[ncl-talk] showing range in bar plot

[Rashed Mahmood]

Hi Debasish,
Try the following:


begin
     arr =    (/2569,7000,12.25,81.65,58.8/)
     minval = (/541,2190,7.83,49.33,38.88/)
     maxval = (/4006,10456,19.34,137.7,77.42/)

 wks_type = "x11"
 wname = "bar"
   wks = gsn_open_wks(wks_type,wname)
;************************************************
; create panel plots
;*************************************************
  res            = True
  res at gsnDraw  = False
  res at gsnFrame = False
  res at gsnXYBarChart = True                 ; plot mods desired
  res at trYMinF       = 0
  res at trYMaxF       = max(maxval)+0.1*max(maxval)
  lres                   = True                    ; polyline mods desired
  lres at gsLineColor       = "black"
  lres at gsLineThicknessF  = 2.5                     ; thickness of lines
  lres at gsLineDashPattern = 0
  lres at gsLineColor       = "gray50"

   plot = gsn_csm_xy(wks,ispan(1,5,1),arr,res)

 dum = new(dimsizes(arr),graphic)
 x = ispan(1,5,1)
 do n=0,dimsizes(dum)-1
    dum(n) =
gsn_add_polyline(wks,plot,(/x(n),x(n)/),(/minval(n),maxval(n)/),lres)
 end do
 draw(plot)
 frame(wks)
;***********
end


Each y-error is drawn separately. There is also a simple function here for
adding error bars (example 12):
<https://www.ncl.ucar.edu/Applications/Scripts/scatter_12.ncl>

https://www.ncl.ucar.edu/Applications/scatter.shtml


Cheers,
Rashed




On Fri, Mar 9, 2018 at 10:56 AM, Debasish Hazra <debasish.hazra5 at gmail.com>
wrote:

> I am trying to do a barplot with vertical error bars that will show the
> range. But the figure shows bars only, with any error bars associated. What
> is needed to add error bars in the figure ?
>
> 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/shea_util.ncl"
> ;********************************************
> begin
>      arr =    (/2569,7000,12.25,81.65,58.8/)
>      minval = (/541,2190,7.83,49.33,38.88/)
>      maxval = (/4006,10456,19.34,137.7,77.42/)
>
>  wks_type = "png"
>  wname = "bar"
>    wks = gsn_open_wks(wks_type,wname)
> ;************************************************
> ; create panel plots
> ;*************************************************
>   res            = True
>   res at gsnDraw  = False
>   res at gsnFrame = False
>   res at gsnXYBarChart = True                 ; plot mods desired
>   lres                   = True                    ; polyline mods desired
>   lres at gsLineColor       = "black"
>   lres at gsLineThicknessF  = 2.5                     ; thickness of lines
>   lres at gsLineDashPattern = 0
>   lres at gsLineColor       = "gray50"
>
>    plot = gsn_csm_xy(wks,ispan(1,5,1),arr,res)
>    dum = gsn_add_polyline(wks,plot,minval,maxval,lres)
>
>  draw(plot)
>   frame(wks)
> ;********************************************
> end
>
> Thanks.
> Debasish
>
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