[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...