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Problem
You downloaded data from the ECMWF data server or another ECMWF repository in NetCDF format.
Then you are trying to read the data with the NCAR Command Language (NCL) , GrADS or Ferret, but get an error message, for example for NCL:
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ncl 0> f = addfile("ECMWF-data.nc","r") ncl 1> print (getfilevarnames (f)) (0) longitude (1) latitude (2) time (3) p83.162 (4) p86.162 q ncl 3> x = f->p83.162 fatal:syntax error: line 3 before or near .162 x = f->p83.162 -------------^ ncl 4> x = f->"p83.162" fatal:syntax error: line 4 before or near > x = f-> ------^ |
Cause
NCL, GrADS and Ferret do not support dots in variable names.
Solution for NCL
Please enclose Enclose the parameter variable name in double quotes and Dollar signs and double quotes:
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ncl 0> f = addfile("ECMWF-data.nc","r") ncl 1> print (getfilevarnames (f)) (0) longitude (1) latitude (2) time (3) p83.162 (4) p86.162 q ncl 2> x = f->$"p83.162"$ ncl 3> print (x) Variable: x Type: short Total Size: 7172160 bytes 3586080 values Number of Dimensions: 3 Dimensions and sizes: [time | 31] x [latitude | 241] x [longitude | 480] Coordinates: time: [1024872..1025592] latitude: [90..-90] longitude: [ 0..359.25] Number Of Attributes: 6 scale_factor : 0.6170104064936749 add_offset : -3072.290927078247 _FillValue : -32767 missing_value : -32767 units : W m**-2 long_name : Vertical integral of divergence of thermal energy flux |
Related articles
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Workaround
Rename the variable so the name contains only allowed character:
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