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annotate examples/mystring.c @ 17091:641c47e8bcae

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doc: expand on FFT size argument to fftfilt * fftfilt.m: Explain how the FFT size argument is used and adjusted internally to meet certain constraints.
author Mike Miller <mtmiller@ieee.org>
date Fri, 26 Jul 2013 01:44:06 -0400
parents be41c30bcb44
children 224e76250443
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1 #include <string.h>
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2 #include "mex.h"
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3
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4 void
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5 mexFunction (int nlhs, mxArray *plhs[],
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6 int nrhs, const mxArray *prhs[])
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7 {
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8 mwSize m, n;
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9 mwIndex i, j;
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10 mxChar *pi, *po;
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11
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12 if (nrhs != 1 || ! mxIsChar (prhs[0]) ||
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13 mxGetNumberOfDimensions (prhs[0]) > 2)
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14 mexErrMsgTxt ("ARG1 must be a char matrix");
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16 m = mxGetM (prhs[0]);
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17 n = mxGetN (prhs[0]);
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18 pi = mxGetChars (prhs[0]);
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19 plhs[0] = mxCreateNumericMatrix (m, n, mxCHAR_CLASS, mxREAL);
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20 po = mxGetChars (plhs[0]);
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21
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22 for (j = 0; j < n; j++)
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23 for (i = 0; i < m; i++)
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24 po[j*m + m - 1 - i] = pi[j*m + i];
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25 }