65 lines
2.1 KiB
C++
65 lines
2.1 KiB
C++
// Copyright 2014 Conrad Sanderson (http://conradsanderson.id.au)
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// Copyright 2014 National ICT Australia (NICTA)
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// ------------------------------------------------------------------------
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// Demonstration of how to connect Armadillo with Matlab mex functions.
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// Version 0.2
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#include "armaMex.hpp"
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void
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mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
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{
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// Check the number of input arguments.
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if (nrhs != 2)
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mexErrMsgTxt("Incorrect number of input arguments.");
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// Check type of input.
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if ( (mxGetClassID(prhs[0]) != mxDOUBLE_CLASS) || (mxGetClassID(prhs[1]) != mxDOUBLE_CLASS) )
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mexErrMsgTxt("Input must me of type double.");
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// Check if input is real.
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if ( (mxIsComplex(prhs[0])) || (mxIsComplex(prhs[1])) )
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mexErrMsgTxt("Input must be real.");
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// Create matrices X and Y from the first and second argument.
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mat X = armaGetPr(prhs[0]);
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mat Y = armaGetPr(prhs[1]);
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// Our calculations require that matrices must be of the same size
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if ( arma::size(X) != arma::size(Y) )
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mexErrMsgTxt("Matrices should be of same size.");
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// Perform calculations
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mat A = X + Y;
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mat B = X % Y; // % means element-wise multiplication in Armadillo
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// Create cube C with A and B as slices.
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cube C(A.n_rows, A.n_cols, 2);
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C.slice(0) = A;
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C.slice(1) = B;
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// Create the output argument plhs[0] to return cube C
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plhs[0] = armaCreateMxMatrix(C.n_rows, C.n_cols, C.n_slices);
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// Return the cube C as plhs[0] in Matlab/Octave
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armaSetCubePr(plhs[0], C);
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return;
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}
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