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86 lines
2.9 KiB
86 lines
2.9 KiB
% mtimesx_sparse does sparse matrix multiply of two inputs
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%******************************************************************************
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%
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% MATLAB (R) is a trademark of The Mathworks (R) Corporation
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%
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% Function: mtimesx_sparse
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% Filename: mtimesx_sparse.m
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% Programmer: James Tursa
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% Version: 1.00
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% Date: September 27, 2009
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% Copyright: (c) 2009 by James Tursa, All Rights Reserved
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%
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% This code uses the BSD License:
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%
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% Redistribution and use in source and binary forms, with or without
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% modification, are permitted provided that the following conditions are
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% met:
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%
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% * Redistributions of source code must retain the above copyright
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% notice, this list of conditions and the following disclaimer.
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% * Redistributions in binary form must reproduce the above copyright
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% notice, this list of conditions and the following disclaimer in
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% the documentation and/or other materials provided with the distribution
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%
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% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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% AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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% IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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% ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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% LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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% CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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% SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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% INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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% CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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% ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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% POSSIBILITY OF SUCH DAMAGE.
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%
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%--
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%
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% mtimesx_sparse is a helper function for mtimesx and is not intended to be called
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% directly by the user.
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%
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% ---------------------------------------------------------------------------------------------------------------------------------
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function result = mtimesx_sparse(a,transa,b,transb)
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if( transa == 'N' )
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if( transb == 'N' )
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result = a * b;
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elseif( transb == 'G' )
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result = a * conj(b);
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elseif( transb == 'T' )
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result = a * b.';
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else
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result = a * b';
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end
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elseif( transa == 'G' )
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if( transb == 'N' )
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result = conj(a) * b;
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elseif( transb == 'G' )
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result = conj(a) * conj(b);
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elseif( transb == 'T' )
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result = conj(a) * b.';
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else
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result = conj(a) * b';
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end
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elseif( transa == 'T' )
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if( transb == 'N' )
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result = a.' * b;
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elseif( transb == 'G' )
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result = a.' * conj(b);
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elseif( transb == 'T' )
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result = a.' * b.';
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else
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result = a.' * b';
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end
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else
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if( transb == 'N' )
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result = a' * b;
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elseif( transb == 'G' )
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result = a' * conj(b);
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elseif( transb == 'T' )
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result = a' * b.';
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else
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result = a' * b';
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end
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end
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end
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