gnuplot: Basics

Simple usage boils down to something like:

1. Configure general chart options using set e.g. title, palette, terminal to plot with.
2. Draw the chart using plot

Notes on plotting:

• plot takes one or more files/functions/datasets to plot: plot 'info.dat'
• plot expects each dataset to have the appropriate number of columns for the chart type configured
• by default plot uses first data column as x and second as y: plot 'info.dat'
• override defaults to use particular columns for each dataset with using: plot 'info.dat' using 3:1