WHAT’S EASY AND WHAT’S HARD? 331
Figure 1. Ten-fold cross-validation accuracy of models distinguishing The
House of the Seven Gables from each of Hawthorne, Melville, and Cooper.
The x-axis represents the number of iterations of eliminating best features at
previous iteration. The curve well below the others is that of Hawthorne, the
actual author.
Figure 2 Recall-precision for the many-candidates experiment (for various
candidates set sizes).
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