On Thu, 15 Oct 2015, Matteo Pelagatti wrote:

 Hi all,
 I am having a problem with the titles of the plots saved as pdf or eps when 
 variable names include underscores.
 It seems like underscores are interpreted as in LaTeX formulas when the plot 
 is saved as pdf and eps.
 Is this a bug? Is there a workaround?
 I attach the same plot saved as bmp and pdf and you'll see the difference.

This is due to a change in behavior in gnuplot 5 relative to earlier 
versions. Before, an underscore was by default just an underscore 
but now "enhanced" mode is the default for titles, labels and so on, 
and in that mode underscore produces a subscript.

In gretl's standard PNG output we've turned off enhanced mode to 
avoid that problem but it seems we've forgotten to
do that for pdf 
and eps (?). The trick is to include "noenhanced" in the line
of the gnuplot file that selects the "terminal" (output) type.
I'll look into it.

Allin Cottrell

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