[ferret_users] Time axis question

[Roman Tonkonojenkov <romantonk@xxxxxxx>]

Hi Ferreters,

I have a simple question about the t pseudo-variable. I
wasn't able to find exact answer in the documentation and I have trouble
understanding what it refers to [please see exaple file below]
I would be
thankful if someone could offer some
clarification...

Sincerely,
Roman



 define
axis/t=01-jan-1610:01-feb-1610:6/unit=day timaxis
yes? list
t[gt=timaxis]
             VARIABLE : T
                        axis TIMAXIS
             SUBSET   : 7 points (TIME)
 01-JAN-1610 00 / 1:  3653.
 07-JAN-1610 00 / 2:  3659.
 13-JAN-1610 00 / 3:  3665.
 19-JAN-1610 00 / 4:  3671.
 25-JAN-1610 00 / 5:  3677.
 31-JAN-1610 00 / 6:  3683.
 06-FEB-1610 00 / 7:  3689.

yes? define axis/t=01-jan-1600:01-feb-1600:6/unit=day timaxis
Replacing definition of axis TIMAXIS

yes? list t[gt=timaxis]
             VARIABLE : T
                &nb!
 sp;       axis TIMAXIS
             SUBSET   : 7 points (TIME)
 01-JAN-1600 00 / 1:   0.00
 07-JAN-1600 00 / 2:   6.00
 13-JAN-1600 00 / 3:  12.00
 19-JAN-1600 00 / 4:  18.00
 25-JAN-1600 00 / 5:  24.00
 31-JAN-1600 00 / 6:  30.00
 06-FEB-1600 00 / 7:  36.00

yes? define axis/t=01-jan-1900:01-feb-1900:6/unit=day timaxis
Replacing definition of axis TIMAXIS

yes? list t[gt=timaxis]
             VARIABLE : T
                        axis TIMAXIS
             SUBSET   : 7 points (TIME)
 01-JAN-1900 00 / 1:!
    0.00
 07-JAN-1900 00 / 2:   6.0!
 0
&nb
sp;13-JAN-1900 00 / 3:  12.00
 19-JAN-1900 00 / 4:  18.00
 25-JAN-1900 00 / 5:  24.00
 31-JAN-1900 00 / 6:  30.00
 06-FEB-1900 00 / 7:  36.00

yes? define axis/t=01-jan-1910:01-feb-1910:6/unit=day timaxis
Replacing definition of axis TIMAXIS

yes? list t[gt=timaxis]
             VARIABLE : T
                        axis TIMAXIS
             SUBSET   : 7 points (TIME)
 01-JAN-1910 00 / 1:  3273.
 07-JAN-1910 00 / 2:  3279.
 13-JAN-1910 00 / 3:  3285.
 19-JAN-1910 00 / 4:  3291.
 25-JAN-1910 00 / 5:  3297.
 31-JAN-1910 00 / 6:  3303.
 06-FEB-1910 00 / 7:  3309.