create views and use them to plot more than one pn on same graph

[zc] / gnuplot / offset.sql

drop table if exists axis_offset;
create table axis_offset (
        pn integer primary key,
        x float not null,
        y float not null
);

copy axis_offset from '/home/dpavlin/zc/gnuplot/offset.txt' with ( format text, delimiter ' ' );