doc: Periodic grammarcheck of documentation. * doc/interpreter/basics.txi, doc/interpreter/expr.txi, doc/interpreter/install.txi, doc/interpreter/java.txi, doc/interpreter/plot.txi, doc/interpreter/sparse.txi, doc/interpreter/vectorize.txi, libinterp/corefcn/cellfun.cc, libinterp/corefcn/debug.cc, libinterp/corefcn/file-io.cc, libinterp/corefcn/load-save.cc, libinterp/corefcn/matrix_type.cc, libinterp/corefcn/pr-output.cc, libinterp/parse-tree/oct-parse.in.yy, liboctave/numeric/LSODE-opts.in, scripts/image/imformats.m, scripts/image/imread.m, scripts/image/imwrite.m, scripts/miscellaneous/error_ids.m, scripts/miscellaneous/fileattrib.m, scripts/miscellaneous/mex.m, scripts/miscellaneous/mkoctfile.m, scripts/miscellaneous/warning_ids.m, scripts/prefs/prefdir.m, scripts/prefs/preferences.m, scripts/signal/fftfilt.m, scripts/strings/isstrprop.m, scripts/testfun/assert.m: Periodic grammarcheck of documentation.

#include "mex.h"

void
mexFunction (int nlhs, mxArray* plhs[],
             int nrhs, const mxArray* prhs[])
{
  mwSize n;
  mwIndex i;
  double *vri, *vro;
  
  if (nrhs != 1 || ! mxIsNumeric (prhs[0]))
    mexErrMsgTxt ("ARG1 must be a 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];
    }
}