[ncl-talk] Precipitation annual cycle

[Mary Haley]

Hello,

NCL always tries to use "nice" values on the X and Y axis. It will still
plot the data correctly, but you'll get a little bit of a margin.

If you don't want the margin, then use the trX/Y/Min/MaxF resources to
force the actual minimum and/or maximum that you want.

For example, in your case, if you want to set the maximum of the X axis to
the actual maximum of your X array, then set:

res2 at trXMaxF = max(x)

before you call gsn_xy.

By the way, if you want your tickmarks to point outward, you might try
using gsn_csm_xy instead of gsn_xy.

You can see the differences between the gsn_xy and gsn_csm_xy functions by
visiting these two example pages:

gsn_csm_xxx: http://www.ncl.ucar.edu/Applications/xy.shtml
gsn_xxx:     http://www.ncl.ucar.edu/Applications/generic_xy.shtml

--Mary


On Mon, Feb 12, 2018 at 10:15 PM, Dinuka Silva <dinu.kera at gmail.com> wrote:

> Hello,
>
> I am trying to plot annual cycle of precipitation. I could plot it but I
> have space after December. how can I remove that space?
>
>
>
>
> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/contributed.ncl"
> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/diagnostics_cam.ncl"
>
> begin
> ;----------------------------------------------------------------------
> f    =  "mon.precip.nc"
> f1   = addfile(f, "r")
>
> time = f1->time
> ymd = cd_calendar(time,2)
> iTime = ind (ymd.ge.19790101.and.ymd.lt.20130101)
> precip = f1->precip (iTime,{0:-12},{90:130})
>
> Avg = dim_avg_Wrap(dim_avg_Wrap( precip(time|:,lat|:,lon|:)))
> index = abs(Avg)
> index!0 = "time"
> index&time = Avg&time
> ;------------------------------------------------------------
> T = index&time
> YMD = cd_calendar(T,0)
> imont = tointeger(YMD(:,1))
> ;-----------------------------------------------------------------------
> k= new((/12/),float)
> do mo = 0,11
> mo1=mo+1
> Nmont = ind(imont.eq.mo1)
> k(mo) = dim_avg_Wrap(index(time|Nmont))
> end do
> ;printVarSummary(k)
> ;---------------------------------------------------------------------
> x = new((/12/),float)
> x = (/00.,01.,02.,03.,04.,05.,06.,07.,08.,09.,10.,11./)
> ;--------------------------------------------------------------
> res2                        = True
> res2 at tiMainString           = "Monthly precipitation"
> res2 at tiXAxisString          = "months"
> res2 at tiYAxisString          = "precipitation (mm/month)"
> res2 at xyLineColors           =  "blue"
> res2 at xyLineThicknessF       =  5.0
> res2 at tmXBMode               = "Explicit"
> res2 at tmXBValues             = x
> res2 at tmXBLabels    = (/"J","F","M","A","M","J","J","A","S","O","N","D"/)
> ;---------------------------------------------------------------------
> wks = gsn_open_wks("x11","")
> plot = gsn_xy(wks,x,k,res2)
> end
>
>
> [image: Inline image 1]
>
>
> Thank you.
>
> Sincerly,
> Dinuka
>
>
>
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