[Gnuplot-info] Error plotting matrix

[Teodoro S. <Teo...@es...>]

Hi all,

I am trying to plot a matrix file with gnuplot 5.0.1 for Windows 32 bit using this script:

set term png enhanced font "Verdana,10" size 960, 720
set output 'test_ok.png'
set view map
dfile = 'test_data.txt'
set xrange [0:1008]
set yrange [0:720]
splot dfile matrix with image

But if I do not use the Verdana font and I let gnuplot use its default font (set term png enhanced size 960, 720), the following error is displayed:
"test_fail.txt", line 7: warning: Number of pixels cannot be factored into integers matching grid. N = 727489  K = 2018

I have googled about this error, and it seems related to errors in the input matrix file, but in my case it is correct, as in the first example it works.
Is this a bug in gnuplot?
Can anyone give a hint?
If you want to reproduce the problem, you can download the matrix file from here:
https://www.dropbox.com/s/2lwx1gtfe0w36ef/test_data.7z?dl=0

Thank you,
Teo