PLearn 0.1
NistDB.h
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00001 // -*- C++ -*-
00002 
00003 // PLearn (A C++ Machine Learning Library)
00004 // Copyright (C) 1998 Pascal Vincent
00005 // Copyright (C) 1999,2000 Pascal Vincent, Yoshua Bengio and University of Montreal
00006 //
00007 
00008 // Redistribution and use in source and binary forms, with or without
00009 // modification, are permitted provided that the following conditions are met:
00010 // 
00011 //  1. Redistributions of source code must retain the above copyright
00012 //     notice, this list of conditions and the following disclaimer.
00013 // 
00014 //  2. Redistributions in binary form must reproduce the above copyright
00015 //     notice, this list of conditions and the following disclaimer in the
00016 //     documentation and/or other materials provided with the distribution.
00017 // 
00018 //  3. The name of the authors may not be used to endorse or promote
00019 //     products derived from this software without specific prior written
00020 //     permission.
00021 // 
00022 // THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
00023 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00024 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
00025 // NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00026 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
00027 // TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00028 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00029 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00030 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00031 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00032 // 
00033 // This file is part of the PLearn library. For more information on the PLearn
00034 // library, go to the PLearn Web site at www.plearn.org
00035 
00036 
00037 
00038 /* *******************************************************      
00039  * $Id: NistDB.h 8231 2007-11-07 20:50:01Z nouiz $
00040  * AUTHORS: Pascal Vincent
00041  * This file is part of the PLearn library.
00042  ******************************************************* */
00043 
00044 
00047 #ifndef NistDB_INC
00048 #define NistDB_INC
00049 
00050 #include <plearn/vmat/VMat.h>
00051 
00052 namespace PLearn {
00053 using namespace std;
00054 
00055 
00056 class NistDB: public VMatrix
00057 {
00058 protected:
00059     // TODO: use PStream?
00060     mutable ifstream imagef;
00061     mutable ifstream labelf;
00062     mutable unsigned char buf[28*28];
00063 
00064 public:
00065 
00066     NistDB(bool train);  
00067   
00068     virtual real get(int i, int j) const;
00069     virtual void getSubRow(int i, int j, Vec v) const;
00070 };
00071 
00072 inline void loadMNIST(VMat& training_set, VMat& test_set)
00073 {
00074     training_set = new NistDB(true);
00075     test_set = new NistDB(false);
00076 }
00077 
00078 } // end of namespace PLearn
00079 
00080 
00081 #endif
00082 
00083 
00084 /*
00085   Local Variables:
00086   mode:c++
00087   c-basic-offset:4
00088   c-file-style:"stroustrup"
00089   c-file-offsets:((innamespace . 0)(inline-open . 0))
00090   indent-tabs-mode:nil
00091   fill-column:79
00092   End:
00093 */
00094 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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