[ferret_users] define taxis

[yangxing zheng <yangxingz@xxxxxxxxx>]

Hi,

   Recently I met a problem in reading mc files. I
suspect my definition of Taxis different from the
model. My definition is just for some missing data for
some days. I compared the Taxis of model  with my
definition by using show axis/T MT (MT is the name for
taxis).

  the date 24-nov-2003 is available in the model,
yes? show axis/T MT
 name       axis              # pts   start           
    end
 MT        TIME                 1 i   24-NOV-2003
00:00    24-NOV-2003 00:00
T0 = 31-DEC-1900 00:00:00
   Axis span (to cell edges) = 1.5
 
       L     T                   TBOX      TBOXLO     
          TSTEP (days)
       1>  24-NOV-2003 00:00:00  1.5       23-NOV-2003
00:00:00    37583

  The date 23-NOV-2003 is missing in the model output,
I define it by myself.
define
axis/T="23-NOV-2003:00:00:00":"23-NOV-2003:00:00:00":1.5/units=days/t0="31-DEC-1900:00:00:00"
MT

yes? show axis/T MT
 name       axis              # pts   start           
    end
 MT        TIME                 1 r   23-NOV-2003
00:00    23-NOV-2003 00:00
T0 = 31-DEC-1900 00:00:00
   Axis span (to cell edges) = 1
 
       L     T                   TBOX      TBOXLO     
          TSTEP (DAYS)
       1>  23-NOV-2003 00:00:00  1         22-NOV-2003
12:00:00    37582


   Now let's look at the difference. There are two
major differences.

    difference 1: # pts   model defined: 1 i
                                        my definition:
1 r

    what is the meaning here i and r?

    Difference 2: Axis span (to cell edges) =1.5 from
model
                                                      
                  = 1 from my definition
      hence TBOX = 1.5 from model
                 TBOX = 1 from my definition

    if I use the command in ferret to return taxis
unit

     yes? say `salt,return=tunits`
  
    The message is days from model (days is lower
case)
                            is DAYS from my definion
(DAYS is upper case)

    Since I am not familiar with these details, how
can we unify the differences mentioned above? For
example, how can we define a Taxis that TBOX is 1.5
instead of 1


     Also, if we use show axis/all, 
     for # pts, i- appears, what is the difference
between i, i-, r?


     A lot of questions but say "thank you very much"


     Yangxing





      ____________________________________________________________________________________
Be a better friend, newshound, and 
know-it-all with Yahoo! Mobile.  Try it now.  http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ