Re: [ferret_users] problem in reading .mc files.

[yangxing zheng <yangxingz@xxxxxxxxx>]

Hi,

     Thank you for kind help. Ansley, I try your way,
using
repeat/l=1:22 shade temp
it stops at l=21. It can not plot temp, however, if I
plot u first,
yes?shade u
then I plot temp at l=21 again,
yes?shade temp
it works! It is really surpring to me about ferret
working.
P.S.: I using the individual cdf file (l=21), it has
no problem to plot temp

The following is what I try:
yes? set region/k=1/x=110w:100w/x=10s:0
yes? repeat/l=1:22 shade temp
.........
!-> REPEAT: L=15
!-> REPEAT: L=16
!-> REPEAT: L=17
!-> REPEAT: L=18
!-> REPEAT: L=19
!-> REPEAT: L=20
!-> REPEAT: L=21
 ** netCDF error: Variable not found
shade temp
Command file, command group, or REPEAT execution
aborted
yes? set region/l=21
yes? shade temp
 ** netCDF error: Variable not found
yes? shade u
yes? shade temp
......

------------------
Do you think it is a bug for ferret v5.70 Mac OS?
--- Ansley Manke <Ansley.B.Manke@xxxxxxxx> wrote:

> Hi Yangxing,
> Accessing data in Ferret occurs in several stages.
> The command
> 
>     yes? set data test.mc
> 
> reads the .mc file to see what's in there, and it
> uses that information 
> to create the time axis. Then the first file is
> opened, and information 
> about the other axes and the variables is stored
> from what's in that 
> file. This is all that has happened at the point
> where you do a SHOW 
> DATA command. The other stepfiles are opened and
> read only when data 
> from them is required by the other commands - plot,
> shade, load, or 
> other commands that produce an output.
> 
> I wonder if one of the step files is missing the
> variable TEMP.  Since 
> you're seeing the error in the first 100 time steps,
> you could try:
> 
>     yes? cancel region
>     yes? repeat/L=1:100
> (shade/x=110w:80w/y=10s:10n/k=1 temp)
> 
> And see if you hit an error message.
> 
> 
> yangxing zheng wrote:
> > Thank all of you for prompt response. Now I
> include
> > the .mc file to diagnose what the problem is.
> > --- Roman Tonkonojenkov <romantonk@xxxxxxx> wrote:
> >
> >   
> >> Hi Yangxing,
> >>
> >> Maybe a stupid remark, but I had similar problems
> in
> >> the past and 
> >> at least in one instance I was using the wrong
> case
> >> (i.e. the variable was
> >> TEMP instead of temp). I don't think it is the
> issue
> >> with you,
> >> but at least try it 
> >> Cheers,
> >> Roman
> >>
> >> On Tue, Nov 13, 2007 06:39 PM, yangxing zheng
> >> <yangxingz@xxxxxxxxx> wrote:
> >>     
> >> I have a problem about reading mc file from
> ferret.
> >>     
> >>> The following is an example. The files are
> there.
> >>>       
> >> We
> >>     
> >>> show data/variables, the variable temp exists.
> If I
> >>> make a plot by seting an individual l (set
> >>> region/l=11), it works. But if I want to plot
> time
> >>> series of temp, it says: ** netCDF error:
> Variable
> >>>       
> >> not
> >>     
> >>> found.
> >>>    But variable temp is obvious there. Also if I
> >>>       
> >> plot
> >>     
> >>> a time series of u and v (the grid is identical
> to
> >>> temp), it does work! Do you think what the major
> >>> problem is? I attached the .mc file to you as a
> >>> reference.
> >>>
> >>>       [mac35:yzheng/HYCOM/Pacific] yzheng%
> ferret
> >>>        NOAA/PMEL TMAP
> >>>        FERRET v5.70 (alpha)
> >>>        Mac OS X 10.3.4 - 10/08/04
> >>>        13-Nov-07 16:08    
> >>>
> >>> yes? set data test.mc
> >>> yes? show data/variables
> >>>     currently SET data sets:
> >>>    1> ./test.mc  (default)
> >>>     HYCOM-NCODA Assimilation Run NOGAPS
> >>> name     title                             I    
>  
> >>>       
> >>  
> >>     
> >>> J         K         L
> >>> U        Zonal Velocity                   1:1376
>  
> >>>       
> >>> 1:937     1:19      1:425
> >>>             cm/s on grid GFP1 with -9999 for
> >>>       
> >> missing
> >>     
> >>> data
> >>>             X=180E:70W  Y=35.1S:35.1N  Z=-5:1050
> 
> >>> V        Meridional Velocity              1:1376
>  
> >>>       
> >>> 1:937     1:19      1:425
> >>>             cm/s on grid GFP1 with -9999 for
> >>>       
> >> missing
> >>     
> >>> data
> >>>             X=180E:70W  Y=35.1S:35.1N  Z=-5:1050
> 
> >>> TEMP     Temperature                      1:1376
>  
> >>>       
> >>> 1:937     1:19      1:425
> >>>             DegC on grid GFP1 with -9999 for
> >>>       
> >> missing
> >>     
> >>> data
> >>>             X=180E:70W  Y=35.1S:35.1N  Z=-5:1050
> 
> >>>
> >>>  time range: 03-NOV-2003 00:00 to 31-DEC-2004
> >>>       
> >> 00:00
> >>     
> >>> yes? set region/l=12
> >>> yes? yes? set region/x=110w:80w/y=10s:10n/k=1
> >>> yes? yes? fill temp
> >>> yes? set region/l=1:100/i=100/j=700/k=1
> >>> yes? yes? plot temp
> >>> ** netCDF error: Variable not found
> >>> yes? plot u
> >>> yes? plot v
> >>>
> >>> ----------------------------
> >>>
> >>>
> >>>     
> >>>       
> >>
>
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> >>>
> >>>       
> >>     
> >
> >
> >      
>
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