gnuplot-info

[Gnuplot-info] Representing large 2D matrix as colormapped pm3d map

[Nicholas K. <n....@us...>]

Hello--

I would like to create a dataset which is represented in an ASCII file 
as a large 2D matrix.  The matrix has hundreds of columns and thousands 
of rows.  I expect that the file will take up at least a few gigabytes 
of space.

Is there a way to represent this matrix as a pm3d map without having to 
let gnuplot load all of the data?  How would I instruct gnuplot to 
create a pm3d map (similar to a 2D image with colorbar) which will be 
indicative of trends in the data, but still smaller in size than the 
original dataset?

Nicholas
n....@us...

Re: [Gnuplot-info] Representing large 2D matrix as colormapped pm3d map

[Hans-Bernhard B. <HBB...@t-...>]

Nicholas Kinar wrote:

> I would like to create a dataset which is represented in an ASCII file 
> as a large 2D matrix.  The matrix has hundreds of columns and thousands 
> of rows.  I expect that the file will take up at least a few gigabytes 
> of space.
> 
> Is there a way to represent this matrix as a pm3d map without having to 
> let gnuplot load all of the data?

No.  You'll have to reduce that dataset to a manageable size outside 
gnuplot.  gnuplot is a plotting program, not a general-purpose data 
processing engine.

Re: [Gnuplot-info] Representing large 2D matrix as colormapped pm3d map

[Nicholas K. <n....@us...>]

Okay, thank you for your response.  I will reduce the dataset to a more 
meaningful size.

Nicholas

On 10-05-13 6:16 AM, Hans-Bernhard Bröker wrote:
> Nicholas Kinar wrote:
>
>> I would like to create a dataset which is represented in an ASCII 
>> file as a large 2D matrix.  The matrix has hundreds of columns and 
>> thousands of rows.  I expect that the file will take up at least a 
>> few gigabytes of space.
>>
>> Is there a way to represent this matrix as a pm3d map without having 
>> to let gnuplot load all of the data?
>
> No.  You'll have to reduce that dataset to a manageable size outside 
> gnuplot.  gnuplot is a plotting program, not a general-purpose data 
> processing engine.
>