free grads

draw wxsym

draw wxsym symbol x y size <color <thickness>>

Draws the specified wx symbol at the specified location. where:

set wxopt

set wxopt wxsym|mark|char

Controls output when using graphics output option set gxout wxsym. The options are as follows: 

set wxcols

set wxcols c1 c2 c3 c4 c5

where c1...c5 are the weather symbol colors 

Widgets

grads has the capability to implement a graphical user interface. This interface is used to draw widgets (buttons and pull down menus) that allow a "point and click" interface between the grads user and the scripting language. (N.B. The widgets have been temporarily disabled for version 2.1.a1)  

wi

N.B.: This command was deprecated long ago and is not included in grads version 1.9 or later.

The wi (write image) command dumps an exact copy of the contents of the grads graphics screen directly to an image file. This feature is implemented by means of an interface to the ImageMagick library. The syntax is:    

set warn

set warn on|off

Turns on/off the messages grads sends to the terminal that report on the progress of certain mathematical operations. Default is "on"; turn "off" to suppress messages.   

query

The query command allows the user to get information about a variety of aspects of the current grads session. Configuration, plot characteristics, graphics specifics, and file structure are some examples. The use of query pos combined with the coordinate transformations is the basis of many interactive applications with buttons and drop menus. The query command may be shortened to simply q. The syntax is:  

query

The query command allows the user to get information about a variety of aspects of the current grads session. Configuration, plot characteristics, graphics specifics, and file structure are some examples. The use of query pos combined with the coordinate transformations is the basis of many interactive applications with buttons and drop menus. The query command may be shortened to simply q. The syntax is: