Re: [ferret_users] Graticules step?

[Jaison Kurian <jaison@xxxxxxxxxxxxxxxxxx>]

Hi Danish,
            Good suggection !!!! But you can do this if you are ready to
play with few viewports and pplus commands for time axis. Here is an example.

!-------------example.jnl-----------------------------
\ cancel mode verify
  define axis/t="01-JAN-2001:00":"5-JAN-2001:00":1/units=hours/\
           T0="31-DEC-2000:00"/calendar=noleap time
  let tide = sin(t[gt=time]/10)      ! a dummy variable

  define view/xlim=0:1/ylim=0:1 v1  ! three viewports, differs only in name
  define view/xlim=0:1/ylim=0:1 v2  !
  define view/xlim=0:1/ylim=0:1 v3  !

  set view v1            ! first viewport, for making plot and graticules
      ppl txlabp -1      ! time axis label at lower side of the plot
      ppl txnmtc 3       ! three small tics between the large tics (for grat.)
      ppl axset 1,1,1,1  ! draw all 4 axes
      PLOT/THICK=2/VGRAT="LARGE(line,COLOR=red),SMALL(line,COLOR=lightblue)"\
              /set tide  ! with graticule argument
        ppl txtype mon,day    ! month and day labelling on two lines
        ppl txlint 1,1        ! label all the days and month
        ppl txlsze 0.12,0.12  ! font size of all labels set to 0.12
        ppl axlsze 0.12,0.12  !    "
      ppl plot                ! make the plot

  set view v2            ! second viewport, to do the hour tic marking
     ppl txnmtc 23       ! 23 small tics between two large tics
     ppl axset 1,1,0,0   ! draw only the top and bottom time axes
     plot/nolab/set/vlim=0:10 tide*0+10000 ! no plot, only the axes will be drawn
        ppl txlsze 0.0,0 ; ppl axlsze ,0.0 ! no axis labels
        ppl txtype mon,day                 ! the format of time axis
     ppl plot                              ! make the small hourly tic marks

  set view v3            ! third viewport (optional, to get red color for 00hrs)
     ppl txnmtc 0        ! no small tics
     plot/nolab/set/vlim=0:10/VGRAT="SMALL(line,COLOR=red)" tide*0+10000 ! should be like this
        ppl txlsze 0.0,0 ; ppl axlsze ,0.0 ! nolabels on axes
        ppl txtype mon,day                 ! axis format
     ppl plot                              ! draw the red line for 00hrs
!---------------end of example.jnl----------------------------------------------

Regards,

Jaison

On Mon, 12 Sep 2005, danish wrote:

> Hi everyone,
>
> I try to use graticules this qualifer in my script.
> I noticed it follows Large and Small tics.
> It means  we need to change tics set to control gradticules.
> Is it possible to add an option like "graticules step" to control plot gradticules every n small(or large) tics without control tics itself?
> This idea comes with my figures which shows tide level time series.
> When I try to add gradticules line every 6 hours but keeps 1 hour small tic to indicate, I found myself having trouble with this!
> Any ideas?
>
> dan