function?Average_Precision=Average_precision（Outputstest_target）
%Computing?the?average?precision
%Outputs:?the?predicted?outputs?of?the?classifier?the?output?of?the?ith?instance?for?the?jth?class?is?stored?in?Outputs（ji）
%test_target:?the?actual?labels?of?the?test?instances?if?the?ith?instance?belong?to?the?jth?class?test_target（ji）=1?otherwise?test_target（ji）=-1

????[num_classnum_instance]=size（Outputs）;
????temp_Outputs=[];
????temp_test_target=[];
????for?i=1:num_instance
????????temp=test_target（:i）;
????????if（（sum（temp）~=num_class）&（sum（temp）~=-num_class））
????????????temp_Outputs=[temp_OutputsOutputs（:i）];
????????????temp_test_target=[temp_test_targettemp];
????????end
????end
????Outputs=temp_Outputs;
????test_target=temp_test_target;?????
????[num_classnum_instance]=size（Outputs）;
????
????Label=cell（num_instance1）;
????not_Label=cell（num_instance1）;
????Label_size=zeros（1num_instance）;
????for?i=1:num_instance
????????temp=test_target（:i）;
????????Label_size（1i）=sum（temp==ones（num_class1））;
????????for?j=1:num_class
????????????if（temp（j）==1）
????????????????Label{i1}=[Label{i1}j];
????????????else
????????????????not_Label{i1}=[not_Label{i1}j];
????????????end
????????end
????end
????
????aveprec=0;
????for?i=1:num_instance
????????temp=Outputs（:i）;
????????[tempvalueindex]=sort（temp）;
????????indicator=zeros（1num_class）;
????????for?m=1:Label_size（i）
????????????[tempvalueloc]=ismember（Label{i1}（m）index）;
????????????indicator（1loc）=1;
????????end
????????summary=0;
????????for?m=1:Label_size（i）
????????????[tempvalueloc]=ismember（Label{i1}（m）index）;
????????????summary=summary+sum（indicator（loc:num_class））/（num_class-loc+1）;
????????end
????????ap_binary（i）=summary/Label_size（i）;
????????aveprec=aveprec+summary/Label_size（i）;
????end
????Average_Precision=aveprec/num_instance;

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????1910??2005-04-21?16:43??Average_precision.m

?????文件???????1334??2005-01-23?22:10??coverage.m

?????文件????????539??2005-01-23?21:39??Hamming_loss.m

?????文件???????4763??2005-06-08?10:44??MLKNN_test.m

?????文件???????3685??2005-06-08?10:44??MLKNN_train.m

?????文件???????1727??2005-05-31?14:52??One_error.m

?????文件???????1681??2005-04-21?16:43??Ranking_loss.m

-----------?---------??----------?-----??----

????????????????15639????????????????????7