[ncl-talk] help

[Mary Haley]

In the attachment you sent, I see at least two shades of green, plus white,
so there is more than one color showing up in the plots.

Also, you are specifying 16 contour levels, but then only providing 11
colors. That is why you are seeing some of the colors repeat themselves on
the labelbar.  Is this what you intended?
If you provide 16 levels, then you need to provide 17 colors, because the
levels represents values between colors.

[ For more information on how contour levels work in NCL, see conLev_3.ncl
at http://www.ncl.ucar.edu/Applications/contourLev.shtml#ex3 ]

The plot that you attached indicates that your maximum values are roughly
less than 30, and that you have lots of values that are either missing or
fall below 0.8 (these are the levels you specified to be white).

Did you actually look at your data to verify that you have the values that
you expect?   I recommend doing a printMinMax on your data, each time in
the loop:

printMinMax(precSeaClm(ns,:,:),0)
printMinMax(prec1SeaClm(ns,:,:),0)

If you continue to have problems with this, it would help if you could
provide the data. You can do this offline, and you can use our ftp:

http://www.ncl.ucar.edu/report_bug.shtml#HowToFTP

--Mary


On Sun, Aug 23, 2015 at 10:13 PM, afwande juliet <afwandej965 at gmail.com>
wrote:

> ok Mary
>
> When I plot seasonal anomalies, only one color appears and yet the values
> range from 0-3300. I want  different colors spread showing areas of low and
> high rainfall anomalies. This is not shown irrespective of the contours and
> color set.
> see script and sample of pot i get.
>
> On Mon, Aug 24, 2015 at 1:02 PM, Mary Haley <haley at ucar.edu> wrote:
>
>> I'm not sure what you are asking for, since you didn't provide the full
>> script or a sample image.
>>
>> Please be more specific about what kind of plot you are trying to create:
>> for example, do you want to draw filled contours of both datasets on the
>> same plot, but each with its own set of colors and levels?    How are
>> creating the contour plot(s)?  You only included the resource settings.
>>
>> Also, what do you mean by "low(-ve)" and "high(+ve)" values?  Your said
>> your values start at 0, so I'm assuming you don't have any negative values.
>>
>> --Mary
>>
>>
>> On Tue, Aug 18, 2015 at 11:00 AM, george luke <lukejuliet2015 at gmail.com>
>> wrote:
>>
>>> Dear NCL users
>>>
>>> I have two datasets , one has PrintMinMax(min=0,max=47) and second has
>>> PrintMinMax(min=0,max=3400). When  i plot using common label bar, only
>>> values between 0 to 100 are displayed in contours. When i incerease
>>> contours upto 3500 I dont get small values. Below is part of my script for
>>> contouring and colour.
>>>
>>> When now I plot seasonal anomiales only 1 colour is displayed.
>>>
>>> *This is what I want;  *anomalies to be plotted with different colors
>>> showing areas of low(-ve) and high(+ve) values.
>>>
>>>
>>>
>>>
>>> ;************************************************
>>> ; create colors
>>> ;*************************************************
>>>   wks = gsn_open_wks("x11", "seasons")          ; open  a work station
>>>
>>>
>>>  colors = (/ (/255,255,255/),(/255,255,255/), (/244,255,244/), \
>>>   (/217,255,217/), (/163,255,163/), (/106,255,106/), \
>>>   (/43,255,106/), (/0,224,0/), (/0,134,0/),(/255,255,0/),\
>>>   (/255,127,0/) /) * 1.0 ; we multiply by 1 to make colors float
>>>
>>>  colors = colors/255.               ; normalize (required by NCL)
>>>
>>>  ;************************************************
>>> ; create panel plots
>>> ;*************************************************
>>>  plot   = new ( 6, graphic)                    ; create graphical array
>>>
>>>   res                      = True               ; plot options desired
>>>
>>>   ;res at cnFillDrawOrder      = "Predraw"
>>>   res at cnFillOn             = True               ; turn on color fill
>>>   res at cnInfoLabelOn        = False              ; turn off contour info
>>> label
>>>   res at cnLinesOn            = False              ; turn off contour lines
>>>   res at cnLineLabelsOn       = False              ; turn off line labels
>>>   res at cnFillPalette        =colors
>>>   res at cnLevelSelectionMode = "ExplicitLevels"   ; set explicit contour
>>> levels
>>>   res at cnLevels
>>> =(/0.1,0.2,0.4,0.8,1.6,3.2,6.4,12.8,25,30,40,45,60,75,83,100/)
>>>
>>>
>>>
>>>
>>>
>>> thanks
>>>
>>>
>>> _______________________________________________
>>> ncl-talk mailing list
>>> ncl-talk at ucar.edu
>>> List instructions, subscriber options, unsubscribe:
>>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>>
>>>
>>
>> _______________________________________________
>> ncl-talk mailing list
>> ncl-talk at ucar.edu
>> List instructions, subscriber options, unsubscribe:
>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.ucar.edu/pipermail/ncl-talk/attachments/20150824/10b1eaad/attachment.html