Set no data (null) value in geostatistical wizard?

Discussion created by abby_frazier on Jul 19, 2011
Latest reply on Dec 2, 2011 by slynch-esristaff

I am working with monthly climate data and need to use ordinary kriging.  I have just upgraded from 9.3.1 to version 10, and aside from the many exciting changes, I cannot seem to find a way to set my null value in my data.  I know 9.3.1 had this option (set no data value = -9999), but version 10 tries to use my -9999s as regular values.  I create my tables in excel, then import them into Arc and create shapefiles which I use to Krige the different columns representing months.  When I tried replacing -9999s with blanks in excel, Arc converted them to 0s (same when I tried using NaNs). 

Is the "set no data value" option gone in version 10 (or just hiding)?  Any suggestions for a work around?  Other than creating new files for every single month where I eliminate the null points myself?  Thanks!