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revision 1.52 by tjl, Sun Mar 23 20:16:05 2003 UTC revision 1.53 by tjl, Mon Mar 24 16:24:27 2003 UTC
# Line 1248  for most of the use. Line 1248  for most of the use.
1248  \centering  \centering
1249  %\fbox{\vbox{\vskip 3in}}  %\fbox{\vbox{\vskip 3in}}
1250  \ifpics  \ifpics
1251  \includegraphics[width=6cm]{zipf}  \includegraphics[width=6cm]{zipfarea.1}
1252  \fi  \fi
1253  \caption{  \caption{
1254  \label{fig-zipf}  \label{fig-zipf}
1255  Idealized representation of typical document usage pattern according  Zipf's law concretized: why remembering 15 textures helps.
1256  to Zipf's law:  In real life, accesses to documents often follow Zipf's law, meaning that
1257  the solid curve represents the access count as a function of rank  some documents get accessed far more often than most.
1258  for 100 documents (only the first 15 shown)  Each square represents a document, and the area of each square is scaled
1259  and the dotted curve represents the cumulative proportion of accesses.  to its rate of accesses.
1260    The diagram shows 2000 documents weighted with Zipf's law with exponent 1.1.
1261  The 15 most important documents account XXX\% of the accesses.  The 15 most important documents account XXX\% of the accesses.
1262  }  }
1263  \end{figure}  \end{figure}

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