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I've used big topographic data sets from ascii values. When the axis is very long, ferret gets the spacing wrong due to rounding error. You can get around this for evenly spaced axes by using the npoints parameter. Try something like this define axis/x=1:100000/npoints=100000 my_axis to get an even axis 100,000 points long. ------------------------------------------------------------------------------------------ Edward D. (Ned) Cokelet, Ph.D. Oceanographer NOAA/PMEL off: (206) 526-6820 7600 Sand Point Way NE fax: (206) 526-6485 Seattle, WA 98115-6349 The contents of this message are mine personally and do not necessarily reflect any position of the Government or the National Oceanic and Atmospheric Administration. |