[ncl-talk] How to change the longitude

[Dennis Shea]

For a map, you would set the  mpCenterLonF resource

      res at mpCenterLonF  = 210     ; center longitude

For example:

*https://www.ncl.ucar.edu/Applications/Images/cmorph_4_lg.png*
<https://www.ncl.ucar.edu/Applications/Images/cmorph_4_lg.png>

This shows and  uninterrupted Indian/Pacific/Atlantic Oceans

---
You did not include a printVarSummary(fine) or a sample graphic.
So, it is hard to know how to answer the question.
---
You may have to

[1] Manually reorder the plotted variable or the *original *variable
[2] Possibly, if the longitudes span 360, the *lonPivot *
<http://www.ncl.ucar.edu/Document/Functions/Contributed/lonPivot.shtml>could
be used to reorder the *original* array.



On Mon, Jul 29, 2019 at 1:45 PM Anahita Amiri Farahani via ncl-talk <
ncl-talk at ucar.edu> wrote:

> Hi all,
>
> I am trying to change the longitude axis for plot, because both Atlantic
> and Pacific Oceans are important for example instead of starting from zero
> I would prefer to start from 60E and another possibility is longitude goes
> from -30 to 360. how can I do that, this is my script:
>
>
> wks   = gsn_open_wks ("eps", "omega_response")        ; send graphics to
> PNG file
>  gsn_define_colormap(wks,"BlRe")
>  res                 = True                    ; plot mods desired
>  res at tiMainString    = "Omega Response"        ; title
>   res at gsnDraw   = False                             ; don't draw yet
>   res at gsnFrame  = False                             ; don't advance yet
>   res at cnLevelSpacingF = 2.                      ; contour interval
>
> res at trYMinF     = 100;0 ; set minimum Y-axis value
> res at trYMaxF     =  1000;12250;1200 ; set maximum Y-axis value
>
> res at cnLevelSelectionMode =  "ManualLevels"   ; AutomaticLevels
>   res at cnMinLevelValF       = -0.05              ; min level
>   res at cnMaxLevelValF       =  0.05             ; max level
>   res at cnLevelSpacingF      =  0.005                ; interval
>
>  res at cnLinesOn       = False                   ; turn off contour lines
>  res at cnLineLabelsOn  = False                   ; tuen off line labels
>
>  res at cnFillOn        = True                    ; turn on color
>  res at trYReverse = True                     ; reverse Y-axis
>  res at gsnContourZeroLineThicknessF = 2.       ; doubles thickness of zero
> contour
>
> plot = gsn_csm_hov(wks, fine1, res)
>
>
> Thanks,
> Ana
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