Mercurial > octave
view examples/code/mypow2.c @ 21191:8e317ce26a24
unconditionally define warn_qrupdate_once
* base-qr.h (warn_qrupdate_once): Declare unconditionally.
* dbleQR.cc (warn_qrupdate_once): Define unconditionally.
author | John W. Eaton <jwe@octave.org> |
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date | Thu, 04 Feb 2016 03:04:07 -0500 |
parents | 5c42ff6f0eb1 |
children | c763214a8260 |
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#include "mex.h" void mexFunction (int nlhs, mxArray* plhs[], int nrhs, const mxArray* prhs[]) { mwSize n; mwIndex i; double *vri, *vro; if (nrhs != 1 || ! mxIsDouble (prhs[0])) mexErrMsgTxt ("ARG1 must be a double matrix"); n = mxGetNumberOfElements (prhs[0]); plhs[0] = mxCreateNumericArray (mxGetNumberOfDimensions (prhs[0]), mxGetDimensions (prhs[0]), mxGetClassID (prhs[0]), mxIsComplex (prhs[0])); vri = mxGetPr (prhs[0]); vro = mxGetPr (plhs[0]); if (mxIsComplex (prhs[0])) { double *vii, *vio; vii = mxGetPi (prhs[0]); vio = mxGetPi (plhs[0]); for (i = 0; i < n; i++) { vro[i] = vri[i] * vri[i] - vii[i] * vii[i]; vio[i] = 2 * vri[i] * vii[i]; } } else { for (i = 0; i < n; i++) vro[i] = vri[i] * vri[i]; } }