[Gnuplot-info] Warning message

[<she...@be...>]

Hi Gnuploteers

When I run a gnuplot script (see below) that takes data from a file as
input (see below) I am getting the following warning message:

  line 26: warning: matrix contains missing or undefined values

Could you please tell me why I am getting this warning?

Thanks again!

Here is my script:


reset
unset key
unset colorbox
unset border
unset xtics
unset ytics
unset ztics
set palette gray

set multiplot
set size .25,1
set origin 0,0
set xrange [0:5]
set yrange [0:25]
plot 'test_2.dat' index 0 using 1:2:3 with labels left

set autoscale
set size square 1
set origin .10, 0
plot 'test_2.dat' index 1 matrix with image

unset multiplot


Here is an example data file:

0 23 "slice 1"
0 22 "volume 12"


0 2 4 4 5
5 4 4 2 1
5 4 4 4 5
1 2 4 2 1
0 2 4 6 4


1 23 "slice 10"
1 22 "volume 22"


0 2 4 4 5
5 4 4 2 1
5 4 4 4 5
1 2 4 2 1
0 2 4 6 4