[ncl-talk] Multi-line plot with different time length of data

[Rick Brownrigg]

Hi,

One possibility would be to load the shorter 5th array's data into an array
the same size as the rest, but set the first twelve values (862-850 to
missing values; that is @_FillValue

as demonstrated by the script below:

Rick


; ***********************************************
; xy_1.ncl
;
; Concepts illustrated:
;   - Drawing a black-and-white XY plot
;
;************************************************
; These files are loaded by default in NCL V6.2.0 and newer
; load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
; load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
;************************************************
begin
;************************************************
; read in data
;************************************************
 f     = addfile ("$NCARG_ROOT/lib/ncarg/data/cdf/uv300.nc","r")
 u     = f->U                                    ; get u data
;************************************************
; plotting parameters
;************************************************
 wks   = gsn_open_wks ("x11","xy")               ; send graphics to PNG file

 res                  = True                     ; plot mods desired
 res at tiMainString     = "Basic XY plot"          ; add title

 plot  = gsn_csm_xy (wks,u&lat,u(0,:,{82}),res) ; create plot

 u(0,0:15,{82}) = u at _FillValue
 plot  = gsn_csm_xy (wks,u&lat,u(0,:,{82}),res) ; create plot
end



On Thu, May 30, 2019 at 8:36 AM S Br <sbr.climate at gmail.com> wrote:

> Hi All,
> I am doing a multi-line plot with 5 different sets of data. All my data
> has annual mean values.
> 4 sets of data extends for the period 850-2005, where as the 1 sets of
> data extends for the period 862-2005.
> In the line plot, the first 4 sets of data should start at year 850, where
> the 5th line should start at year 862. I am doing following things but all
> line starts from year 850.
> Could you please suggest how to start first 4 lines from 850 and the 5th
> line from year 862.
>
>   temp1           =  f1->tos(:,0,0)
>   printVarSummary (temp1)
>   temp2           =  f2->tos(:,0,0)
>   temp3           =  f3->tos(:,0,0)
>   temp4           =  f4->tos(:,0,0)
>   temp5           =  f5->tos(:,0,0)
>
>   time = ispan(850,2005,1)
>   time at long_name = "Time"
>
>   data            = new((/5,1156/),float)
>   data(0,0:1155)  = temp1
>   data(1,0:1155)  = temp2
>   data(2,0:1155)  = temp3
>   data(3,0:1155)  = temp4
>   data(4,0:1138)  = temp5
>
> wks =  gsn_open_wks("X11", "Multiline_NCL")
>
> res = True
>   res at xyXStyle               = "Time"
>
> ;-- create plot
>   plot = gsn_csm_xy(wks,time,data,res)
>
> Thank you.
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