PLearn 0.1
learner_utils.h
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00001 
00002 // -*- C++ -*-
00003 
00004 // learner_utils.h
00005 //
00006 // Copyright (C) 2003  Pascal Vincent 
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  * $Id: learner_utils.h 3994 2005-08-25 13:35:03Z chapados $ 
00038  ******************************************************* */
00039 
00041 #ifndef learner_utils_INC
00042 #define learner_utils_INC
00043 
00044 #include <plearn_learners/generic/PLearner.h>
00045 
00046 namespace PLearn {
00047 using namespace std;
00048 
00049 Mat compute_learner_outputs(PP<PLearner> learner, VMat dataset);
00050 
00051 // Finds appropriate x0, y0, deltax, deltay from the dataset range,
00052 // extraspace of .10 means we'll look 10% beyond the data range on every side
00053 void determine_grid_for_dataset(VMat dataset, int nx, int ny, 
00054                                 real& x0, real& y0, real& deltax, real& deltay, 
00055                                 real extraspace=.10);
00056 
00058 Mat compute_learner_outputs_on_grid(PP<PLearner> learner, int nx, int ny, 
00059                                     real x0, real y0, real deltax, real deltay);
00060 
00061 
00062 double determine_density_integral_from_log_densities_on_grid(Vec log_densities, real deltax, real deltay);
00063 
00065 void DX_write_2D_data(ostream& out, const string& basename, Mat data);
00066 
00069 void DX_write_2D_data_for_grid(ostream& out, const string& basename, 
00070                                int nx, int ny, real x0, real y0, real deltax, real deltay,
00071                                Mat data);
00072 
00074 void DX_save_2D_data(const string& filename, const string& basename, Mat data);
00075 
00078 void DX_save_2D_data_for_grid(const string& filename, const string& basename, 
00079                               int nx, int ny, real x0, real y0, real deltax, real deltay,
00080                               Mat data);
00081 
00082 
00083 } // end of namespace PLearn
00084 
00085 #endif
00086 
00087 
00088 /*
00089   Local Variables:
00090   mode:c++
00091   c-basic-offset:4
00092   c-file-style:"stroustrup"
00093   c-file-offsets:((innamespace . 0)(inline-open . 0))
00094   indent-tabs-mode:nil
00095   fill-column:79
00096   End:
00097 */
00098 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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