summary still shows NAs after using both na.omit and complete.cases

Question

I am a grad student using R and have been reading the other Stack Overflow answers regarding removing rows that contain NA from dataframes. I have tried both na.omit and comple

Answer 1

1. The error is that you actually didn't assign the output from na.omit !

   Perios <- na.omit(Perios)

2. If you know which column the NAs occur in, then you can just do

   Perios[!is.na(Perios$Periostitis),]

or more generally:

Perios[!is.na(Perios$colA) & !is.na(Perios$colD) & ... ,]

Then as a general safety tip for R, throw in an na.fail to assert it worked:

na.fail(Perios)  # trust, but verify! Die Paranoia ist gesund.