Re: I want to change the sort of attributes for a netCDF file

Adam,

I am curious about an alternate method of creating attributes. Does
the filevarattdef routine add attributes in *forward* order to a
file variable? This is a more complicated method to write a Netcdf
file than what you showed, but it may be worth noting for some
applications that use file predefinition.

   http://www.ncl.ucar.edu/Applications/method_2.shtml

Dave Allured
CU/CIRES Climate Diagnostics Center (CDC)
http://cires.colorado.edu/science/centers/cdc/
NOAA/ESRL/PSD, Climate Analysis Branch (CAB)
http://www.cdc.noaa.gov/psd1/

Adam Phillips wrote:
> Hi Ehsan,
> The order that the attributes are written is opposite to how they are
> shown in the netCDF file (or in the output of printVarSummary). For example:
>
> ncl 1> a = addfile("example.nc","c")
> ncl 2> var = (/1,2,3,4/)
> ncl 3> var!0 = "var"
> ncl 4> var&var = var
> ncl 5> var_at_att1 = "Attribute 1"
> ncl 6> var_at_att2 = "Attribute 2"
> ncl 7> var_at_att3 = "Attribute 3"
> ncl 8> a->var = var
> ncl 9> exit
>
> -/home/>ncdump -h example.nc | less
> netcdf what {
> dimensions:
> var = 4 ;
> variables:
> int var(var) ;
> var:att3 = "Attribute 3" ;
> var:att2 = "Attribute 2" ;
> var:att1 = "Attribute 1" ;
>
> I know of no quick way to alter the order of attributes in a netCDF
> file. The only ways I can think of are: by either editing it by hand in
> NCL (by using the "w" option of addfiles), or by using the ncatted
> netCDF operator and deleting and then recreating the attributes in the
> proper order.
> Adam
>
>
> Ehsan Khorsandi wrote:
>> Dear all,
>>
>> I maked a netCDF file and the attribute are in sort that I don't need,
>> they are like this:
>>
>> float ALD2(TSTEP, LAY, ROW, COL) ;
>> ALD2:var_desc = "Model species ALD2
>> " ;
>> ALD2:units = "moles/s " ;
>> ALD2:long_name = "ALD2 " ;
>>
>>
>> and want the attributes in this way:
>>
>>
>> float ALD2(TSTEP, LAY, ROW, COL) ;
>> ALD2:units = "moles/s " ;
>> ALD2:long_name = "ALD2 " ;
>> ALD2:var_desc = "Model species ALD2
>> " ;
>>
>>
>> I checked all way but there were no chance please see if you can help me to make attributes sorted as I need.
>>
>> Thanks,
>> Ehsan
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Received on Mon Mar 02 2009 - 12:19:03 MST