Re: Problem with redefining the axis

[Niki Gruber <gruber@xxxxxxxxxxxxxxxxxxxx>]

Dear Min,

> What i want to do is to replace temperature values
> in original Z axis of the netcdf data file with those on 
> new depth axis. 
> 
> That is, an original data file has
> depth   temp
>    20       25
>    40       24
>    60       23
>    80       22
>   100       21
> 
> I expect to replace the above into
>   depth   temp
>    10         25
>    30         24
>    50         23
>    70         22
>    90         21
> 
> Therefore, I have done follwing 
> yes? let lev={10.00,30.00,50.00,70.00,90.0]
> yes? define axis/from_data/depth/Z/name=nlev/units=meters lev
> yes? plot temp[gz=nlev]
> 
> Unfornately,
> my problem is that new defined "temp[gz=nlev]" displays  
> the interpolated values of the original data on new z axis 
> which may be related to dynamic axis.  
> yes? list temp[gz=nlev]
>    depth    temp
>      10         ....
>      30        24.5
>      50        23.5
>      70        22.5
>      90        21.5
> 
> I want to change only z depth axis to new axis with 
> data keeping.
> I am really appreciated of any comments on how to solve my problem....
> 
> Thank for  your help in advance.
> Duke Min   
> 


> yes? plot temp[gz=nlev]

The default regridding scheme is interpolation is @lin. I suggest to use
@asn, i.e.

plot temp[gz=nlev@asn]

see the online user guide 
http://ferret.wrc.noaa.gov/Ferret/Documentation/Users_Guide/v50_2000/Chapter4.htm#_VPID_117

for further info.

-- regards, Niki