function?cendata?=?center（?testdata?）

meandata?=?mean（testdata2）;
for?i?=?1:size（testdata2）
????cendata（:i）?=?testdata（:i）?-?meandata;
end

end

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件?????????148??2015-06-25?08:21??center.m
?????文件???????43441??2017-12-11?15:01??face.fig
?????文件????????7898??2017-12-11?15:01??face.m
?????目錄???????????0??2017-12-12?18:22??ORL人臉數據庫\
?????目錄???????????0??2017-12-09?14:20??ORL人臉數據庫\s1\
?????文件???????11384??2010-03-24?19:05??ORL人臉數據庫\s1\s1?（1）.bmp
?????文件???????11384??2010-03-24?19:43??ORL人臉數據庫\s1\s1?（10）.bmp
?????文件???????11384??2010-03-24?19:42??ORL人臉數據庫\s1\s1?（2）.bmp
?????文件???????11384??2010-03-24?19:44??ORL人臉數據庫\s1\s1?（3）.bmp
?????文件???????11384??2010-03-24?19:44??ORL人臉數據庫\s1\s1?（4）.bmp
?????文件???????11384??2010-03-24?19:44??ORL人臉數據庫\s1\s1?（5）.bmp
?????文件???????11384??2010-03-24?19:45??ORL人臉數據庫\s1\s1?（6）.bmp
?????文件???????11384??2010-03-24?19:45??ORL人臉數據庫\s1\s1?（7）.bmp
?????文件???????11384??2010-03-24?19:45??ORL人臉數據庫\s1\s1?（8）.bmp
?????文件???????11384??2010-03-24?19:45??ORL人臉數據庫\s1\s1?（9）.bmp
?????目錄???????????0??2017-12-09?14:20??ORL人臉數據庫\s10\
?????文件???????11384??2010-03-25?19:23??ORL人臉數據庫\s10\1.bmp
?????文件???????10318??1994-04-18?14:18??ORL人臉數據庫\s10\1.pgm
?????文件???????11384??2010-03-25?19:23??ORL人臉數據庫\s10\10.bmp
?????文件???????10318??1994-04-18?14:07??ORL人臉數據庫\s10\10.pgm
?????文件???????11384??2010-03-25?19:23??ORL人臉數據庫\s10\2.bmp
?????文件???????10318??1994-04-18?14:18??ORL人臉數據庫\s10\2.pgm
?????文件???????11384??2010-03-25?19:23??ORL人臉數據庫\s10\3.bmp
?????文件???????10318??1994-04-18?14:18??ORL人臉數據庫\s10\3.pgm
?????文件???????11384??2010-03-25?19:23??ORL人臉數據庫\s10\4.bmp
?????文件???????10318??1994-04-18?14:18??ORL人臉數據庫\s10\4.pgm
?????文件???????11384??2010-03-25?19:23??ORL人臉數據庫\s10\5.bmp
?????文件???????10318??1994-04-18?14:18??ORL人臉數據庫\s10\5.pgm
?????文件???????11384??2010-03-25?19:23??ORL人臉數據庫\s10\6.bmp
?????文件???????10318??1994-04-18?14:07??ORL人臉數據庫\s10\6.pgm
?????文件???????11384??2010-03-25?19:23??ORL人臉數據庫\s10\7.bmp
............此處省略827個文件信息