[ncl-talk] How to plot large size data to contour

[Tao Lu]

Hi Mary,

Thank you very much.
I love you.

Here always makes me find how interesting to make a clean and smart work.

Tao

On Tue, Feb 14, 2017 at 4:51 AM, Mary Haley <haley at ucar.edu> wrote:

> Tao,
>
> I was out last week.
>
> You can contour by region using the "overlay" procedure.
>
> See the attached script, which contains the URL where you can get the data
> file in the comments. I first draw the plot using the full data set.  I
> then arbitrarily divide the lat/lon into subregions and draw the data again.
>
> This is a rectilinear grid, so it's easy to divide the data into
> subregions.  If you have curvilinear data, then you will need to subset the
> 2D lat/lon data as well as the data itself.
>
> --Mary
>
>
>
>
> On Thu, Feb 2, 2017 at 11:03 PM, Tao Lu <hakufu.asano at gmail.com> wrote:
>
>> Mary,
>>
>> Thank you for your helpful information.
>> I will try that.
>>
>> On my occasion, i am more interested in how to add some data to contour.
>> You know when you make contour plot you have to assign the data to array.
>> If the data is too big, the array will be over memory allowed.
>> So i want to know if it is  possible to divide a single complete contour
>> (e.g. pressure contour of specific time) into several part.
>> Just like, "a" in *write_table*("list.txt", "a", flist, "%s"), which
>> means add.
>> You plot one part , then add other parts of the contour plot.
>>
>> Thank you,
>> Tao
>>
>> On Fri, Feb 3, 2017 at 2:50 PM, Mary Haley <haley at ucar.edu> wrote:
>>
>>> Tao,
>>>
>>> One of the first things I try with contouring large data is to turn on
>>> raster contours by setting:
>>>
>>> res at cnFillMode = "RasterFill"
>>>
>>> This can sometimes make a significant difference in speed.
>>>
>>> If this doesn't help, you can add a second resource:
>>>
>>> res at trGridType = "TriangularMesh"
>>>
>>> Finally, if you are getting a message:
>>>
>>>     fatal:ContourPlotDraw: Workspace reallocation would exceed maximum
>>> size
>>>     16777216
>>>     fatal:ContourPlotDraw: draw error
>>>     fatal:ContourPlotDraw: draw error
>>>     fatal:PlotManagerDraw: error in plot draw
>>>     fatal:_NhlPlotManagerDraw: Draw error
>>>
>>> Then see this URL, which provides some information about things to try.
>>>
>>> http://www.ncl.ucar.edu/FAQ/#err_msgs_012
>>>
>>> --Mary
>>>
>>>
>>> On Thu, Feb 2, 2017 at 6:10 PM, Tao Lu <hakufu.asano at gmail.com> wrote:
>>>
>>>> Dear ncl-talk,
>>>>
>>>> I have a large ASCII data (200files, each of them is 2 mb binary).
>>>> The contour plot I want to get need all the files' data.
>>>>
>>>> What I have done now is to convert binary to the ascii format which is
>>>> easy to plot.
>>>> Then each binary data will become 140 mb ascii.
>>>> And it takes more time to plot.
>>>>
>>>> If I have to plot them, with limited memory and fast speed, anyone have
>>>> any idea?
>>>>
>>>> Thank you,
>>>> Tao
>>>>
>>>> --
>>>> ******************************************************
>>>> 盧 涛 (ル タオ) 修士課程2年
>>>>
>>>> 〒112-8551 東京都文京区春日1-13-27
>>>>
>>>> 中央大学理工学研究科都市環境学専攻
>>>>
>>>> 河川・水文研究室（山田正教授）
>>>>
>>>>
>>>> TEL: 03-3817-3406;   Phone: 070-2188-7509
>>>> Email1: hakufu.asano at gmail.com <mail%3Amet.yamos at gmail.com>
>>>> Email2: lutao at civil.chuo-u.ac.jp <mail%3Ayamoto at civil.chuo-u.ac.jp>
>>>> *******************************************************
>>>> ******************************************************
>>>> Tao Lu    (M. Eng)
>>>> Laboratory of River Engineering and Hydrology,
>>>> Dept. of Civil and Environmental Engineering,
>>>> Graduate School of Science and Engineering,
>>>> Chuo University
>>>>
>>>> 1-13-27,Kasuga,Bunkyo-ku,Tokyo
>>>> 112-8551, Japan
>>>> TEL: 03-3817-1805;   Phone: 070-2188-7509
>>>> Email1: hakufu.asano at gmail.com <mail%3Amet.yamos at gmail.com>
>>>> Email2: lutao at civil.chuo-u.ac.jp <mail%3Ayamoto at civil.chuo-u.ac.jp>
>>>> *****************************************************
>>>>
>>>> _______________________________________________
>>>> ncl-talk mailing list
>>>> ncl-talk at ucar.edu
>>>> List instructions, subscriber options, unsubscribe:
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>>>>
>>>>
>>>
>>
>>
>> --
>> ******************************************************
>> 盧 涛 (ル タオ) 修士課程2年
>>
>> 〒112-8551 東京都文京区春日1-13-27
>>
>> 中央大学理工学研究科都市環境学専攻
>>
>> 河川・水文研究室（山田正教授）
>>
>>
>> TEL: 03-3817-3406;   Phone: 070-2188-7509
>> Email1: hakufu.asano at gmail.com <mail%3Amet.yamos at gmail.com>
>> Email2: lutao at civil.chuo-u.ac.jp <mail%3Ayamoto at civil.chuo-u.ac.jp>
>> *******************************************************
>> ******************************************************
>> Tao Lu    (M. Eng)
>> Laboratory of River Engineering and Hydrology,
>> Dept. of Civil and Environmental Engineering,
>> Graduate School of Science and Engineering,
>> Chuo University
>>
>> 1-13-27,Kasuga,Bunkyo-ku,Tokyo
>> 112-8551, Japan
>> TEL: 03-3817-1805;   Phone: 070-2188-7509
>> Email1: hakufu.asano at gmail.com <mail%3Amet.yamos at gmail.com>
>> Email2: lutao at civil.chuo-u.ac.jp <mail%3Ayamoto at civil.chuo-u.ac.jp>
>> *****************************************************
>>
>
>


-- 
******************************************************
盧 涛 (ル タオ) 修士課程2年

〒112-8551 東京都文京区春日1-13-27

中央大学理工学研究科都市環境学専攻

河川・水文研究室（山田正教授）


TEL: 03-3817-3406;   Phone: 070-2188-7509
Email1: hakufu.asano at gmail.com <mail%3Amet.yamos at gmail.com>
Email2: lutao at civil.chuo-u.ac.jp <mail%3Ayamoto at civil.chuo-u.ac.jp>
*******************************************************
******************************************************
Tao Lu    (M. Eng)
Laboratory of River Engineering and Hydrology,
Dept. of Civil and Environmental Engineering,
Graduate School of Science and Engineering,
Chuo University

1-13-27,Kasuga,Bunkyo-ku,Tokyo
112-8551, Japan
TEL: 03-3817-1805;   Phone: 070-2188-7509
Email1: hakufu.asano at gmail.com <mail%3Amet.yamos at gmail.com>
Email2: lutao at civil.chuo-u.ac.jp <mail%3Ayamoto at civil.chuo-u.ac.jp>
*****************************************************
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