\contentsline {figure}{\numberline {1}{\ignorespaces Heroic successes with PITS}}{3}
\contentsline {figure}{\numberline {2}{\ignorespaces Severities for robotic missions.}}{4}
\contentsline {figure}{\numberline {3}{\ignorespaces Severities for human-rated missions.}}{4}
\contentsline {figure}{\numberline {4}{\ignorespaces Reviewing severity levels}}{5}
\contentsline {figure}{\numberline {5}{\ignorespaces Tokenization}}{6}
\contentsline {figure}{\numberline {6}{\ignorespaces Stop words}}{6}
\contentsline {figure}{\numberline {7}{\ignorespaces Applying a stop-list.}}{6}
\contentsline {figure}{\numberline {8}{\ignorespaces Some stemming rules.}}{6}
\contentsline {figure}{\numberline {9}{\ignorespaces Using a downloaded stemmer.}}{6}
\contentsline {figure}{\numberline {10}{\ignorespaces Preparation.}}{7}
\contentsline {figure}{\numberline {11}{\ignorespaces tfidf.awk.}}{7}
\contentsline {figure}{\numberline {12}{\ignorespaces Finding the 100 highest Tf*Idf words}}{7}
\contentsline {figure}{\numberline {13}{\ignorespaces Sample 10-way classification results.}}{8}
\contentsline {figure}{\numberline {14}{\ignorespaces Some precision, recall, f-measures from Figure\nobreakspace {}13\hbox {}.}}{8}
\contentsline {figure}{\numberline {15}{\ignorespaces Data sets in the this study.}}{8}
\contentsline {figure}{\numberline {16}{\ignorespaces Effects of stopping and stemming.}}{9}
\contentsline {figure}{\numberline {17}{\ignorespaces Tf*Idf scoring for the stopped, stemmed tokens}}{9}
\contentsline {figure}{\numberline {18}{\ignorespaces Top 1 to 50 terms found by TF*IDF, sorted by infogain.}}{9}
\contentsline {figure}{\numberline {19}{\ignorespaces Top 51 to 100 terms found by TF*IDF, sorted by infogain.}}{10}
\contentsline {figure}{\numberline {20}{\ignorespaces Re-writing issue reports as frequency counts.}}{10}
\contentsline {figure}{\numberline {21}{\ignorespaces Frequency counts in the data}}{10}
\contentsline {figure}{\numberline {22}{\ignorespaces Data set ``a''; top 100 tokens; learned rules.}}{12}
\contentsline {figure}{\numberline {23}{\ignorespaces Data set ``a''; top 3 tokens; learned rules. }}{12}
\contentsline {figure}{\numberline {24}{\ignorespaces Data set ``b''; top 100 tokens; learned rules.}}{12}
\contentsline {figure}{\numberline {25}{\ignorespaces Data set ``b''; top 3 tokens; learned rules. }}{12}
\contentsline {figure}{\numberline {26}{\ignorespaces Data set ``c''; top 100 tokens; learned rules.}}{12}
\contentsline {figure}{\numberline {27}{\ignorespaces Data set ``c''; top 3 tokens; learned rules. }}{13}
\contentsline {figure}{\numberline {28}{\ignorespaces Data set ``d''; top 100 tokens; learned rules. }}{13}
\contentsline {figure}{\numberline {29}{\ignorespaces Data set ``d''; top 3 tokens; learned rules. }}{13}
\contentsline {figure}{\numberline {30}{\ignorespaces Data set ``e''; top 100 tokens; learned rules.}}{13}
\contentsline {figure}{\numberline {31}{\ignorespaces Data set ``e''; top 3 tokens; learned rules. }}{13}