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Chapter 9: Statistical Pattern Recognition                      343




                                                            ROC Curve
                                        1

                                       0.9

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                                       )  1
                                      P( CC ω  0.6

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                                         0   0.1  0.2  0.3  0.4  0.5  0.6  0.7  0.8  0.9  1
                                                              P(FA)

                                     9
                                     9
                               GU
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                              F FI F F U URE G 9.  RE RE RE 9. 9. 9. 9  9
                              This shows the ROC curve for Example 9.8.
                                    B
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                                  T AB BL B L E  9 .. .1 1 1
                                         1
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                                        9.
                                        9
                                   A
                                  MATLAB Functions for Working with Classification Trees
                                               Purpose                   MATLAB Function
                                  Grows the initial large tree               csgrowc
                                  Gets a sequence of minimal complexity trees  csprunec
                                  Returns the class for a set of features, using   cstreec
                                   the decision tree
                                  Plots a tree                             csplotreec
                                  Given a sequence of subtrees and an index for   cspicktreec
                                   the best tree, extract the tree (also cleans out
                                   the tree)
                             we will be concerned only with the case where all features are continuous
                             random variables. The interested reader is referred to Breiman, et al. [1984],
                             Webb [1999], and Duda, Hart and Stork [2001] for more information on the
                             other cases.

                            © 2002 by Chapman & Hall/CRC
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