[ncl-talk] PDF plot changes with bin_nice and without.

[Sri nandini]

Hello ncl users,

I have a question on plotting my PDF, which changes (as it should) with 
specific bin_nice and without.

Below is an example of my script, and the attached 2 plots, once with 
using the bin_nice and one with using the bin_min and max.

I don't understand why bin space and values change, can some one help me 
understand this?

Thanx Sri

~~~~~ snippet of the main PDF code~~~~


print("calculate PDFs...")
;; calculate empirical PDF

   opt          = True
   ;opt at bin_min = -50.  (i have also tried it with 100,75..)
   ;opt at bin_max =  50.
   opt at bin_nice=True
   pdf1 = pdfx(hist_anom1, 100, opt)
   printVarSummary(pdf1)
   pdf2 = pdfx(rcp45_anom1, 100, opt)
   printVarSummary(pdf2)
   pdf3 = pdfx(rcp85_anom1,100, opt)
   printVarSummary(pdf3)

;================================================================================
; prepare data for plotting
;================================================================================

   nVar    = 3
   nBin    = pdf1 at nbins          ; retrieve the number of bins

   xx      = new ( (/nVar, nBin/), typeof(pdf1))

   xx(0,:) = pdf1 at bin_center     ; assign appropriate "x" axis values
   xx(1,:) = pdf2 at bin_center
   xx(2,:) = pdf3 at bin_center

   yy      = new ( (/nVar, nBin/), typeof(pdf1))
   yy(0,:) = (/ pdf1 /) * 0.01 ;; convert % to absolut
   yy(1,:) = (/ pdf2 /) * 0.01
   yy(2,:) = (/ pdf3 /) * 0.01


~~~Than plotting~~~~~


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