function?xc?=?DownSample（xr）%對矩陣x，取因子r進行下采樣，xc為列向量
?[mn]?=?size（x）;
?newx?=?reshape（xm*n1）;
?
i?=?1;
k?=?1;
while?i?<=?m*n
????xc（k1）?=?newx（i1）;
????i?=?i?+?r;
????k?=?k?+?1;
end

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2018-09-16?19:31??人臉識別程序\
?????文件?????????214??2018-05-14?11:05??人臉識別程序\DownSample.m
?????文件?????????604??2018-05-14?10:38??人臉識別程序\getGaborKernel.m
?????文件?????????813??2018-05-15?10:22??人臉識別程序\GetOneImageVector.m
?????文件?????????195??2018-05-14?14:26??人臉識別程序\Normalize.m
?????目錄???????????0??2018-09-16?19:31??人臉識別程序\ORL\
?????目錄???????????0??2018-09-16?19:31??人臉識別程序\ORL\s1\
?????目錄???????????0??2018-09-16?19:31??人臉識別程序\ORL\s10\
?????文件???????10318??1994-04-18?14:18??人臉識別程序\ORL\s10\1.pgm
?????文件???????10318??1994-04-18?14:07??人臉識別程序\ORL\s10\10.pgm
?????文件???????10318??1994-04-18?14:18??人臉識別程序\ORL\s10\2.pgm
?????文件???????10318??1994-04-18?14:18??人臉識別程序\ORL\s10\3.pgm
?????文件???????10318??1994-04-18?14:18??人臉識別程序\ORL\s10\4.pgm
?????文件???????10318??1994-04-18?14:18??人臉識別程序\ORL\s10\5.pgm
?????文件???????10318??1994-04-18?14:07??人臉識別程序\ORL\s10\6.pgm
?????文件???????10318??1994-04-18?14:07??人臉識別程序\ORL\s10\7.pgm
?????文件???????10318??1994-04-18?14:07??人臉識別程序\ORL\s10\8.pgm
?????文件???????10318??1994-04-18?14:07??人臉識別程序\ORL\s10\9.pgm
?????目錄???????????0??2018-09-16?19:31??人臉識別程序\ORL\s11\
?????文件???????10318??1994-04-18?14:18??人臉識別程序\ORL\s11\1.pgm
?????文件???????10318??1994-04-18?14:07??人臉識別程序\ORL\s11\10.pgm
?????文件???????10318??1994-04-18?14:18??人臉識別程序\ORL\s11\2.pgm
?????文件???????10318??1994-04-18?14:18??人臉識別程序\ORL\s11\3.pgm
?????文件???????10318??1994-04-18?14:18??人臉識別程序\ORL\s11\4.pgm
?????文件???????10318??1994-04-18?14:18??人臉識別程序\ORL\s11\5.pgm
?????文件???????10318??1994-04-18?14:07??人臉識別程序\ORL\s11\6.pgm
?????文件???????10318??1994-04-18?14:07??人臉識別程序\ORL\s11\7.pgm
?????文件???????10318??1994-04-18?14:07??人臉識別程序\ORL\s11\8.pgm
?????文件???????10318??1994-04-18?14:07??人臉識別程序\ORL\s11\9.pgm
?????目錄???????????0??2018-09-16?19:31??人臉識別程序\ORL\s12\
?????文件???????10318??1994-04-18?14:18??人臉識別程序\ORL\s12\1.pgm
............此處省略419個文件信息