Re: [ferret_users] Ferret list command help

Here's a complete example:

yes? use monthly_navy_winds

yes? show func tax_datestring

TAX_DATESTRING(A,B,C)

Returns date string for time axis coordinate values

A: time steps to convert

B: variable with reference time axis

C: output precision (STRING)

yes? let tt = t[gt=uwnd]

yes? let date_strings = tax_datestring(tt, tt, "hour")

yes? list/norowheader date_strings

VARIABLE : TAX_DATESTRING(TT, TT, "hour")

FILENAME : monthly_navy_winds.cdf

FILEPATH : /home/users/tmap/ferret/linux/fer_dsets/data/

SUBSET : 132 points (TIME)

"16-JAN-1982 20"

"16-FEB-1982 06"

"18-MAR-1982 17"

"18-APR-1982 03"

"18-MAY-1982 14"

"18-JUN-1982 00"

"18-JUL-1982 11"

"17-AUG-1982 21"

"17-SEP-1982 08"

"17-OCT-1982 18"

"17-NOV-1982 05"

"17-DEC-1982 15"

"17-JAN-1983 02"

"16-FEB-1983 12"

"18-MAR-1983 23"

...

On Thu, Jan 9, 2014 at 9:46 AM, Don DNA <don_vbe@xxxxxxxxx> wrote:

Thank you

will tell me how can I extract only date string , I am getting o/p like this

yes? use Ascat_Wind_2007_13_1_regridded.nc
yes? list/l=1:10 t[g=u]
             VARIABLE : T
                        axis TIME
             FILENAME : Ascat_Wind_2007_13_1_regridded.nc
             SUBSET   : 10 points (TIME)
05-JAN-2006 00 / 1: 75244.
12-JAN-2006 00 / 2: 75251.
19-JAN-2006 00 / 3: 75258.
26-JAN-2006 00 / 4: 75265.
02-FEB-2006 00 / 5: 75272.
09-FEB-2006 00 / 6: 75279.
16-FEB-2006 00 / 7: 75286.
23-FEB-2006 00 / 8: 75293.
02-MAR-2006 00 / 9: 75300.
09-MAR-2006 00 / 10: 75307.

I want only
05-JAN-2006 00
12-JAN-2006 00
19-JAN-2006 00
.......
.......
09-MAR-2006 00

Please Ansley help me, I am newbie

Dona

On Thursday, January 9, 2014 6:50 PM, Don DNA <don_vbe@xxxxxxxxx> wrote:

Sorry for late reply, I want to save datestring in array say

let dates = t[g=variable] something like this, but it stores numeric values, my final aim is to list like this

list/noheader/norow date_string_only,latitude,longitude,some_variable

whether this will be possible ? I searched in userlist I could not find it.

Dona Clara

On Monday, January 6, 2014 10:41 PM, Steve Hankin <steven.c.hankin@xxxxxxxx> wrote:

Assuming I am understanding your question ....

Use SHOW AXIS or SHOW GRID to most simply look just at axis values. Use a grave accent _expression_ with RETURN= to captuare a particular string, like the date. The LIST command is intended to show data values. It lists the "23375" because it is the numerical value that underlies your "T" pseudo-variable (the way in which time is encoded in this axis).

    - Steve

On 1/5/2014 4:13 AM, Don DNA wrote:

Hi All I am working with some data

I defined time axis like this

DEFINE AXIS/T/T0="1-JAN-1950:12:00"/UNITS=days myday=juld

yes? list t[gt=myday]
             VARIABLE : T
                        axis TDAY
             TIME     : 31-DEC-2013 06:06
          23375.

Here I want to list only TIME that is 31-DEC-2013 06:06 not 23375

and I am wondering how 23375 is listed with time 06:06 ???

Please someone help me