function?error=cerror（y1y2label）
%?CERROR?Computes?classification?error.
%
%?Synopsis:
%??error?=?cerror（y1y2）
%??error?=?cerror（y1y2label）?
%
%?Description:
%??error?=?cerror（y1y2）?returns?classification?error?i.e.
%??????error=??1/length（y1）?sum_i?L（?y1（i）?y2（i））
%
%????where?L（ab）=0?if?a==b?and?L（ab）=1?if?a?~=?b.
%
%????error?=?cerror（y1y2label）?considers?only?labels
%????find（y2==label）?i.e.?if?y1y2?from?{-11}?then
%
%???false_positives_rate?=?cerror（y1y2-1）
%???false_negatives_rate?=?cerror（y1y2+1）
%
%?Input:
%??y1?[1?x?n]?Vector?of?integers?（response?of?classifier）.
%??y2?[1?x?n]?Vector?of?integers?（ground?truth）.
%??label?[int]?Selected?label.
%
%?Output:
%??error?[real]?Error.?
%
%?Example:
%??classifier??=?[+1+1+1-1]
%??groundtruth?=?[-1+1-1+1]
%??error?=?cerror（classifiergroundtruth）
%??false_pos?=?cerror（classifiergroundtruth-1）
%??false_neg?=?cerror（classifiergroundtruth1）
%
%?See?also?
%??ROC
%

%?About:?Statistical?Pattern?Recognition?Toolbox
%?（C）?1999-2003?Written?by?Vojtech?Franc?and?Vaclav?Hlavac
%?Czech?Technical?University?Prague
%?Faculty?of?Electrical?Engineering
%?Center?for?Machine?Perception

%?Modifications:
%?09-jun-2004?VF
%?14-Jan-2003?VF

y1=y1（:）;y2=y2（:）;

if?nargin???error=length（find（（y1-y2）~=0））/length（y1）;
else
??inx?=?find（y2==label）;
??error?=?length（?find（y1（inx）~=label）?）/length（y1）;
end

return;

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

?????目錄??????????0??2006-10-18?09:28??svm

?????文件????????671??2006-05-11?16:13??svm\1.mat

?????文件??????16826??2006-05-30?15:05??svm\111.jpg

?????文件???????1509??2006-05-10?19:12??svm\cerror.asv

?????文件???????1507??2006-05-10?19:12??svm\cerror.m

?????文件??????13939??2006-05-30?14:58??svm\demosvm.asv

?????文件???????6560??2006-06-06?09:59??svm\demosvm.fig

?????文件??????14003??2006-06-06?10:08??svm\demosvm.m

?????文件????????694??2006-06-08?13:08??svm\noname.mat

?????文件???????1928??2006-05-11?16:13??svm\pentagon.mat

?????文件???????2372??2005-10-15?11:12??svm\stprpath.asv

?????文件???????2350??2006-05-12?18:25??svm\stprpath.m

?????文件???????3894??2006-05-08?14:37??svm\SVM.fig

?????文件???????6405??2006-06-05?12:46??svm\SVM.m

?????目錄??????????0??2006-10-18?09:28??svm\visual

?????文件????????890??2006-05-30?15:15??svm\visual\fig2jpg.m

?????文件????????645??2006-05-08?20:54??svm\visual\marker_color.m

?????文件????????617??2006-05-08?20:54??svm\visual\marker_type.m

?????文件???????3647??2006-05-10?15:29??svm\visual\pboundary.m

?????文件???????4475??2006-05-10?21:57??svm\visual\ppatterns.m

?????目錄??????????0??2006-10-18?09:28??svm\kernels

?????文件???????1650??2006-05-12?18:40??svm\kernels\kernel.asv

?????文件???????4074??2006-05-12?18:40??svm\kernels\kernel.c

?????文件???????7680??2006-05-12?18:40??svm\kernels\kernel.dll

?????文件???????1623??2006-05-12?18:40??svm\kernels\kernel.m

?????文件??????60621??2006-05-12?18:40??svm\kernels\kernel.mexglx

?????文件???????2112??2006-05-12?18:38??svm\kernels\kernelproj.m

?????文件???????3527??2006-05-12?18:38??svm\kernels\kernelproj_mex.c~

?????文件???????7680??2006-05-12?18:38??svm\kernels\kernelproj_mex.dll

?????文件??????60725??2006-05-12?18:38??svm\kernels\kernelproj_mex.mexglx

............此處省略43個文件信息