10.3: Image created coarsely gridded data
This example reads gridded ascii station data (`Read Data '),
creates an interpolated image (`convert grid ... '), and then plots
the image.
There are some other useful tricks in this example, such as calling
`awk ' and `wc ' from the unix system.
(In the plot shown, all `query ' questions were answered with
carriage return, yielding the defaults; the `-p ' flag was specified
on execution, so the time stamp was not drawn.)
The command-file.
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