free grads

outxwd

This command dumps the contents of the graphics window to a file. The output file is in XWD (X Windows Dump) format. The syntax is:   

open

open filename

Opens filename, which should be the name of a grads data descriptor file, also called a control file. 

Expression Evaluation Using "offt" Dimension Override

Motivation
Syntax
A Diagonal Slice
A Time-Varying Diagonal Slice
Applying a Function Over a Time-Varying Diagonal Slice

()oacres

oacres (gexpr, sexpr <,radii>)

A Cressman objective analysis is performed on the station data to arrive at a gridded result that represents the station data.   

()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.