Re: [ferret_users] Re: return=tstart,p=1

[David Wang <climater@xxxxxxxxx>]

Hi,

Thank Ansley's workaround and explanation, as well as Andrew's history lesson. I later found yet another trick as the following:

> let tstart = 0`temp,return=tstart,p=1`

which avoids null string meanwhile doesn't affect those larger than 0001 (e.g., 01985 == 1985).

Thanks,
D.

On Mon, Feb 25, 2008 at 5:07 PM, Andrew Wittenberg <Andrew.Wittenberg@xxxxxxxx> wrote:

Hi David,

I reported this same issue four years ago (Ansley -- it's bug #762).
Years 0000 and 0001 appear to be dropped from the display, probably in
connection with logic that in some cases is used to interpret these two
years as "climatological".  Ansley's workaround should get you back on
track.  (It would be nice to get the issue fixed, though.)

Andrew

On Mon, 25 Feb 2008, David Wang wrote:

> Hi,
>
> The starting year is actually 1, not 0. I was mistaken. But the problem
> persists. I wonder why Ferret drops off 0001 in time axis strings.
>
> yes? show g/l=1:24 temp
>>     GRID GJG1
>>  name       axis              # pts   start                end
>>  LON       LONGITUDE            1mr   0E                   0E
>>  LAT       LATITUDE             1 r   0                    0
>>  DEPTH     DEPTH (m)            1 r-  5                    5
>>  TIME      TIME              6000 i   16-JAN 12:00         16-DEC-0500
>> 12:00
>>
>>        L     T                   TBOX      TBOXLO                TSTEP
>> (days)
>>        1>  16-JAN 12:00:00       29.5      01-JAN 18:00:00         15.5
>>        2>  15-FEB 00:00:00       29.5      31-JAN 06:00:00         45
>>        3>  16-MAR 12:00:00       30        01-MAR 18:00:00         74.5
>>        4>  16-APR 00:00:00       30.5      31-MAR 18:00:00         105
>>        5>  16-MAY 12:00:00       30.5      01-MAY 06:00:00         135.5
>>        6>  16-JUN 00:00:00       30.5      31-MAY 18:00:00         166
>>        7>  16-JUL 12:00:00       30.75     01-JUL 06:00:00         196.5
>>        8>  16-AUG 12:00:00       30.75     01-AUG 00:00:00         227.5
>>        9>  16-SEP 00:00:00       30.5      31-AUG 18:00:00         258
>>       10>  16-OCT 12:00:00       30.5      01-OCT 06:00:00         288.5
>>       11>  16-NOV 00:00:00       30.5      31-OCT 18:00:00         319
>>       12>  16-DEC 12:00:00       30.75     01-DEC 06:00:00         349.5
>>       13>  16-JAN-0002 12:00:00  30.25     01-JAN-0002 00:00:00    380.5
>>       14>  15-FEB-0002 00:00:00  29.5      31-JAN-0002 06:00:00    410
>>       15>  16-MAR-0002 12:00:00  30        01-MAR-0002 18:00:00    439.5
>>       16>  16-APR-0002 00:00:00  30.5      31-MAR-0002 18:00:00    470
>>       17>  16-MAY-0002 12:00:00  30.5      01-MAY-0002 06:00:00    500.5
>>       18>  16-JUN-0002 00:00:00  30.5      31-MAY-0002 18:00:00    531
>>       19>  16-JUL-0002 12:00:00  30.75     01-JUL-0002 06:00:00    561.5
>>       20>  16-AUG-0002 12:00:00  30.75     01-AUG-0002 00:00:00    592.5
>>       21>  16-SEP-0002 00:00:00  30.5      31-AUG-0002 18:00:00    623
>>       22>  16-OCT-0002 12:00:00  30.5      01-OCT-0002 06:00:00    653.5
>>       23>  16-NOV-0002 00:00:00  30.5      31-OCT-0002 18:00:00    684
>>       24>  16-DEC-0002 12:00:00  30.75     01-DEC-0002 06:00:00    714.5
>>
>>
>
> D.
>
> On Mon, Feb 25, 2008 at 1:18 PM, David Wang <climater@xxxxxxxxx> wrote:
>
>> Hello Ferreters,
>>
>> I'm using `var,return=tstart,p=1` to return the starting year and likewise
>> the ending year. However when the starting year is 0, the command returns
>> nothing (a null string) which causes troubles when I'd like to assign the
>> value to other variables/symbols. My intention is to calculate multi-year
>> means and variances from monthly data by the approach described here at
>> http://ferret.pmel.noaa.gov/FERRET_17sep07/FAQ/analysis/annual_from_monthly.html
>> I need the starting and the ending years of the original time axis to
>> define a new time axis. Any clues?
>>
>> yes? say `temp,return=tstart`
>>>  !-> MESSAGE/CONTINUE 16-JAN 12:00
>>> 16-JAN 12:00
>>>
>>> yes? say `temp,return=tstart,p=1`
>>>  !-> MESSAGE/CONTINUE
>>
>>
>>
>> Thanks very much,
>> David
>>
>>
>