free grads

()oabin

oabin (gexpr, sexpr <,-flag>)

This function bins station observations into grid cells based on their location. If more than one station is located within a grid box, the observations are averaged together to produce the analyzed value.  

gexpr   a valid grid expression
sexpr   a valid station data expression

The optional flag may be one of the following:

-f      set the value to the first observation that gets binned
-c      output is the # of stations located within each grid cell

Usage Notes

1. The -f flag should be used when summing is not appropriate -- e.g. surface type classification.

   
   

2. See the related function oacres.

Example

	open grd_var.ctl

open stn_var.ctl

	set gxout grfill



	d oabin(grd_var.1,stn_var.2)

set gxout grid

	d oabin(grd_var.1,stn_var.2,-c)