Hello -
If you have access to SAS/ETS software then you might want to have a look at the TIMESERIES procedure, which provides access to both autocorrelation and crosscorrelation features.
See:
http://support.sas.com/documentation/cdl/en/etsug/63939/HTML/default/viewer.htm#etsug_timeseries_sec...
http://support.sas.com/documentation/cdl/en/etsug/63939/HTML/default/viewer.htm#etsug_timeseries_sec...
Example (autocorrelation):
data monthly;
set monthlydata_sas7;
sasdate=input(put(month,z6.),yymmn6.);
drop month;
format sasdate date9.;
run;
proc timeseries data=monthly out=_null_ outcorr=outcorr;
id sasdate interval=month;
var sprd;
corr / nlag=12;
run;
proc print noobs data=outcorr;
run;
Thanks,
Udo