For an offline tool with GNUplot and LaTeX output, check out https://github.com/bingmann/sqlplot-tools/ https://github.com/bingmann/sqlplot-tools/ -- its intend

For an offline tool with GNUplot and LaTeX output, check out https://github.com/bingmann/sqlplot-tools/ https://github.com/bingmann/sqlplot-tools/ -- its intended use case is experimental evaluation (you output "RESULT key=val key2=val2" lines and the tool creates the DB schema for you and imports the data, then you run SQL queries to plot), but you can just as well use it with existing tables. It's a pretty neat tool that I use a lot.