Lesson 3/11 and moved eigenfaces folder from 29/9 lesson folder

11-3/eigenfaces/readyalefaces_to_tensor.m

@@ -0,0 +1,34 @@
+function [F,descr] = readyalefaces_to_tensor(str)
+
+if not(exist('str','var'))
+    str='all';
+end
+switch str
+    case 'easy'
+        extensions = {'happy', 'normal', 'sad', 'sleepy', 'surprised', 'wink' };
+    case 'easy-nowink'
+        extensions = {'happy', 'normal', 'sad', 'sleepy', 'surprised' };
+    case 'nowink'
+        extensions = {'centerlight', 'glasses', 'happy', 'leftlight', 'noglasses', 'normal', 'rightlight', 'sad', 'sleepy', 'surprised' };
+    case {'hard','all'}
+        extensions = {'centerlight', 'glasses', 'happy', 'leftlight', 'noglasses', 'normal', 'rightlight', 'sad', 'sleepy', 'surprised', 'wink' };
+    otherwise
+        error 'unknown selector';
+end
+
+for i = 1 : 15,
+    basename = 'yalefaces/subject';
+    if( i < 10 )
+        basename = [basename, '0', num2str(i)];
+    else
+        basename = [basename, num2str(i)];
+    end;
+
+    for j = 1:length(extensions),
+        fullname = [basename, '.', extensions{j}, '.gif'];
+        X = imread(fullname);
+        F(:,:,j,i) = double(X)/255;
+    end;
+
+end;
+descr=extensions;