gnuplot autotitle columnheader with whitespaces

Question

How can I create a legend with whitespaces in the column header with autotitle? E.g. the first two lines of the data file:

T "x high" "x low"
0.1 3.14 0.0554

The legend should be:

T
x high
x low

Unfortunately gnuplot interprets it like this:

T
x
high

The quotes are simply ignored and the second column header is split into two. I couldn't find any information about this on the internet.

Answer 1

For me, which gnuplot version 4.6 the following works:

set key autotitle columnheader
plot 'file.dat' using 1:2 , '' using 1:3

and gives the legend

x high
x low

There is no problem with quoting.