Re: [ferret_users] 3 bad/missing values

[Ingo Bethke <Ingo.Bethke@xxxxxxxxxxxxxx>]

Hi Ben,

You can use Ferret's if-then logic to define a new variable which has 
only one missing value, e.g.

let /title=`my_var, return=title` /units=`my_var, return=units` 
/bad=-9999 my_var2=if (my_var eq 0 or my_var eq -32768) then -9999 else 
my_var

Cheers, Ingo



Ben Burford wrote:

> Hi,
>
> I have data with 3 different bad/missing data values (i.e. 0, -9999, -32768)
>  
> My (LAS) system gets the data from a server as binary values and uses Ferret
> to write the data into a netcdf file, with one of the three values declared
> in the netcdf file as a missing data value.
>
> A script then directs Ferret to read the netcdf file and plot the data.  Whe
> n all three missing values are present in the data then the plot is obviousl
> y very strange and the color bar shows a range of (e.g.) 0 to -9999 or 0 to 
> -32768.
>
> Is there any way to handle this situation with 3 bad/missing data values?
>
> A big thank you for any help you can give.
>
> Ben
>
>
>
>