matlab编程基于直方图人脸识别相关谁帮我解答注释一下

if (subjectindex == M)
axes (handles.axes3)
%image no: 5 is shown for visualization purpose
imshow(imread(STRCAT('ORL\S',num2str(M),'\5.bmp')))
msgbox ( '识别成功！');
else
display ([ 'Error==> Testing Image of Subject >>' num2str(subjectindex) ' matches with the image of subject >> ' num2str(M)])
axes (handles.axes3)
%image no: 5 is shown for visualization purpose
imshow(imread(STRCAT('ORL\S',num2str(M),'\5.bmp')))
msgbox ( '识别失败！');
end

display('Testing Done'