PLearn 0.1
RangeVMatrix.cc
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00001 // -*- C++ -*-
00002 
00003 // PLearn (A C++ Machine Learning Library)
00004 // Copyright (C) 1998 Pascal Vincent
00005 // Copyright (C) 1999-2001 Pascal Vincent, Yoshua Bengio, Rejean Ducharme and University of Montreal
00006 // Copyright (C) 2002 Pascal Vincent, Julien Keable, Xavier Saint-Mleux
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  * $Id: RangeVMatrix.cc 5557 2006-05-10 20:36:58Z lamblin $
00039  ******************************************************* */
00040 
00041 #include "RangeVMatrix.h"
00042 
00043 namespace PLearn {
00044 using namespace std;
00045 
00048 PLEARN_IMPLEMENT_OBJECT(RangeVMatrix, "ONE LINE DESC", "NO HELP");
00049 
00050 RangeVMatrix::RangeVMatrix()
00051     : start(0), end(0), step(1)
00052 {
00053 }
00054 
00055 RangeVMatrix::RangeVMatrix(real the_start, real the_end, real the_step)
00056     : start(the_start), end(the_end), step(the_step)
00057 {
00058     build();
00059 }
00060 
00061 void
00062 RangeVMatrix::build()
00063 {
00064     inherited::build();
00065     build_();
00066 }
00067 
00068 void
00069 RangeVMatrix::build_()
00070 {
00071     width_=1;
00072     length_ = (int)((end-start)/step);
00073     if (length_*step==(end-start))
00074         length_++;
00075 }
00076 
00077 void
00078 RangeVMatrix::declareOptions(OptionList &ol)
00079 {
00080     declareOption(ol, "start", &RangeVMatrix::start, OptionBase::buildoption, "");
00081     declareOption(ol, "end", &RangeVMatrix::end, OptionBase::buildoption, "");
00082     declareOption(ol, "step", &RangeVMatrix::step, OptionBase::buildoption, "");
00083     inherited::declareOptions(ol);
00084 }
00085 
00086 real RangeVMatrix::get(int i, int j) const
00087 {
00088 #ifdef BOUNDCHECK
00089     if(j!=0 || i<0 || i>=length())
00090         PLERROR("In RangeVMatrix::get OUT OF BOUNDS");
00091 #endif
00092     return start+i*step;
00093 }
00094 
00095 
00096 } // end of namespace PLearn
00097 
00098 
00099 /*
00100   Local Variables:
00101   mode:c++
00102   c-basic-offset:4
00103   c-file-style:"stroustrup"
00104   c-file-offsets:((innamespace . 0)(inline-open . 0))
00105   indent-tabs-mode:nil
00106   fill-column:79
00107   End:
00108 */
00109 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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