cross - E. A. Robinson’s subroutine to perform cross correlation
call cross(lx, x, ly, y, lg, g)
Basic Seismic
Utilities (BSU) subroutine originally published by Robinson
(1967) which cross correlates signals x and y to produce g.
The left (negative time) side of the cross correlation
results when one reverses the order of x and y in the call.
Fortran Version.
Arguments
lx (int)
Number of
samples in signal x
x (float)
Signal to cross correlate
ly (int)
Number of
samples in signal y
y (float)
Signal to cross correlate
lg (int)
Number of
samples in signal g
g (float)
Resultant cross correlation of signal x with y.
NOTE:
Cross calls subroutine dot which computes an
inner-product.
dot(3), fold(3), eureka(3), shape(3)
Robinson, E.A.,
1967, "Multichannel Time Series Analysis
with Digital Computer Programs", Holden-Day, 298p.
No known bugs.
Copyright © 1967 by Holden-Day Inc.
Holden-Day Inc., Liquidation Trust, 1259 S.W. 14th Street Boca Raton, FL 33486 Phone: 561.750.9229 Fax: 561.394.6809
This subroutine is included for distribution with Basic Seismic Utilities (BSU) by joint permission of the author, Enders Robinson, and Holden-Day Inc. Liquidation Trust, Frederick H. Murphy, Trustee. Being part of the BSU package, it is governed by the terms of the GPL license, and is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
E. A. Robinson