function?images?=?loadMNISTImages（filename）
%loadMNISTImages?returns?a?28x28x[number?of?MNIST?images]?matrix?containing
%the?raw?MNIST?images

fp?=?fopen（filename?‘rb‘）;
assert（fp?~=?-1?[‘Could?not?open?‘?filename?‘‘]）;

magic?=?fread（fp?1?‘int32‘?0?‘ieee-be‘）;
assert（magic?==?2051?[‘Bad?magic?number?in?‘?filename?‘‘]）;

numImages?=?fread（fp?1?‘int32‘?0?‘ieee-be‘）;
numRows?=?fread（fp?1?‘int32‘?0?‘ieee-be‘）;
numCols?=?fread（fp?1?‘int32‘?0?‘ieee-be‘）;

images?=?fread（fp?inf?‘unsigned?char‘）;
images?=?reshape（images?numCols?numRows?numImages）;
images?=?permute（images[2?1?3]）;

fclose（fp）;

%?Reshape?to?#pixels?x?#examples
images?=?reshape（images?size（images?1）?*?size（images?2）?size（images?3））;
%?Convert?to?double?and?rescale?to?[01]
images?=?double（images）?/?255;
images?=?images‘;
end

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件???????10752??2018-05-04?21:53??libsvmread.mexw64
?????文件????????9728??2018-05-04?21:53??libsvmwrite.mexw64
?????文件?????????852??2018-05-05?00:13??loadMNISTImages.m
?????文件?????????533??2018-05-04?14:15??loadMNISTLabels.m
?????文件?????????140??2018-05-22?21:32??readme!.txt
?????文件??????359713??2018-05-05?10:08??result.docx
?????文件???????24064??2018-05-04?21:53??svmpredict.mexw64
?????文件???????62464??2018-05-04?21:53??svmtrain.mexw64
?????文件?????7840016??1998-01-26?23:07??t10k-images
?????文件???????10008??1998-01-26?23:07??t10k-labels
?????文件????47040016??1996-11-18?23:36??train-images
?????文件???????60008??1996-11-18?23:36??train-labels
?????文件????????1717??2018-05-05?00:02??Untitled6.m