[ncl-talk] warning:cnConstFEnableFill to enable fill

[Barry Lynn]

Hi:

My apologies for asking simple question, but where do you set the levels
you want to plot?

I see that these two lines are commented out.

;  res at cnLevelSelectionMode = "ExplicitLevels"   ; set explicit contour
levels

;  res at cnLevels  =
(/0.04,0.06,0.08,0.1,0.12,0.14,0.16,0.18,0.2,0.24,0.26,0.28,0.3,0.32,0.34,0.36,0.38,0.4/)


On Wed, Feb 21, 2018 at 1:23 PM, Kunal Bali <kunal.bali9 at gmail.com> wrote:

> Dear NCL users,
>
> I am trying to calculate the coefficient of divergence using the attached
> script. The script is running successfully but I am getting only one value
> i.e. 1 as a minimum and maximum value which should come in between 0 to 1.
> And because of that I am also receiving the warning such as
>
> warning:ContourPlotInitialize: scalar field is constant; no contour lines
> will appear; use cnConstFEnableFill to enable fill
> if I set
>
> res at cnConstFEnableFill = True
>
> then the whole field is drawn in a single color as expected it will give
> only one color.
>
>
>
> Regarding data
> The data is in different 5 grid structure covering different Indian region
> so I merged them and got one single file which cover whole Indian region
> and then runs the attached script.
>
> Before merging the data, I used the same script for different grid
> structures separately and it was giving the correct values between 0 to 1.
>
> But this time I am getting only one value.
>
> So could anyone please provide some information on that.
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> *Copyright (C) 1995-2017 - All Rights Reserved University Corporation for
> Atmospheric Research NCAR Command Language Version 6.4.0 The use of this
> software is governed by a License Agreement. See http://www.ncl.ucar.edu/
> <http://www.ncl.ucar.edu/> for more details.Variable: totcType: doubleTotal
> Size: 4050173952 bytes            506271744 valuesNumber of Dimensions:
> 3Dimensions and sizes:    [time | 96] x [lat | 2112] x [lon |
> 2497]Coordinates:             time:
> [35430.125..104813.7916666667]            lat:
> [5.0078125..37.9921875]            lon: [  59..  98]Number Of Attributes:
> 6  _FillValue :    -28672  long_name :    AOT at 0.55 micron  hdfeos_name
> :    Optical_Depth_055  projection :    Albers Conical Equal_Area  unit
> :    None  missing_value :    -28672Variable: totcType: doubleTotal Size:
> 4050173952 bytes            506271744 valuesNumber of Dimensions:
> 3Dimensions and sizes:    [time | 96] x [lat | 2112] x [lon |
> 2497]Coordinates:             time:
> [35430.125..104813.7916666667]            lat:
> [5.0078125..37.9921875]            lon: [  59..  98]Number Of Attributes:
> 6  _FillValue :    -28672  long_name :    AOT at 0.55 micron  hdfeos_name
> :    Optical_Depth_055  projection :    Albers Conical Equal_Area  unit
> :    None  missing_value :    -28672Variable: data_subsetType: doubleTotal
> Size: 295196160 bytes            36899520 valuesNumber of Dimensions:
> 3Dimensions and sizes:    [time | 96] x [lat | 646] x [lon |
> 595]Coordinates:             time:
> [35430.125..104813.7916666667]            lat:
> [29.5234375..19.4453125]            lon: [91.390625..82.109375]Number Of
> Attributes: 6  missing_value :    -28672  unit :    None  projection :
> Albers Conical Equal_Area  hdfeos_name :    Optical_Depth_055  long_name
> :    AOT at 0.55 micron  _FillValue :    -28672(0)    nearest location:
> k=0  n=481 m=882  156.836  5297.11(0)    -----(0)    -----Variable:
> CoD1Type: doubleTotal Size: 295196160 bytes            36899520
> valuesNumber of Dimensions: 3Dimensions and sizes:    [96] x [646] x
> [595]Coordinates: Number Of Attributes: 1  _FillValue :    -28672(0)
> min=1   max=1(0)    ---Variable: CoD2Type: doubleTotal Size: 3074960
> bytes            384370 valuesNumber of Dimensions: 2Dimensions and
> sizes:    [646] x [595]Coordinates: Number Of Attributes: 3  long_name :
> Coef of Divergence  _FillValue :    -28672  average_op_ncl :    dim_avg_n
> function was applied(0)    Coef of Divergence : min=1   max=1Variable:
> CoD_finalType: doubleTotal Size: 3074960 bytes            384370
> valuesNumber of Dimensions: 2Dimensions and sizes:    [646] x
> [595]Coordinates: Number Of Attributes: 1  _FillValue :    -28672(0)
> min=1   max=1warning:ContourPlotInitialize: scalar field is constant; no
> contour lines will appear; use cnConstFEnableFill to enable fill*
>
> ---
> Kunal
>
>
>
>
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>


-- 
Barry H. Lynn, Ph.D
Senior Lecturer,
The Institute of the Earth Science,
The Hebrew University of Jerusalem,
Givat Ram, Jerusalem 91904, Israel
Tel: 972 547 231 170
Fax: (972)-25662581

C.E.O, Weather It Is, LTD
Weather and Climate Focus
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