Hi,
gnuplot complains about missing values when only a single obs (row) is
provided, at least in matrix format. Example:
<hansl>
m1 = {1,2,3}
m2 = {1,2,2}
m = m1 | m2
gnuplot --matrix=m --output=display
gnuplot --matrix=m1 --output=display # fails
</hansl>
I would expect that with a single obs the plot only contains some points
(here: two) directly vertically above the respective x-axis value (here
in m1: 3). I see no intrinsic reason why this wouldn't make sense or
wouldn't be possible.
cheers
sven