This command provides a way for station data profiles and time series to be saved in memory as a set. The command format is:

where cnum is the collection number, a value from 0 to 31, and expr is any GrADS expression that gives a station data result. If "free" is given for expr, the collection is emptied and all storage is freed.

Usage Notes

  1. The collect command will only work when one dimension is varying, either Z or T. Each time collect is issued for a particular collection number, the station data is added to the collection of stations. The order in which stations are added is important.

  2. After a group of station profiles or time series have been saved as a collection, use the coll2gr function to convert the collection into a grid.

  3. See the section of the User's Guide on Arbitrary Cross Sections for more information.