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Re: How can I generate calander axis?
Hello Ansley Manke,
Thanks for your explanations.I have one more question.If I had
multiyear (for example 1948-1999) monthly time axis instead of one year,
what would I do to extract the only three months (Dec,Jan,Feb) and put
them in a new axis?.
Thank you very much in advance for your time and consideration
On Fri, 22 Mar 2002, Ansley Manke wrote:
> Hello Murat,
> I have a couple of ideas for you.
>
> 1. If you just want to plot the data from December through February,
> you can use the fact that your time axis is a modulo axis. To draw the
> plot you do not need to regrid the data.
>
> yes? use coads_climatology
> yes? plot/x=180/y=0/l=12:15 sst
>
> 2. If you need to make a new time axis, you can do that by giving Ferret more
> information about the time steps. The axis you have defined is what is called
> an abstract axis, where time has no units. You will want to decide just how to
> define the time steps for your particular application. SHOW AXIS/T will help you
> with that. In the example below, I just define an axis with three monthly points.
> The new axis is NOT a modulo axis, since the first point does not come after the
> last point.
>
> For example, using the coads_climatology data set;
>
> yes? use coads_climatology
> yes? show grid sst
> yes? show axis/t time
> yes? set view upper
> yes? plot/x=180/y=0 sst
>
> yes? def axis/t="1-dec-0000":"1-feb-0001":1/edges/units=months/t0="1-JAN-0000 00:00:00" myt
> yes? let sub_sst = sst[gt=myt]
> yes? set view lower
> yes? plot/x=180/y=0 sub_sst
>
> yes? sh axis/t myt
>
> Murat Gunduz wrote:
>
> > Dear Ferreters,
> > I am using FERRET v5.40,
> > after a lot of preprosesing finaly I generate the grid
> >
> > yes? show grid var
> > GRID (G005)
> >
> > name axis # pts start end
> > (AX008) LONGITUDE 46 r 15W 70.5E(430.5)
> > (AX009) LATITUDE 12 r 30N 50.9N
> > normal Z
> > MONTH_REG TIME 12mr 16-JAN 06:00 16-DEC 01:20
> >
> > I want to put the three months (dec-jan-feb) of the "month_reg"
> > axis into the new grid with old x and y axis.
> >
> > yes? define axis/t myt={1,2,12}
> > yes? let new_var=var[gt=myt]
> > yes? show grid new_clim
> > GRID (G006)
> > name axis # pts start end
> > (AX008) LONGITUDE 46 r 15W 70.5E(430.5)
> > (AX009) LATITUDE 12 r 30N 50.9N
> > normal Z
> > MYT T 3 i 1 12
> >
> > This worked,but the problem is there is no calendar label
> > of t axis. How can i say ferret to put the names of the months,
> > that is DEC,JAN,FEB, to the "myt" axis.
> >
> > Thank you in advance
> >
> > Murat GUNDUZ
> > Institute of Marine Science
> > METU, TURKEY
>
> --
> Ansley Manke Pacific Marine Environmental Laboratory Seattle WA (206)526-6246
>
>
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