Re: [ferret_users] list problem

[Jaison Kurian <jaison@xxxxxxxxxxxxxxxxxx>]

Hi Jonathan,
              Ferret too have limitations (Please have a look at Ferret user 
manual, Ch4 Sec4.  FERRET PROGRAM LIMITS)! The command line cannot grow beyond
a certain length, the limits being different in different situations. Just 
change the listing procedure slightly, you will get it done! Few methods are 
given below.

     use ncep_1996_lh.nc 
     ......
     ncep_1996_v10m.nc

     cancel list/head
     set list/format=(1X,18F14.6)

     set reg/x=-85.5:-90.5/y=37.5:42.5

     sp rm -f ncep.dat
     list/file=ncep.dat air[x=@AVE,y=@AVE,d=14],dswrf[x=@AVE,y=@AVE,d=5],...
               ........................

If you want to reduce the command line length further, use a symbol to 
specify the averaging operation like;

     define symbol av = x=@AVE,y=@AVE

     sp rm -f ncep.dat
     list/file=ncep.dat air[($av),d=14],dswrf[($av),d=5],...

The above symbol can also take the form (if there is no explicit "set reg"
command, and with variables lon_s, lon_f, lat_s & lat_f defined)

     define symbol av = x=`lon_s`:`lon_f`@ave,y=`lat_s`:`lat_f`@ave

  
Insights......
--------------

 If you don't have any immediate mode evaluation (grave accents ``) along with
variable names, the list command can grow up to 2048 character length. With,
immediate mode evaluation, the variables in this category cannot occupy more
than ~690 character length. This numbers again depends on the list format and
other similar things (i guess so...).

Please let me know if you have any questions.

Jaison



On Thu, 6 Sep 2007, Jonathan Winter wrote:

> I'm trying to write out a file of values.  I pasted the output of my
> commands below.  If I don't include the variable "pres", which means I'm
> only outputting 12 variables (columns), it works fine.  Any idea why
> this is or what I can do to write all 18 variables to the same file?
> Thanks in advance for the help.
> 
> jonathan
> 
> yes? go ncep_aggr.jnl
> !cancel mode/verify
> cancel list/head
> let lon_s = -85.5
> let lon_f = -90.5
> let lat_s = 37.5
> let lat_f = 42.5
> 
> use ncep_1996_lh.nc    !#1
> use ncep_1996_lwd.nc   !#2
> use ncep_1996_lwu.nc   !#3
> use ncep_1996_psrf.nc  !#4
> use ncep_1996_qa.nc    !#5
> use ncep_1996_ro.nc    !#6
> use ncep_1996_rsw.nc   !#7
> use ncep_1996_rt.nc    !#8
> use ncep_1996_sh.nc    !#9
> use ncep_1996_solin.nc !#10
> use ncep_1996_ssw.nc   !#11
> use ncep_1996_swi.nc   !#12
> use ncep_1996_swu.nc   !#13
> use ncep_1996_ta.nc    !#14
> use ncep_1996_tauu.nc  !#15
> use ncep_1996_tauv.nc  !#16
> use ncep_1996_u10m.nc  !#17
> use ncep_1996_v10m.nc  !#18
> 
> set list/format=(1X,18F14.6)
> list/file=ncep.dat/width=50 air
> [x=`lon_s`:`lon_f`@ave,y=`lat_s`:`lat_f`@ave,d=14], shum
> [x=`lon_s`:`lon_f`@ave,y=`lat_s`:`lat_f`@ave,d=5], dswrf
> [x=`lon_s`:`lon_f`@ave,y=`lat_s`:`lat_f`@ave,d=12], uswrf
> [x=`lon_s`:`lon_f`@ave,y=`lat_s`:`lat_f`@ave,d=13], lhtfl
> [x=`lon_s`:`lon_f`@ave,y=`lat_s`:`lat_f`@ave,d=1], shtfl
> [x=`lon_s`:`lon_f`@ave,y=`lat_s`:`lat_f`@ave,d=9], ulwrf
> [x=`lon_s`:`lon_f`@ave,y=`lat_s`:`lat_f`@ave,d=3], dlwrf
> [x=`lon_s`:`lon_f`@ave,y=`lat_s`:`lat_f`@ave,d=2], prate
> [x=`lon_s`:`lon_f`@ave,y=`lat_s`:`lat_f`@ave,d=8], runof
> [x=`lon_s`:`lon_f`@ave,y=`lat_s`:`lat_f`@ave,d=6], uwnd
> [x=`lon_s`:`lon_f`@ave,y=`lat_s`:`lat_f`@ave,d=17], vwnd
> [x=`lon_s`:`lon_f`@ave,y=`lat_s`:`lat_f`@ave,d=18], pres
> [x=`lon_s`:`lon_f`@ave,y=`lat_s`:`lat_f`@ave,d=4]
>  **ERROR: command syntax: Recursive aliases or GO argument definitions
> list/file=ncep.dat/width=50 air[x=-85.5:-90.5@ave,y=37.5:42.5@ave,d=14],
> shum[x=-85.5:-90.5@ave,y=37.5:42.5@ave,d=5], dswrf
> [x=-85.5:-90.5@ave,y=37.5:42.5@ave,d=12], uswrf
> [x=-85.5:-90.5@ave,y=37.5:42.5@ave,d=13], lhtfl
> [x=-85.5:-90.5@ave,y=37.5:42.5@ave,d=1], shtfl
> [x=-85.5:-90.5@ave,y=37.5:42.5@ave,d=9], ulwrf
> [x=-85.5:-90.5@ave,y=37.5:42.5@ave,d=3], dlwrf
> [x=-85.5:-90.5@ave,y=37.5:42.5@ave,d=2], prate
> [x=-85.5:-90.5@ave,y=37.5:42.5@ave,d=8], runof
> [x=-85.5:-90.5@ave,y=37.5:42.5@ave,d=6], uwnd
> [x=-85.5:-90.5@ave,y=37.5:42.5@ave,d=17], vwnd
> [x=-85.5:-90.5@ave,y=37.5:42.5@ave,d=18], pres
> [x=-85.5:-90.5@ave,y=`lat_s`:`lat_f`@ave,d=4]
> 
> 
> 

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