function?d?=?distance（ab）
%?DISTANCE?-?computes?Euclidean?distance?matrix
%
%?E?=?distance（AB）
%
%????A?-?（DxM）?matrix?
%????B?-?（DxN）?matrix
%
%?Returns:
%????E?-?（MxN）?Euclidean?distances?between?vectors?in?A?and?B
%
%
%?Description?:?
%????This?fully?vectorized?（VERY?FAST!）?m-file?computes?the?
%????Euclidean?distance?between?two?vectors?by:
%
%?????????????????||A-B||?=?sqrt?（?||A||^2?+?||B||^2?-?2*A.B?）
%
%?Example?:?
%????A?=?rand（400100）;?B?=?rand（400200）;
%????d?=?distance（AB）;

%?Author???:?Roland?Bunschoten
%????????????University?of?Amsterdam
%????????????Intelligent?Autonomous?Systems?（IAS）?group
%????????????Kruislaan?403??1098?SJ?Amsterdam
%????????????tel.（+31）20-5257524
%????????????bunschot@wins.uva.nl
%?Last?Rev?:?Oct?29?16:35:48?MET?DST?1999
%?Tested???:?PC?Matlab?v5.2?and?Solaris?Matlab?v5.3
%?Thanx????:?Nikos?Vlassis

%?Copyright?notice:?You?are?free?to?modify?extend?and?distribute?
%????this?code?granted?that?the?author?of?the?original?code?is?
%????mentioned?as?the?original?author?of?the?code.

if?（nargin?~=?2）
???error（‘Not?enough?input?arguments‘）;
end

if?（size（a1）?~=?size（b1））
???error（‘A?and?B?should?be?of?same?dimensionality‘）;
end

aa=sum（a.*a1）;?bb=sum（b.*b1）;?ab=a‘*b;?
d?=?sqrt（abs（repmat（aa‘[1?size（bb2）]）?+?repmat（bb[size（aa2）?1]）?-?2*ab））;

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2017-09-04?21:07??DCIAS_GSA\
?????目錄???????????0??2017-09-04?21:07??DCIAS_GSA\NEW?RESULTS\
?????文件????????1045??2017-09-04?21:07??DCIAS_GSA\NEW?RESULTS\abalone_NEW_50.mat
?????文件????????1040??2017-09-04?21:07??DCIAS_GSA\NEW?RESULTS\arrhythmia_NEW_50.mat
?????文件????????1049??2017-09-04?21:07??DCIAS_GSA\NEW?RESULTS\balanceScale_NEW_50.mat
?????文件?????????874??2017-09-04?21:07??DCIAS_GSA\NEW?RESULTS\balanceScale_New.mat
?????文件?????????883??2017-09-04?21:07??DCIAS_GSA\NEW?RESULTS\carEval_NEW.mat
?????文件????????1043??2017-09-04?21:07??DCIAS_GSA\NEW?RESULTS\carEval_NEW_50.mat
?????文件????????1046??2017-09-04?21:07??DCIAS_GSA\NEW?RESULTS\dermatology_NEW_50.mat
?????文件????????1042??2017-09-04?21:07??DCIAS_GSA\NEW?RESULTS\ecoli_NEW_50.mat
?????文件????????1040??2017-09-04?21:07??DCIAS_GSA\NEW?RESULTS\gene_NEW_50.mat
?????文件????????1035??2017-09-04?21:07??DCIAS_GSA\NEW?RESULTS\glass_NEW.mat
?????文件????????1036??2017-09-04?21:07??DCIAS_GSA\NEW?RESULTS\glass_NEW_50.mat
?????文件????????1043??2017-09-04?21:07??DCIAS_GSA\NEW?RESULTS\hayes_NEW.mat
?????文件????????1024??2017-09-04?21:07??DCIAS_GSA\NEW?RESULTS\hayes_NEW_50.mat
?????文件????????1044??2017-09-04?21:07??DCIAS_GSA\NEW?RESULTS\horse_NEW_50.mat
?????文件????????1047??2017-09-04?21:07??DCIAS_GSA\NEW?RESULTS\nursery_NEW_50.mat
?????文件????????1046??2017-09-04?21:07??DCIAS_GSA\NEW?RESULTS\pageblocks_NEW_50.mat
?????文件????????1044??2017-09-04?21:07??DCIAS_GSA\NEW?RESULTS\satimage_NEW_50.mat
?????文件????????1038??2017-09-04?21:07??DCIAS_GSA\NEW?RESULTS\soybean_NEW_50.mat
?????文件????????1039??2017-09-04?21:07??DCIAS_GSA\NEW?RESULTS\thyroid_NEW_50.mat
?????文件????????1029??2017-09-04?21:07??DCIAS_GSA\NEW?RESULTS\wine_NEW_50.mat
?????文件????????1046??2017-09-04?21:07??DCIAS_GSA\NEW?RESULTS\yeast_NEW_50.mat
?????文件?????????878??2017-09-04?21:07??DCIAS_GSA\NEW?RESULTS\zoo_NEW_50.mat
?????文件???????11887??2017-09-04?21:07??DCIAS_GSA\NEW.m
?????文件????????1661??2017-09-04?21:07??DCIAS_GSA\README.md
?????文件?????????389??2017-09-04?21:07??DCIAS_GSA\Solution.m
?????目錄???????????0??2017-09-04?21:07??DCIAS_GSA\dataset\
?????文件?????4135242??2017-09-04?21:07??DCIAS_GSA\dataset\abalone.dt
?????文件??????376441??2017-09-04?21:07??DCIAS_GSA\dataset\arrhythmia.dt
?????文件????????8766??2017-09-04?21:07??DCIAS_GSA\dataset\balanceScale.dt
............此處省略18個文件信息