Hello, all:
I'm trying to use proc variogram to study spatial correlation in a variable (present2012). The difficulty is that the range class 0 and 2 through 50 make sense. The range class 1, however, is not representative, for some reasons I won't go into here. I know how to condition the variogram estimate on the lags from 2 to 50:
proc variogram data=summarizedbycentroid plots=all;
store out=storedmodel / label='WNV cases';
compute lagd=.001 maxlag=50;
coord xc=x yc=y;
model form=exp rangelag=2 to 50;
var present2012;
run;
but I can't figure out how to do something similar for (0, 2:50). I've tried everything, but I'm pretty sure it's not supported. Is there some way I can run the variogram, save the pairs, delete those in class 1, then run the variogram with this modified set? Etc.
Thanks for any insights,
JD
How about :
compute lagdistance=2 maxlags=25;
model form=exp;
The implied LAGTOLERANCE would be 1. You could make it less if you wanted to exclude lag=1 pairs.
PG
It's finally time to hack! Remember to visit the SAS Hacker's Hub regularly for news and updates.
Learn how use the CAT functions in SAS to join values from multiple variables into a single value.
Find more tutorials on the SAS Users YouTube channel.
Ready to level-up your skills? Choose your own adventure.