📄 corr_c.mht
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Date: Wed, 27 Sep 2006 22:49:38 +0800
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<BODY><PRE>/* corr.c - sample cross correlation of two length-N signals =
*/
void corr(N, x, y, M, R) /* computes \(R[k]\), \(k =3D =
0, 1,\dotsc, M\) */
double *x, *y, *R; /* \(x,y\) are =
\(N\)-dimensional */
int N, M; /* \(R\) is =
\((M+1)\)-dimensional */
{
int k, n;
for (k=3D0; k<=3DM; k++)
for (R[k]=3D0, n=3D0; n<N-k; n++)
R[k] +=3D x[n+k] * y[n] / N;
}
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