The Sashelp.Comet
data set provides information from the following experiment. Twenty-four male rats were divided into four groups. Three groups
received a daily oral dose of a 1,2-dimethylhydrazine dihydrochloride in three dose levels (low, medium, and high, respectively);
the fourth group was a control group. Three additional animals received a positive control. Cell suspensions for each animal
were scored for DNA damage by using a comet assay (Ghebretinsae et al., 2013). The following steps display information about the Sashelp.Comet
data set and create Figure B.6:
title 'Comet Data'; proc contents data=sashelp.Comet varnum; ods select position; run; title 'The First Five Observations Out of 4,050'; proc print data=sashelp.Comet(obs=5); run;