How to shift axis?

[Michael Traub <mtraub@xxxxxxxxxxxxxxxxx>]

Hi Ferreters!

I want to visualize climatological data. In general, I know what to do.
Unfortunately, the data set starts at 0E (I=1) and ends at 2.5W (I=144).
But I would like to have a start at 20W (I=136 ??). How can I shift the axis that I=136 becomes I=1??? 
Michael


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Michael Traub
Max-Planck Institute for Chemistry
Department of Atmospheric Chemistry
P.O. Box 3060
55020 Mainz
Germany

phone: +49 6131 305-437
fax:   +49 6131 305-436
e-mail: mtraub@mpch-mainz.mpg.de