is in df, so why does this not work?

CodePudding user response：

Your code is looking the object ip_address_ts, not the string "ip_address_ts"

counter(df, "ip_address_ts")

CodePudding user response：

Solution is to use get and then pass the column name as string:

counter<-function(data,varname){
  data[is.na(get(varname)),.N]
}
  

counter(df,"ip_address_ts")

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