Re: [ferret_users] how to modify axis attributes

[P S Swathi <swathi@xxxxxxxxxxxxxxx>]

On Tue, 20 Feb 2007, Martin Schmidt wrote:
Dear Martin,

Why not simply use ncatted from nco on the original file?

Swathi


> Hi ferreters,
> I am trying to modify the attributes of axes and cannot get it working.
> 
> To demonstrate the problem consider the following short script:
> 
> ____
> 
> use monthly_navy_winds.cdf
> 
> let t2 =2*UWND
> SET ATT/OUTPUT  (`t2,return=xaxis`).point_spacing = "uneven"
> save/clobber/file=dummy.nc/l=1 t2
> 
> ____
> 
> The x-axis of uwnd has the attribute
>                 FNOCX:point_spacing = "even" ;
> 
> I would like to have it changed to uneven, whatever the reason is ...
>                 
> After setting the attribute ferret answers 
> !-> SET ATT/OUTPUT  (FNOCX).point_spacing = "uneven"
> 
> Fine. However, after saving and inspecting the outputfile with ncdump,
> one finds
>                 FNOCX:point_spacing = "even" ;
> 
> What happens here?
> 
> Another question to the same problem:
> 
> How to define a new axis attribute?
> DEFINE ATT/OUTPUT  (`t2,return=xaxis`).new_att = "somthing"
> 
> produces the answer
>  !-> DEFINE ATT/OUTPUT  (FNOCX).new_att = "somthing"
> but nothing is in the output?
> 
> Greetings,
> Martin 
>