[Gnuplot-info] Re: map view of data matrix with block structure

[Michael L. <M_L...@ho...>]

Hans-Bernhard Broeker <broeker <at> physik.rwth-aachen.de> writes:

> 
> Michael Lasarev wrote:
> > -snip-
> > What I want is a sharp distinction between the boundaries but nice 
> > color gradients in each submatrix showing the transition towards +/-
> > 1.
> 
> That wish is quite self-contradictive.
> 
 I wrote that poorly, you're right. I meant that I wanted
 a clear distinction between the positive- and negative-valued
 blocks of the matrix but with a gradient within each
 positive (negative) block showing how the values transition
 towards +1 (-1). [They are already close to the boundaries with
 absolute values > 0.8, mostly.] For instance a blue gradient 
 within the positive-valued block and a red gradient in the 
 negative-valued block, but without a 'zero colored' margin where
 it transitions from -0.8 to +0.8.

 corners2color did help, thank you. I also had good results
 by converting the matrix into three separate columns (x-position,
 y-position, z-position=correlation) and then 
   splot 'three_cols_of_data' u 1:2:3:3 with points pt 9 ps 0.70 palette
 
--Mike