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Creating GrADS Output: Creating Postscript and GIF Files
Note: Commands that you enter are in red
type; messages from GrADS are in green
type.
Postscript Files
Use the gxps
command to convert GrADS output files to .ps files.
Run your GrADS script, making sure to enable
print _file in your GrADS script. (see example
script here) and print your image to that file (after drawing your
graph and all text, the command print
will print your graphic to the GrADS output file you enabled). After
you exit GrADs, at the UNIX command prompt type:
gxps -i name_of_GrADS_output_file -o
output_ps_file.ps
Some options you may add to this command are:
-i input GrADS meta file
-o output postscript file
-c color output (default is black and
white)
-r reverse background (typically black);
default is white background
-b border width in inches (default is
0.5)
-a create ps suitable for A4 printers
-d do NOT add ctrl-d to end of ps file
(added for some HP printers, generally ignored)
Example: to make a file with color output,
type:
gxps
-c -i input_file -o output_file.ps
Example: to make a file with color output
on a black background with a border with of 0.10 inches, type:
gxps
-b 0.10 -c -r -i input_file -o output_file.ps
To use a GrADS .ps file with graphics software (e.g., Canvas): Using
a text editor, edit the first line of the GrADS .ps file, changing it
from %! to %!PS-Adobe-3.0.
GIF Files
Use the gxgif command to
convert GrADS output to GIF files.
Run your GrADS script, making sure to enable
a print file (enable print name_of_GrADS_output_file)
and print your image to that file (after drawing your graph and all
text, the command print
will print your graphic to the GrADS output file you enabled). AFTER
you exit GrADS, at the unix command prompt type:
gxgif -i input_file -o output_file.gif
Some options you may add to this command are:
-i <in_file>[.gm]
-o <out_file> (default: basename(in_file).gif, '-'
= stdout)
-r Black background
-v Verbose
-x <pixels> # pixels horizontally
-y <pixels> # pixels vertically
Example: to make a .gif file with a black background and dimensions
of 200 x 200 pixels, type:
gxgif -x 200 -y 200 -r -i input_file -o output_file.gif
