[ncl-talk] Contour Plot Help
Dennis Shea
shea at ucar.edu
Wed Sep 16 10:09:26 MDT 2015
As we always say .... the golden rule of data processing is 'look at your
data' !!!
Look at your min value ... -9.99999e11
Then the 'real values' are on rage (say) 350-600
I'd be shocked if that was not a 'missing value' which in NCL is _FillValue.
Please read the documentation on this.
Add ....
var at _FillValue = min(var) ; this will use the exact value
opt = True
opt at PrintStat = True
statb = *stat_dispersion*(var, opt )
printVarSummary(var)
printMinMax(var,0)
plot = gsn_csm_contour_map(wks, var, res)
On Wed, Sep 16, 2015 at 9:59 AM, Mariama Barr - Dallas <bama4 at umbc.edu>
wrote:
> My mistake, I see now that the data ranges significantly more, does this
> affect the contour even though I set a min and max for contouring?
>
> On Wed, Sep 16, 2015 at 11:57 AM, Mariama Barr - Dallas <bama4 at umbc.edu>
> wrote:
>
>> I have a software feature that displays all data values that I used
>> before, but for specifics, here is the printout:
>>
>>
>>
>>
>> On Wed, Sep 16, 2015 at 11:47 AM, Dennis Shea <shea at ucar.edu> wrote:
>>
>>> To my knowledge, you have not done what I requested. Right before you
>>> use the plot function
>>>
>>> printVarSummary(var)
>>> printMinMax(var,0)
>>>
>>> The output has not been sent to ncl-talk
>>> ---
>>>
>>>
>>> I'll also add that the following might help. Add this before the plot
>>> function
>>>
>>>
>>> https://www.ncl.ucar.edu/Document/Functions/Contributed/stat_dispersion.shtml
>>>
>>>
>>> ==
>>>
>>> opt = True
>>> opt at PrintStat = True
>>> statb = *stat_dispersion*(var, opt )
>>>
>>> printVarSummary(var)
>>> printMinMax(var,0)
>>>
>>> plot = gsn_csm_contour_map(wks, var, res)
>>>
>>> ===
>>>
>>>
>>> Also, as an experiment, you might try a run with
>>>
>>>
>>> *res at cnFillMode <https://www.ncl.ucar.edu/Document/Graphics/Resources/cn.shtml#cnFillMode>* = "RasterFill"
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> On Wed, Sep 16, 2015 at 8:37 AM, Mariama Barr - Dallas <bama4 at umbc.edu>
>>> wrote:
>>>
>>>> Well I have contour levels set at a min of 375 and a max of 425 and the
>>>> spacing is 10.0 and it still gives an algorithm failure error. I will try
>>>> and increase the spacing to see if it works but I really want as small
>>>> spacing as possible so that I can see smaller variations of the data in the
>>>> map.
>>>>
>>>> On Wed, Sep 16, 2015 at 10:32 AM, Rick Brownrigg <brownrig at ucar.edu>
>>>> wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> There would be a practical limit based upon your machine. Did you try
>>>>> intermediate values between 100M and 10G? How about Adam's suggestion of
>>>>> explicitly setting contour levels -- trying something fairly coarse and
>>>>> then dialing it back in until things fail. There's obviously something
>>>>> about the data that's requiring extreme amounts of workspace memory -- but
>>>>> its hard to say what without some sleuthing...
>>>>>
>>>>> Rick
>>>>>
>>>>>
>>>>> On Wed, Sep 16, 2015 at 8:17 AM, Mariama Barr - Dallas <bama4 at umbc.edu
>>>>> > wrote:
>>>>>
>>>>>> Yes, I also tried adjusting the space allocated in the .hluresfile
>>>>>> file from 100000000 to 10000000000. It gives an algorithm error. any
>>>>>> extreme allocatons gives a segmentation dump so I assume that there is a
>>>>>> reasonable limit to the amount that can be allocated to the ncarg graphics?
>>>>>>
>>>>>> On Tue, Sep 15, 2015 at 7:22 PM, Mary Haley <haley at ucar.edu> wrote:
>>>>>>
>>>>>>> Adam's suggestions were good ones. If you are trying to plot the
>>>>>>> entire globe, then try cutting back back on the number of contour levels
>>>>>>> too, if you are explicitly setting them.
>>>>>>>
>>>>>>> --Mary
>>>>>>>
>>>>>>>
>>>>>>> On Mon, Sep 14, 2015 at 12:47 PM, Mariama Barr - Dallas <
>>>>>>> bama4 at umbc.edu> wrote:
>>>>>>>
>>>>>>>> I am using NCL version 6.2.1. I commented those out because I was
>>>>>>>> using them previously to zoom in on a certain longitude and latitude but
>>>>>>>> right now I want to display the entire globe.
>>>>>>>>
>>>>>>>> On Mon, Sep 14, 2015 at 1:44 PM, Dennis Shea <shea at ucar.edu> wrote:
>>>>>>>>
>>>>>>>>> Before the plot = ..
>>>>>>>>>
>>>>>>>>> printVarSummary(var)
>>>>>>>>> printMinMax(var,0)
>>>>>>>>>
>>>>>>>>> Why did you comment out the mpMinLatF, etc resources?
>>>>>>>>>
>>>>>>>>> Please always include this information when sending questions to
>>>>>>>>> ncl-talk.
>>>>>>>>>
>>>>>>>>> Also ... the version of NCL you are using.
>>>>>>>>>
>>>>>>>>> ncl -V
>>>>>>>>>
>>>>>>>>> ==========
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On Mon, Sep 14, 2015 at 9:15 AM, Adam Phillips <asphilli at ucar.edu>
>>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>>> Hi Mariama,
>>>>>>>>>> My guess is that you have either a very high resolution grid
>>>>>>>>>> and/or a very noisy data array, and NCL is warning you that the output
>>>>>>>>>> graphic is exceeding the maximum size that is set.
>>>>>>>>>>
>>>>>>>>>> See the FAQ page here:
>>>>>>>>>> http://www.ncl.ucar.edu/FAQ/#err_msgs_012
>>>>>>>>>>
>>>>>>>>>> The solutions are:
>>>>>>>>>> 1) Increase your work station size as the FAQ describes.
>>>>>>>>>> 2) Change your contour settings. If it would be better to set
>>>>>>>>>> non-regular levels you can set cnLevelSelectionMode = "ExplicitLevels" and
>>>>>>>>>> set cnLevels to (/200,300,340,380,420,460,500/) (Those levels are a
>>>>>>>>>> complete guess.)
>>>>>>>>>> 3) If it is a very high resolution grid you can try plotting
>>>>>>>>>> every other point or every third point using ::2 or ::3 syntax.
>>>>>>>>>>
>>>>>>>>>> If none of those solutions help please let the ncl-talk email
>>>>>>>>>> list know.
>>>>>>>>>> Adam
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> On Mon, Sep 14, 2015 at 8:46 AM, Mariama Barr - Dallas <
>>>>>>>>>> bama4 at umbc.edu> wrote:
>>>>>>>>>>
>>>>>>>>>>> Hello,
>>>>>>>>>>> Everytime I try to manually set the contour spacing to a value
>>>>>>>>>>> 40.0 and below, I get a
>>>>>>>>>>> "fatal:ContourPlotDraw: Workspace reallocation would exceed
>>>>>>>>>>> maximum size 100000000" error. Below is my code:
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> --
>>>>>>>>>>> Mariama Barr-Dallas
>>>>>>>>>>> Meyerhoff Scholar/ NSA Scholar M23
>>>>>>>>>>> Computer Science Major, History Major
>>>>>>>>>>> University of Maryland Baltimore County
>>>>>>>>>>> Class of 2015
>>>>>>>>>>>
>>>>>>>>>>> _______________________________________________
>>>>>>>>>>> ncl-talk mailing list
>>>>>>>>>>> ncl-talk at ucar.edu
>>>>>>>>>>> List instructions, subscriber options, unsubscribe:
>>>>>>>>>>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> --
>>>>>>>>>> Adam Phillips
>>>>>>>>>> Associate Scientist, Climate and Global Dynamics Laboratory,
>>>>>>>>>> NCAR
>>>>>>>>>> www.cgd.ucar.edu/staff/asphilli/ 303-497-1726
>>>>>>>>>>
>>>>>>>>>> <http://www.cgd.ucar.edu/staff/asphilli>
>>>>>>>>>>
>>>>>>>>>> _______________________________________________
>>>>>>>>>> ncl-talk mailing list
>>>>>>>>>> ncl-talk at ucar.edu
>>>>>>>>>> List instructions, subscriber options, unsubscribe:
>>>>>>>>>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> --
>>>>>>>> Mariama Barr-Dallas
>>>>>>>> Meyerhoff Scholar/ NSA Scholar M23
>>>>>>>> Computer Science Major, History Major
>>>>>>>> University of Maryland Baltimore County
>>>>>>>> Class of 2015
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> ncl-talk mailing list
>>>>>>>> ncl-talk at ucar.edu
>>>>>>>> List instructions, subscriber options, unsubscribe:
>>>>>>>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Mariama Barr-Dallas
>>>>>> Meyerhoff Scholar/ NSA Scholar M23
>>>>>> Computer Science Major, History Major
>>>>>> University of Maryland Baltimore County
>>>>>> Class of 2015
>>>>>>
>>>>>> _______________________________________________
>>>>>> ncl-talk mailing list
>>>>>> ncl-talk at ucar.edu
>>>>>> List instructions, subscriber options, unsubscribe:
>>>>>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>>>>>
>>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Mariama Barr-Dallas
>>>> Meyerhoff Scholar/ NSA Scholar M23
>>>> Computer Science Major, History Major
>>>> University of Maryland Baltimore County
>>>> Class of 2015
>>>>
>>>> _______________________________________________
>>>> ncl-talk mailing list
>>>> ncl-talk at ucar.edu
>>>> List instructions, subscriber options, unsubscribe:
>>>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>>>
>>>>
>>>
>>
>>
>> --
>> Mariama Barr-Dallas
>> Meyerhoff Scholar/ NSA Scholar M23
>> Computer Science Major, History Major
>> University of Maryland Baltimore County
>> Class of 2015
>>
>
>
>
> --
> Mariama Barr-Dallas
> Meyerhoff Scholar/ NSA Scholar M23
> Computer Science Major, History Major
> University of Maryland Baltimore County
> Class of 2015
>
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