Function renamed 'ltdl.summary' from 'gx.ngr.ltdl' in version 1.1.14.
Displays a table of the counts of negative values, indicating less than the detection limit, and NAs to support the preparation of a NGR Report Table of summary statistics. The table for numerial columns in the data frame displays the variable name, the number of NAs and the number of negative values, and the number of times the value in coded occurs.