[ferret_users] Reading ascii files

[Luiz Paulo <lassad@xxxxxxxxxxx>]

Hi all,

I have a two dimensional one variable ascii file (matrix called 
vel_amp1.dat). The file has the following dimensions (901 lines x  1081 
columns). Following manual I did the following

*************************************
DEFINE AXIS/X=1:1081:1 xlon
DEFINE AXIS/Y=1:901:1 ylat
DEFINE GRID/X=xlon/Y=ylat vel_amp
FILE/VAR=height/GRID=vel_amp vel_amp1.dat
**********************************************

When I execute the show data command I got the following:

*************************************************************************
 currently SET data sets:
    1> .\vel_amp1.dat  (default)
 name     title                             I            J         K         L
 HEIGHT   HEIGHT                1:1081    1:901     ...       ...
**************************************************************************
When tried to contour the height variable I've got the following error message:

CONTOUR height

**********************************************************************************
yes? contour height
 **ERROR: dimensions improperly specified: must be a 2D region
          contour height
***********************************************************************************

What am I doing wrong?

Thanks for the help,

Luiz