For now, freqtab function cannot treat the vector which contains any missing value.
In general, the missing values in the data frame could be omitted before analyzing. However, for example, in single group design, assuming that one subject does not response to Test A but response Test B and we want to take the equivalent score A on scale B, we should choose methods to handle this missing as below.
Remove records contains any missing from both tests and calculate moments or percentile.
Preserve records on the test in which the subject responds at least. In other words, this method is removing missing values separately.
freqtab should be designed to be able to choose which method the user wants to use.
takuizum
commented
4 years ago
For now,
freqtabfunction cannot treat the vector which contains any missing value.In general, the missing values in the data frame could be omitted before analyzing. However, for example, in single group design, assuming that one subject does not response to Test A but response Test B and we want to take the equivalent score A on scale B, we should choose methods to handle this missing as below.
freqtabshould be designed to be able to choose which method the user wants to use.