updated docs

docs/docs/ml.xml

@@ -171,6 +171,7 @@ Davis E. King. <a href="http://jmlr.csail.mit.edu/papers/volume10/king09a/king09
          <item>test_assignment_function</item>
          <item>test_graph_labeling_function</item>
          <item>test_ranking_function</item>
+         <item>average_precision</item>
       </section>
 
       <section>
@@ -2432,6 +2433,17 @@ Davis E. King. <a href="http://jmlr.csail.mit.edu/papers/volume10/king09a/king09
                                  
       </component>
       
+   <!-- ************************************************************************* -->
+      
+      <component>
+         <name>average_precision</name>
+         <file>dlib/statistics.h</file>
+         <spec_file link="true">dlib/statistics/average_precision_abstract.h</spec_file>
+         <description>
+            This function computes the average precision of a ranking.
+         </description>
+      </component>
+      
    <!-- ************************************************************************* -->
       
       <component>

docs/docs/term_index.xml

@@ -292,6 +292,7 @@
          <term file="ml.html" name="ranking_pair"/>
          <term file="ml.html" name="is_ranking_problem"/>
          <term file="ml.html" name="count_ranking_inversions"/>
+         <term file="ml.html" name="average_precision"/>
          <term file="ml.html" name="test_ranking_function"/>
          <term file="ml.html" name="cross_validate_ranking_trainer"/>
          <term file="ml.html" name="svm_c_ekm_trainer"/>