[ncl-talk] Dimension (nlon) of (var0) does not have an associated coordinate variable

[Hughlett, Taylor M]

Good afternoon,

Thank you very much for the suggestion! I have used the function that you recommended, but now I am receiving the following error:

Number of subscripts do not match number of dimensions of variable,(1) Subscripts used, (2) Subscripts expected

It occurs at the line where I actually create the plot:

plot(0)   = gsn_csm_xy (wks,years,var0(:,ll_ind(0),ll_ind(1)),res)

I have checked that var0 is three dimensional, and I have specified three subscripts required…

Have I missed something?

Taylor M Hughlett, Ph.D.
UTA Earth and Environmental Sciences
500 Yates St.
Geoscience Bldg Rm 117
Arlington, TX 76013-0049

The Full Code:

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"

begin

;**************************************************
; Set file paths and plot specifics
;**************************************************

print("Setting File Paths")

;***** File Paths and Names *****

case       = "b.e12.B1850C5CN.f09_g16.YD13ka.003"
filen      = "b.e12.B1850C5CN.f09_g16.YD13ka.003.pop.SFWF.1_cat_840.nc"
file_loc   = "/glade/scratch/hughlett/csm/b.e12.B1850C5CN.f09_g16.YD13ka.003/ocn/tseries/cat/"
grid       = "b.e12.B1850C5CN.f09_g16.YD13ka.003.pop.h.0810.nc"
grid_loc   = "/glade/scratch/hughlett/csm/b.e12.B1850C5CN.f09_g16.YD13ka.003/ocn/hist/"
plot_loc   = "/glade/scratch/hughlett/plots/b.e12.B1850C5CN.f09_g16.YD13ka.003/timeseries"

;***** Variable to Plot *****

var        = "SFWF"

;***** Text for Plot *****

CenterString = "Surface Freshwater Flux"
YAxisString  = "SFWF (Sverdrups)"
XAxisString  = "Years"

;***** Start and End Time for Plot *****

plot_begin = 0001
plot_end   = 840

;***** Data Options (0 = no, 1 = yes) *****

smooth  = 0
dtrd    = 0
ncwrite = 0

;**************************************************
; Read In and Process Data
;**************************************************

print("Reading in and processing data")
;***** Read in All Variables *****

fvar  = addfile(file_loc+filen,"r")
fgrid = addfile(grid_loc+grid,"r")

var0  = fvar->SFWF(:,:,:)
lat2d = fgrid->TLAT
lon2d = fgrid->TLONG

lat = 50
lon = 28

;***** Create a More Plottable Timeline *****

years = ispan(plot_begin,plot_end,1)
nyrs = dimsizes(years)

;***** Get indicies of the point to plot *****

ll_ind = getind_latlon2d( lat2d, lon2d, lat, lon)

;**************************************************
; Open workstation, set plot resources, and plot
;**************************************************

print("Creating Plot")

;***** Create Plot Name *****

pname = var + "." + case + "_" + "timeseries_0m" + plot_begin + "-" + plot_end

;***** Open workstation *****

wks = gsn_open_wks("ps",plot_loc+pname)

;***** Set Resources *****

res                      = True
res at gsnMaximize          = True
res at gsnFrame             = False
res at gsnDraw              = False
res at vpHeightF            = .23
res at vpWidthF             = .783
res at tiXAxisFontHeightF   = .015
res at tiYAxisFontHeightF   = .015
res at tmYLLabelFontHeightF = .015
res at tmXBLabelFontHeightF = .015
res at gsnLeftString        = " "
res at gsnRightString       = " "
res at xyLineColor          = (/"black"/)
res at gsnCenterString      = CenterString
res at tiYAxisString        = YAxisString
res at tiXAxisString        = XAxisString
res at trYMinF              = 15
res at trYMaxF              = 19

;***** Create New Plot *****

plot      = new(1,graphic)
plot(0)   = gsn_csm_xy (wks,years,var0(:,ll_ind(0),ll_ind(1)),res)

print("Plot Created")

end



From: Alan Brammer <abrammer at albany.edu<mailto:abrammer at albany.edu>>
Date: Wednesday, February 1, 2017 at 2:15 PM
To: "Hughlett, Taylor M" <taylor.hughlett at uta.edu<mailto:taylor.hughlett at uta.edu>>
Cc: "ncl-talk at ucar.edu<mailto:ncl-talk at ucar.edu>" <ncl-talk at ucar.edu<mailto:ncl-talk at ucar.edu>>
Subject: Re: [ncl-talk] Dimension (nlon) of (var0) does not have an associated coordinate variable

 If you were plotting a map, like Barry Lynn's similar question today also on ncl-talk, you would want to do:

var0 at lon2d = lon2d
var0 at lat2d = lat2d

The below lines are not needed.
    ; LON2D  = lon2d(::1,::1)        ;; I don’t think (::1,::1) does anything,  it will take all values with an increment of 1, i.e. the whole array.
    ; LAT2D  = lat2d(::1,::1)   ;   so this is just redundant characters which aren’t needed.
You don’t need to replicate a variable that already exists.

To set coordinate variables named nlon and nlat, you want to use the & syntax not the @ syntax, but coordinate subscripting won’t work with 2d coordinates anyway.

So instead get the index of the point you want using:
https://www.ncl.ucar.edu/Document/Functions/Contributed/getind_latlon2d.shtml
e.g.

ll_ind = getind_latlon2d( lat2d, lon2d, 28,50)
…
…
plot(0)   = gsn_csm_xy (wks, years, var0(:, ll_ind(0), ll_ind(1) ), res)



Good luck,

Alan


##############################
Alan Brammer,
Post-Doc Researcher

Department of Atmospheric and Environmental Sciences,
University at Albany, State University of New York, Albany, NY, 12222
abrammer at albany.edu<mailto:abrammer at albany.edu>
##############################
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