Re: [Gnuplot-info] CSV matrix using latest gnuplot 5.0 rc1

[sfeam <sf...@us...>]

On Wednesday, August 06, 2014 01:50:53 PM Mathias Brulatout wrote:
> Hi Gnuploters,
> 
> I'm utrying to plot data using a matrix with an svg output.
> 
> Here is my data file :
> 
>  ,30 ,60 ,90 ,120
> 100, 3.2, 1.81, 1.59, 1.48
> 200, 4.57, 2.93, 2.5, 2.03
> 300, 6.26, 4.19, 3.38, 2.96
> 400, 8.46, 5.67, 4.96, 3.68
> 
> Actually, it's 10x10 CSV matrix with row and column labels, but I truncated
> it to get a more readable 4x4 CSV matrix (still with row/column headers)
> 
> And now my (minimal) script :
> 
> set terminal svg
> set output 'file.svg'
> set datafile separator ","
> plot 'file' matrix rowheaders columnheaders using 1:2:3 notitle  with image
> set datafile separator
> 
> Gnuplot doesn't complain at all, but I do !
> x and y scale is OK, as well as the "color scale" from min to max.
> However nothing is plot between my 2 axis ... It's not the first time I use
> a svg terminal (although it's my first time with a matrix image).
> 
> It seems that row/columnheaders is a quite new feature ... Is this not a
> svg terminal feature yet? (is it output terminal-dependant?).

Yes.  It's a new feature that will be in -rc2 but was not ready in time for 
rc1.

Your test case works fine here with svg output.
I used:

$DATA << EOD
  ,30 ,60 ,90 ,120
 100, 3.2, 1.81, 1.59, 1.48
 200, 4.57, 2.93, 2.5, 2.03
 300, 6.26, 4.19, 3.38, 2.96
 400, 8.46, 5.67, 4.96, 3.68
EOD

set datafile separator comma
set term svg standalone
set output 'plot.svg'
plot $DATA matrix rowheaders columnheaders using 1:2:3 notitle  with image
unset output

Note that the display of image data in svg depends on how the browser/viewer
chooses to render it.  You might try adding the "pixels" keyword at the end
of the command to force it render each element independently of its neighbors.

	Ethan






>
>
> PS : It works perfectly with a png terminal.
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