Trouble with setting ini files : gnuplot and vi

[Fergus Daly]

>> Despite best efforts I cannot find a way of setting user preferences 
>> for vi (e.g. preferred syntax-sensitive settings) and gnuplot (e.g. preferred line colours / thickness).
>> I have tried editing /etc/vimrc, /etc/virc for vi; and /etc/X11/app-defaults/Gnuplot for gnuplot accordingly.
>> (I use gnuplot-x11.) No change from standard representation.
>> Any ideas?

> If you are really using /usr/bin/vi and not /usr/bin/vim, then you are using the small version of vim,
> which does not support filetype detection or syntax highlighting as well as some other vim features.
> If you want a full-featured vim, install the vim package.
> Regards, Gary

Seen immediately after my reply to Eliot. Thanks very much - now all is clear.
Fergus